diff --git a/src/screens/About/AboutDependenciesScreen.js b/src/screens/About/AboutDependenciesScreen.js
index 8e77afa..9c21693 100644
--- a/src/screens/About/AboutDependenciesScreen.js
+++ b/src/screens/About/AboutDependenciesScreen.js
@@ -4,6 +4,7 @@ import * as React from 'react';
 import {FlatList} from "react-native";
 import packageJson from '../../../package';
 import {List} from 'react-native-paper';
+import {StackNavigationProp} from "@react-navigation/stack";
 
 type listItem = {
     name: string,
@@ -16,7 +17,7 @@ type listItem = {
  * @param object The raw json
  * @return {Array<listItem>}
  */
-function generateListFromObject(object: { [string]: string }): Array<listItem> {
+function generateListFromObject(object: { [key: string]: string }): Array<listItem> {
     let list = [];
     let keys = Object.keys(object);
     let values = Object.values(object);
@@ -28,8 +29,7 @@ function generateListFromObject(object: { [string]: string }): Array<listItem> {
 }
 
 type Props = {
-    navigation: Object,
-    route: Object
+    navigation: StackNavigationProp,
 }
 
 const LIST_ITEM_HEIGHT = 64;
@@ -39,23 +39,23 @@ const LIST_ITEM_HEIGHT = 64;
  */
 export default class AboutDependenciesScreen extends React.Component<Props> {
 
-    data: Array<Object>;
+    data: Array<listItem>;
 
     constructor() {
         super();
         this.data = generateListFromObject(packageJson.dependencies);
     }
 
-    keyExtractor = (item: Object) => item.name;
+    keyExtractor = (item: listItem) => item.name;
 
-    renderItem = ({item}: Object) =>
+    renderItem = ({item}: { item: listItem }) =>
         <List.Item
             title={item.name}
             description={item.version.replace('^', '').replace('~', '')}
             style={{height: LIST_ITEM_HEIGHT}}
         />;
 
-    itemLayout = (data, index) => ({length: LIST_ITEM_HEIGHT, offset: LIST_ITEM_HEIGHT * index, index});
+    itemLayout = (data: any, index: number) => ({length: LIST_ITEM_HEIGHT, offset: LIST_ITEM_HEIGHT * index, index});
 
     render() {
         return (
diff --git a/src/screens/About/AboutScreen.js b/src/screens/About/AboutScreen.js
index d2544db..ceddccf 100644
--- a/src/screens/About/AboutScreen.js
+++ b/src/screens/About/AboutScreen.js
@@ -5,6 +5,14 @@ import {FlatList, Linking, Platform, View} from 'react-native';
 import i18n from "i18n-js";
 import {Avatar, Card, List, Title, withTheme} from 'react-native-paper';
 import packageJson from "../../../package.json";
+import {StackNavigationProp} from "@react-navigation/stack";
+
+type ListItem = {
+    onPressCallback: () => void,
+    icon: string,
+    text: string,
+    showChevron: boolean
+};
 
 const links = {
     appstore: 'https://apps.apple.com/us/app/campus-amicale-insat/id1477722148',
@@ -29,7 +37,7 @@ const links = {
 };
 
 type Props = {
-    navigation: Object,
+    navigation: StackNavigationProp,
 };
 
 /**
@@ -48,7 +56,7 @@ class AboutScreen extends React.Component<Props> {
     /**
      * Data to be displayed in the app card
      */
-    appData: Array<Object> = [
+    appData = [
         {
             onPressCallback: () => openWebLink(Platform.OS === "ios" ? links.appstore : links.playstore),
             icon: Platform.OS === "ios" ? 'apple' : 'google-play',
@@ -83,7 +91,7 @@ class AboutScreen extends React.Component<Props> {
     /**
      * Data to be displayed in the author card
      */
-    authorData: Array<Object> = [
+    authorData = [
         {
             onPressCallback: () => openWebLink(links.meme),
             icon: 'account-circle',
@@ -106,7 +114,7 @@ class AboutScreen extends React.Component<Props> {
     /**
      * Data to be displayed in the additional developer card
      */
-    additionalDevData: Array<Object> = [
+    additionalDevData = [
         {
             onPressCallback: () => console.log('Meme this'),
             icon: 'account',
@@ -129,7 +137,7 @@ class AboutScreen extends React.Component<Props> {
     /**
      * Data to be displayed in the technologies card
      */
-    technoData: Array<Object> = [
+    technoData = [
         {
             onPressCallback: () => openWebLink(links.react),
             icon: 'react',
@@ -146,7 +154,7 @@ class AboutScreen extends React.Component<Props> {
     /**
      * Order of information cards
      */
-    dataOrder: Array<Object> = [
+    dataOrder = [
         {
             id: 'app',
         },
@@ -158,16 +166,9 @@ class AboutScreen extends React.Component<Props> {
         },
     ];
 
-
-    colors: Object;
-
-    constructor(props) {
-        super(props);
-        this.colors = props.theme.colors;
-    }
-
     /**
      * Gets the app icon
+     *
      * @param props
      * @return {*}
      */
@@ -187,7 +188,7 @@ class AboutScreen extends React.Component<Props> {
      * @param item The item to extract the key from
      * @return {string} The extracted key
      */
-    keyExtractor(item: Object): string {
+    keyExtractor(item: ListItem): string {
         return item.icon;
     }
 
@@ -271,7 +272,7 @@ class AboutScreen extends React.Component<Props> {
      * @param props
      * @return {*}
      */
-    getChevronIcon(props: Object) {
+    getChevronIcon(props) {
         return (
             <List.Icon {...props} icon={'chevron-right'}/>
         );
@@ -284,18 +285,18 @@ class AboutScreen extends React.Component<Props> {
      * @param props
      * @return {*}
      */
-    getItemIcon(item: Object, props: Object) {
+    getItemIcon(item: ListItem, props) {
         return (
             <List.Icon {...props} icon={item.icon}/>
         );
     }
 
     /**
-     * Get a clickable card item to be rendered inside a card.
+     * Gets a clickable card item to be rendered inside a card.
      *
      * @returns {*}
      */
-    getCardItem = ({item}: Object) => {
+    getCardItem = ({item}: { item: ListItem }) => {
         const getItemIcon = this.getItemIcon.bind(this, item);
         if (item.showChevron) {
             return (
@@ -323,7 +324,7 @@ class AboutScreen extends React.Component<Props> {
      * @param item The item to show
      * @return {*}
      */
-    getMainCard = ({item}: Object) => {
+    getMainCard = ({item}: { item: { id: string } }) => {
         switch (item.id) {
             case 'app':
                 return this.getAppCard();
diff --git a/src/screens/About/DebugScreen.js b/src/screens/About/DebugScreen.js
index e9f8e8d..f1a0453 100644
--- a/src/screens/About/DebugScreen.js
+++ b/src/screens/About/DebugScreen.js
@@ -5,14 +5,24 @@ import {FlatList, View} from "react-native";
 import AsyncStorageManager from "../../managers/AsyncStorageManager";
 import CustomModal from "../../components/Overrides/CustomModal";
 import {Button, List, Subheading, TextInput, Title, withTheme} from 'react-native-paper';
+import {StackNavigationProp} from "@react-navigation/stack";
+import {Modalize} from "react-native-modalize";
+import type {CustomTheme} from "../../managers/ThemeManager";
+
+type PreferenceItem = {
+    key: string,
+    default: string,
+    current: string,
+}
 
 type Props = {
-    navigation: Object,
+    navigation: StackNavigationProp,
+    theme: CustomTheme
 };
 
 type State = {
-    modalCurrentDisplayItem: Object,
-    currentPreferences: Array<Object>,
+    modalCurrentDisplayItem: PreferenceItem,
+    currentPreferences: Array<PreferenceItem>,
 }
 
 /**
@@ -21,20 +31,20 @@ type State = {
  */
 class DebugScreen extends React.Component<Props, State> {
 
-    modalRef: Object;
-    modalInputValue = '';
-
-    onModalRef: Function;
-
-    colors: Object;
+    modalRef: Modalize;
+    modalInputValue: string;
 
+    /**
+     * Copies user preferences to state for easier manipulation
+     *
+     * @param props
+     */
     constructor(props) {
         super(props);
-        this.onModalRef = this.onModalRef.bind(this);
-        this.colors = props.theme.colors;
+        this.modalInputValue = "";
         let copy = {...AsyncStorageManager.getInstance().preferences};
-        let currentPreferences = [];
-        Object.values(copy).map((object) => {
+        let currentPreferences : Array<PreferenceItem> = [];
+        Object.values(copy).map((object: any) => {
             currentPreferences.push(object);
         });
         this.state = {
@@ -44,10 +54,11 @@ class DebugScreen extends React.Component<Props, State> {
     }
 
     /**
-     * Show the edit modal
+     * Shows the edit modal
+     *
      * @param item
      */
-    showEditModal(item: Object) {
+    showEditModal(item: PreferenceItem) {
         this.setState({
             modalCurrentDisplayItem: item
         });
@@ -81,14 +92,14 @@ class DebugScreen extends React.Component<Props, State> {
                     <Button
                         mode="contained"
                         dark={true}
-                        color={this.colors.success}
+                        color={this.props.theme.colors.success}
                         onPress={() => this.saveNewPrefs(this.state.modalCurrentDisplayItem.key, this.modalInputValue)}>
                         Save new value
                     </Button>
                     <Button
                         mode="contained"
                         dark={true}
-                        color={this.colors.danger}
+                        color={this.props.theme.colors.danger}
                         onPress={() => this.saveNewPrefs(this.state.modalCurrentDisplayItem.key, this.state.modalCurrentDisplayItem.default)}>
                         Reset to default
                     </Button>
@@ -98,6 +109,12 @@ class DebugScreen extends React.Component<Props, State> {
         );
     }
 
+    /**
+     * Finds the index of the given key in the preferences array
+     *
+     * @param key THe key to find the index of
+     * @returns {number}
+     */
     findIndexOfKey(key: string) {
         let index = -1;
         for (let i = 0; i < this.state.currentPreferences.length; i++) {
@@ -130,11 +147,11 @@ class DebugScreen extends React.Component<Props, State> {
      *
      * @param ref
      */
-    onModalRef(ref: Object) {
+    onModalRef = (ref: Modalize) => {
         this.modalRef = ref;
     }
 
-    renderItem = ({item}: Object) => {
+    renderItem = ({item}: {item: PreferenceItem}) => {
         return (
             <List.Item
                 title={item.key}
diff --git a/src/screens/Amicale/AmicaleContactScreen.js b/src/screens/Amicale/AmicaleContactScreen.js
index 10c817b..ef1c28f 100644
--- a/src/screens/Amicale/AmicaleContactScreen.js
+++ b/src/screens/Amicale/AmicaleContactScreen.js
@@ -12,14 +12,18 @@ type Props = {
     collapsibleStack: Collapsible
 };
 
-type State = {};
+type DatasetItem = {
+    name: string,
+    email: string,
+    icon: string,
+}
 
 /**
  * Class defining a planning event information page.
  */
-class AmicaleContactScreen extends React.Component<Props, State> {
-
+class AmicaleContactScreen extends React.Component<Props> {
 
+    // Dataset containing information about contacts
     CONTACT_DATASET = [
         {
             name: i18n.t("amicaleAbout.roles.interSchools"),
@@ -68,18 +72,11 @@ class AmicaleContactScreen extends React.Component<Props, State> {
         },
     ];
 
-    colors: Object;
+    keyExtractor = (item: DatasetItem) => item.email;
 
-    constructor(props) {
-        super(props);
-        this.colors = props.theme.colors;
-    }
+    getChevronIcon = (props) => <List.Icon {...props} icon={'chevron-right'}/>;
 
-    keyExtractor = (item: Object) => item.email;
-
-    getChevronIcon = (props: Object) => <List.Icon {...props} icon={'chevron-right'}/>;
-
-    renderItem = ({item}: Object) => {
+    renderItem = ({item}: { item: DatasetItem }) => {
         const onPress = () => Linking.openURL('mailto:' + item.email);
         return <List.Item
             title={item.name}
diff --git a/src/screens/Amicale/AmicaleHomeScreen.js b/src/screens/Amicale/AmicaleHomeScreen.js
deleted file mode 100644
index 8ed88ad..0000000
--- a/src/screens/Amicale/AmicaleHomeScreen.js
+++ /dev/null
@@ -1,85 +0,0 @@
-// @flow
-
-import * as React from 'react';
-import {ScrollView, StyleSheet} from "react-native";
-import {Button, withTheme} from 'react-native-paper';
-
-type Props = {
-    navigation: Object,
-    route: Object,
-}
-
-type State = {}
-
-class AmicaleHomeScreen extends React.Component<Props, State> {
-
-    state = {};
-
-    colors: Object;
-
-    constructor(props) {
-        super(props);
-
-        this.colors = props.theme.colors;
-    }
-
-    render() {
-        const nav = this.props.navigation;
-        return (
-            <ScrollView>
-                <Button
-                    icon={"login"}
-                    onPress={() => nav.navigate("login")}
-                >
-                    LOGIN
-                </Button>
-                <Button
-                    icon={"information"}
-                    onPress={() => nav.navigate("amicale-contact")}
-                >
-                    INFO
-                </Button>
-                <Button
-                    icon={"information"}
-                    onPress={() => nav.navigate("club-list")}
-                >
-                    CLUBS
-                </Button>
-                <Button
-                    icon={"information"}
-                    onPress={() => nav.navigate("profile")}
-                >
-                    PROFILE
-                </Button>
-                <Button
-                    icon={"information"}
-                    onPress={() => nav.navigate("vote")}
-                >
-                    VOTE
-                </Button>
-            </ScrollView>
-        );
-    }
-}
-
-const styles = StyleSheet.create({
-    container: {
-        flex: 1,
-        flexDirection: 'column',
-        justifyContent: 'center',
-    },
-    card: {
-        margin: 10,
-    },
-    header: {
-        fontSize: 36,
-        marginBottom: 48
-    },
-    textInput: {},
-    btnContainer: {
-        marginTop: 5,
-        marginBottom: 10,
-    }
-});
-
-export default withTheme(AmicaleHomeScreen);
diff --git a/src/screens/Amicale/Clubs/ClubAboutScreen.js b/src/screens/Amicale/Clubs/ClubAboutScreen.js
index b0f4aa5..fa44a4b 100644
--- a/src/screens/Amicale/Clubs/ClubAboutScreen.js
+++ b/src/screens/Amicale/Clubs/ClubAboutScreen.js
@@ -6,25 +6,11 @@ import {Card, List, Text, withTheme} from 'react-native-paper';
 import i18n from 'i18n-js';
 import Autolink from "react-native-autolink";
 
-type Props = {
-};
-
-type State = {
-};
+type Props = {};
 
 const CONTACT_LINK = 'clubs@amicale-insat.fr';
 
-/**
- * Class defining a planning event information page.
- */
-class ClubAboutScreen extends React.Component<Props, State> {
-
-    colors: Object;
-
-    constructor(props) {
-        super(props);
-        this.colors = props.theme.colors;
-    }
+class ClubAboutScreen extends React.Component<Props> {
 
     render() {
         return (
diff --git a/src/screens/Amicale/Clubs/ClubDisplayScreen.js b/src/screens/Amicale/Clubs/ClubDisplayScreen.js
index e1b8221..71787d3 100644
--- a/src/screens/Amicale/Clubs/ClubDisplayScreen.js
+++ b/src/screens/Amicale/Clubs/ClubDisplayScreen.js
@@ -65,6 +65,12 @@ class ClubDisplayScreen extends React.Component<Props, State> {
         }
     }
 
+    /**
+     * Gets the name of the category with the given ID
+     *
+     * @param id The category's ID
+     * @returns {string|*}
+     */
     getCategoryName(id: number) {
         if (this.categories !== null) {
             for (let i = 0; i < this.categories.length; i++) {
@@ -75,6 +81,12 @@ class ClubDisplayScreen extends React.Component<Props, State> {
         return "";
     }
 
+    /**
+     * Gets the view for rendering categories
+     *
+     * @param categories The categories to display (max 2)
+     * @returns {null|*}
+     */
     getCategoriesRender(categories: [number, number]) {
         if (this.categories === null)
             return null;
@@ -95,12 +107,19 @@ class ClubDisplayScreen extends React.Component<Props, State> {
         return <View style={{flexDirection: 'row', marginTop: 5}}>{final}</View>;
     }
 
-    getManagersRender(resp: Array<string>, email: string | null) {
-        let final = [];
-        for (let i = 0; i < resp.length; i++) {
-            final.push(<Paragraph key={i.toString()}>{resp[i]}</Paragraph>)
+    /**
+     * Gets the view for rendering club managers if any
+     *
+     * @param managers The list of manager names
+     * @param email The club contact email
+     * @returns {*}
+     */
+    getManagersRender(managers: Array<string>, email: string | null) {
+        let managersListView = [];
+        for (let i = 0; i < managers.length; i++) {
+            managersListView.push(<Paragraph key={i.toString()}>{managers[i]}</Paragraph>)
         }
-        const hasManagers = resp.length > 0;
+        const hasManagers = managers.length > 0;
         return (
             <Card style={{marginTop: 10, marginBottom: CustomTabBar.TAB_BAR_HEIGHT + 20}}>
                 <Card.Title
@@ -113,13 +132,20 @@ class ClubDisplayScreen extends React.Component<Props, State> {
                         icon="account-tie"/>}
                 />
                 <Card.Content>
-                    {final}
+                    {managersListView}
                     {this.getEmailButton(email, hasManagers)}
                 </Card.Content>
             </Card>
         );
     }
 
+    /**
+     * Gets the email button to contact the club, or the amicale if the club does not have any managers
+     *
+     * @param email The club contact email
+     * @param hasManagers True if the club has managers
+     * @returns {*}
+     */
     getEmailButton(email: string | null, hasManagers: boolean) {
         const destinationEmail = email != null && hasManagers
             ? email
@@ -141,13 +167,21 @@ class ClubDisplayScreen extends React.Component<Props, State> {
         );
     }
 
-    updateHeaderTitle(data: Object) {
+    /**
+     * Updates the header title to match the given club
+     *
+     * @param data The club data
+     */
+    updateHeaderTitle(data: club) {
         this.props.navigation.setOptions({title: data.name})
     }
 
-    getScreen = (response: Array<Object>) => {
-        let data: club = response[0];
-        this.updateHeaderTitle(data);
+    getScreen = (response: Array<{ [key: string]: any } | null>) => {
+        let data: club | null = null;
+        if (response[0] != null) {
+            data = response[0];
+            this.updateHeaderTitle(data);
+        }
         if (data != null) {
             return (
                 <ScrollView style={{paddingLeft: 5, paddingRight: 5}}>
@@ -184,7 +218,6 @@ class ClubDisplayScreen extends React.Component<Props, State> {
             );
         } else
             return null;
-
     };
 
     render() {
diff --git a/src/screens/Amicale/Clubs/ClubListScreen.js b/src/screens/Amicale/Clubs/ClubListScreen.js
index 0418197..9c7be04 100644
--- a/src/screens/Amicale/Clubs/ClubListScreen.js
+++ b/src/screens/Amicale/Clubs/ClubListScreen.js
@@ -131,6 +131,15 @@ class ClubListScreen extends React.Component<Props, State> {
 
     onChipSelect = (id: number) => this.updateFilteredData(null, id);
 
+    /**
+     * Updates the search string and category filter, saving them to the State.
+     *
+     * If the given category is already in the filter, it removes it.
+     * Otherwise it adds it to the filter.
+     *
+     * @param filterStr The new filter string to use
+     * @param categoryId The category to add/remove from the filter
+     */
     updateFilteredData(filterStr: string | null, categoryId: number | null) {
         let newCategoriesState = [...this.state.currentlySelectedCategories];
         let newStrState = this.state.currentSearchString;
@@ -150,6 +159,11 @@ class ClubListScreen extends React.Component<Props, State> {
             })
     }
 
+    /**
+     * Gets the list header, with controls to change the categories filter
+     *
+     * @returns {*}
+     */
     getListHeader() {
         return <ClubListHeader
             categories={this.categories}
@@ -158,6 +172,12 @@ class ClubListScreen extends React.Component<Props, State> {
         />;
     }
 
+    /**
+     * Gets the category object of the given ID
+     *
+     * @param id The ID of the category to find
+     * @returns {*}
+     */
     getCategoryOfId = (id: number) => {
         for (let i = 0; i < this.categories.length; i++) {
             if (id === this.categories[i].id)
@@ -165,6 +185,12 @@ class ClubListScreen extends React.Component<Props, State> {
         }
     };
 
+    /**
+     * Checks if the given item should be rendered according to current name and category filters
+     *
+     * @param item The club to check
+     * @returns {boolean}
+     */
     shouldRenderItem(item: club) {
         let shouldRender = this.state.currentlySelectedCategories.length === 0
             || isItemInCategoryFilter(this.state.currentlySelectedCategories, item.category);
diff --git a/src/screens/Amicale/LoginScreen.js b/src/screens/Amicale/LoginScreen.js
index d6429d5..5bf4ee5 100644
--- a/src/screens/Amicale/LoginScreen.js
+++ b/src/screens/Amicale/LoginScreen.js
@@ -11,10 +11,11 @@ import {Collapsible} from "react-navigation-collapsible";
 import CustomTabBar from "../../components/Tabbar/CustomTabBar";
 import type {CustomTheme} from "../../managers/ThemeManager";
 import AsyncStorageManager from "../../managers/AsyncStorageManager";
+import {StackNavigationProp} from "@react-navigation/stack";
 
 type Props = {
-    navigation: Object,
-    route: Object,
+    navigation: StackNavigationProp,
+    route: { params: { nextScreen: string } },
     collapsibleStack: Collapsible,
     theme: CustomTheme
 }
@@ -47,9 +48,9 @@ class LoginScreen extends React.Component<Props, State> {
         dialogError: 0,
     };
 
-    onEmailChange: Function;
-    onPasswordChange: Function;
-    passwordInputRef: Object;
+    onEmailChange: (value: string) => null;
+    onPasswordChange: (value: string) => null;
+    passwordInputRef: { current: null | TextInput };
 
     nextScreen: string | null;
 
@@ -64,7 +65,10 @@ class LoginScreen extends React.Component<Props, State> {
         this.handleNavigationParams();
     };
 
-    handleNavigationParams () {
+    /**
+     * Saves the screen to navigate to after a successful login if one was provided in navigation parameters
+     */
+    handleNavigationParams() {
         if (this.props.route.params != null) {
             if (this.props.route.params.nextScreen != null)
                 this.nextScreen = this.props.route.params.nextScreen;
@@ -73,6 +77,11 @@ class LoginScreen extends React.Component<Props, State> {
         }
     }
 
+    /**
+     * Shows an error dialog with the corresponding login error
+     *
+     * @param error The error given by the login request
+     */
     showErrorDialog = (error: number) =>
         this.setState({
             dialogVisible: true,
@@ -81,6 +90,10 @@ class LoginScreen extends React.Component<Props, State> {
 
     hideErrorDialog = () => this.setState({dialogVisible: false});
 
+    /**
+     * Navigates to the screen specified in navigation parameters or simply go back tha stack.
+     * Saves in user preferences to not show the login banner again.
+     */
     handleSuccess = () => {
         // Do not show the login banner again
         AsyncStorageManager.getInstance().savePref(
@@ -93,32 +106,75 @@ class LoginScreen extends React.Component<Props, State> {
             this.props.navigation.replace(this.nextScreen);
     };
 
+    /**
+     * Navigates to the Amicale website screen with the reset password link as navigation parameters
+     */
     onResetPasswordClick = () => this.props.navigation.navigate('amicale-website', {path: RESET_PASSWORD_PATH});
 
+    /**
+     * The user has unfocused the input, his email is ready to be validated
+     */
     validateEmail = () => this.setState({isEmailValidated: true});
 
+    /**
+     * Checks if the entered email is valid (matches the regex)
+     *
+     * @returns {boolean}
+     */
     isEmailValid() {
         return emailRegex.test(this.state.email);
     }
 
+    /**
+     * Checks if we should tell the user his email is invalid.
+     * We should only show this if his email is invalid and has been checked when un-focusing the input
+     *
+     * @returns {boolean|boolean}
+     */
     shouldShowEmailError() {
         return this.state.isEmailValidated && !this.isEmailValid();
     }
 
+    /**
+     * The user has unfocused the input, his password is ready to be validated
+     */
     validatePassword = () => this.setState({isPasswordValidated: true});
 
+    /**
+     * Checks if the user has entered a password
+     *
+     * @returns {boolean}
+     */
     isPasswordValid() {
         return this.state.password !== '';
     }
 
+    /**
+     * Checks if we should tell the user his password is invalid.
+     * We should only show this if his password is invalid and has been checked when un-focusing the input
+     *
+     * @returns {boolean|boolean}
+     */
     shouldShowPasswordError() {
         return this.state.isPasswordValidated && !this.isPasswordValid();
     }
 
+    /**
+     * If the email and password are valid, and we are not loading a request, then the login button can be enabled
+     *
+     * @returns {boolean}
+     */
     shouldEnableLogin() {
         return this.isEmailValid() && this.isPasswordValid() && !this.state.loading;
     }
 
+    /**
+     * Called when the user input changes in the email or password field.
+     * This saves the new value in the State and disabled input validation (to prevent errors to show while typing)
+     *
+     * @param isEmail True if the field is the email field
+     * @param value The new field value
+     */
     onInputChange(isEmail: boolean, value: string) {
         if (isEmail) {
             this.setState({
@@ -133,8 +189,23 @@ class LoginScreen extends React.Component<Props, State> {
         }
     }
 
-    onEmailSubmit = () => this.passwordInputRef.focus();
+    /**
+     * Focuses the password field when the email field is done
+     *
+     * @returns {*}
+     */
+    onEmailSubmit = () => {
+        if (this.passwordInputRef.current != null)
+            this.passwordInputRef.current.focus();
+    }
 
+    /**
+     * Called when the user clicks on login or finishes to type his password.
+     *
+     * Checks if we should allow the user to login,
+     * then makes the login request and enters a loading state until the request finishes
+     *
+     */
     onSubmit = () => {
         if (this.shouldEnableLogin()) {
             this.setState({loading: true});
@@ -147,6 +218,11 @@ class LoginScreen extends React.Component<Props, State> {
         }
     };
 
+    /**
+     * Gets the form input
+     *
+     * @returns {*}
+     */
     getFormInput() {
         return (
             <View>
@@ -173,9 +249,7 @@ class LoginScreen extends React.Component<Props, State> {
                     {i18n.t("loginScreen.emailError")}
                 </HelperText>
                 <TextInput
-                    ref={(ref) => {
-                        this.passwordInputRef = ref;
-                    }}
+                    ref={this.passwordInputRef}
                     label={i18n.t("loginScreen.password")}
                     mode='outlined'
                     value={this.state.password}
@@ -201,6 +275,10 @@ class LoginScreen extends React.Component<Props, State> {
         );
     }
 
+    /**
+     * Gets the card containing the input form
+     * @returns {*}
+     */
     getMainCard() {
         return (
             <Card style={styles.card}>
@@ -239,6 +317,11 @@ class LoginScreen extends React.Component<Props, State> {
         );
     }
 
+    /**
+     * Gets the card containing the information about the Amicale account
+     *
+     * @returns {*}
+     */
     getSecondaryCard() {
         return (
             <Card style={styles.card}>
diff --git a/src/screens/Amicale/ProfileScreen.js b/src/screens/Amicale/ProfileScreen.js
index b6644c1..189da6b 100644
--- a/src/screens/Amicale/ProfileScreen.js
+++ b/src/screens/Amicale/ProfileScreen.js
@@ -12,10 +12,12 @@ import {Collapsible} from "react-navigation-collapsible";
 import {withCollapsible} from "../../utils/withCollapsible";
 import type {cardList} from "../../components/Lists/CardList/CardList";
 import CardList from "../../components/Lists/CardList/CardList";
+import {StackNavigationProp} from "@react-navigation/stack";
+import type {CustomTheme} from "../../managers/ThemeManager";
 
 type Props = {
-    navigation: Object,
-    theme: Object,
+    navigation: StackNavigationProp,
+    theme: CustomTheme,
     collapsibleStack: Collapsible,
 }
 
@@ -23,6 +25,23 @@ type State = {
     dialogVisible: boolean,
 }
 
+type ProfileData = {
+    first_name: string,
+    last_name: string,
+    email: string,
+    birthday: string,
+    phone: string,
+    branch: string,
+    link: string,
+    validity: boolean,
+    clubs: Array<Club>,
+}
+type Club = {
+    id: number,
+    name: string,
+    is_manager: boolean,
+}
+
 const CLUBS_IMAGE = "https://etud.insa-toulouse.fr/~amicale_app/images/Clubs.png";
 const VOTE_IMAGE = "https://etud.insa-toulouse.fr/~amicale_app/images/Vote.png";
 
@@ -34,9 +53,9 @@ class ProfileScreen extends React.Component<Props, State> {
         dialogVisible: false,
     };
 
-    data: Object;
+    data: ProfileData;
 
-    flatListData: Array<Object>;
+    flatListData: Array<{ id: string }>;
     amicaleDataset: cardList;
 
     constructor() {
@@ -79,12 +98,25 @@ class ProfileScreen extends React.Component<Props, State> {
 
     hideDisconnectDialog = () => this.setState({dialogVisible: false});
 
+    /**
+     * Gets the logout header button
+     *
+     * @returns {*}
+     */
     getHeaderButton = () => <MaterialHeaderButtons>
         <Item title="logout" iconName="logout" onPress={this.showDisconnectDialog}/>
     </MaterialHeaderButtons>;
 
-    getScreen = (data: Object) => {
-        this.data = data[0];
+    /**
+     * Gets the main screen component with the fetched data
+     *
+     * @param data The data fetched from the server
+     * @returns {*}
+     */
+    getScreen = (data: Array<{ [key: string]: any } | null>) => {
+        if (data[0] != null) {
+            this.data = data[0];
+        }
         const {containerPaddingTop, scrollIndicatorInsetTop, onScroll} = this.props.collapsibleStack;
         return (
             <View style={{flex: 1}}>
@@ -109,7 +141,7 @@ class ProfileScreen extends React.Component<Props, State> {
         )
     };
 
-    getRenderItem = ({item}: Object) => {
+    getRenderItem = ({item}: { item: { id: string } }) => {
         switch (item.id) {
             case '0':
                 return this.getWelcomeCard();
@@ -122,6 +154,11 @@ class ProfileScreen extends React.Component<Props, State> {
         }
     };
 
+    /**
+     * Gets the list of services available with the Amicale account
+     *
+     * @returns {*}
+     */
     getServicesList() {
         return (
             <CardList
@@ -131,12 +168,17 @@ class ProfileScreen extends React.Component<Props, State> {
         );
     }
 
+    /**
+     * Gets a card welcoming the user to his account
+     *
+     * @returns {*}
+     */
     getWelcomeCard() {
         return (
             <Card style={styles.card}>
                 <Card.Title
                     title={i18n.t("profileScreen.welcomeTitle", {name: this.data.first_name})}
-                    left={(props) => <Avatar.Image
+                    left={() => <Avatar.Image
                         size={64}
                         source={ICON_AMICALE}
                         style={{backgroundColor: 'transparent',}}
@@ -340,7 +382,7 @@ class ProfileScreen extends React.Component<Props, State> {
      * @param item The club to render
      * @return {*}
      */
-    clubListItem = ({item}: Object) => {
+    clubListItem = ({item}: { item: Club }) => {
         const onPress = () => this.openClubDetailsScreen(item.id);
         let description = i18n.t("profileScreen.isMember");
         let icon = (props) => <List.Icon {...props} icon="chevron-right"/>;
@@ -356,9 +398,9 @@ class ProfileScreen extends React.Component<Props, State> {
         />;
     };
 
-    clubKeyExtractor = (item: Object) => item.name;
+    clubKeyExtractor = (item: Club) => item.name;
 
-    sortClubList = (a: Object, b: Object) => a.is_manager ? -1 : 1;
+    sortClubList = (a: Club, b: Club) => a.is_manager ? -1 : 1;
 
     /**
      * Renders the list of clubs the user is part of
@@ -366,7 +408,7 @@ class ProfileScreen extends React.Component<Props, State> {
      * @param list The club list
      * @return {*}
      */
-    getClubList(list: Array<Object>) {
+    getClubList(list: Array<Club>) {
         list.sort(this.sortClubList);
         return (
             //$FlowFixMe
diff --git a/src/screens/Amicale/VoteScreen.js b/src/screens/Amicale/VoteScreen.js
index 39defc8..44e08f4 100644
--- a/src/screens/Amicale/VoteScreen.js
+++ b/src/screens/Amicale/VoteScreen.js
@@ -9,6 +9,7 @@ import VoteTease from "../../components/Amicale/Vote/VoteTease";
 import VoteSelect from "../../components/Amicale/Vote/VoteSelect";
 import VoteResults from "../../components/Amicale/Vote/VoteResults";
 import VoteWait from "../../components/Amicale/Vote/VoteWait";
+import {StackNavigationProp} from "@react-navigation/stack";
 
 export type team = {
     id: number,
@@ -86,13 +87,16 @@ type objectVoteDates = {
 const MIN_REFRESH_TIME = 5 * 1000;
 
 type Props = {
-    navigation: Object
+    navigation: StackNavigationProp
 }
 
 type State = {
     hasVoted: boolean,
 }
 
+/**
+ * Screen displaying vote information and controls
+ */
 export default class VoteScreen extends React.Component<Props, State> {
 
     state = {
@@ -107,7 +111,7 @@ export default class VoteScreen extends React.Component<Props, State> {
     today: Date;
 
     mainFlatListData: Array<{ key: string }>;
-    lastRefresh: Date;
+    lastRefresh: Date | null;
 
     authRef: { current: null | AuthenticatedScreen };
 
@@ -116,22 +120,30 @@ export default class VoteScreen extends React.Component<Props, State> {
         this.hasVoted = false;
         this.today = new Date();
         this.authRef = React.createRef();
+        this.lastRefresh = null;
         this.mainFlatListData = [
             {key: 'main'},
             {key: 'info'},
         ]
     }
 
+    /**
+     * Reloads vote data if last refresh delta is smaller than the minimum refresh time
+     */
     reloadData = () => {
         let canRefresh;
-        if (this.lastRefresh !== undefined)
-            canRefresh = (new Date().getTime() - this.lastRefresh.getTime()) > MIN_REFRESH_TIME;
+        const lastRefresh = this.lastRefresh;
+        if (lastRefresh != null)
+            canRefresh = (new Date().getTime() - lastRefresh.getTime()) > MIN_REFRESH_TIME;
         else
             canRefresh = true;
         if (canRefresh && this.authRef.current != null)
             this.authRef.current.reload()
     };
 
+    /**
+     * Generates the objects containing string and Date representations of key vote dates
+     */
     generateDateObject() {
         const strings = this.datesString;
         if (strings != null) {
@@ -152,6 +164,16 @@ export default class VoteScreen extends React.Component<Props, State> {
             this.dates = null;
     }
 
+    /**
+     * Gets the string representation of the given date.
+     *
+     * If the given date is the same day as today, only return the tile.
+     * Otherwise, return the full date.
+     *
+     * @param date The Date object representation of the wanted date
+     * @param dateString The string representation of the wanted date
+     * @returns {string}
+     */
     getDateString(date: Date, dateString: string): string {
         if (this.today.getDate() === date.getDate()) {
             const str = getTimeOnlyString(dateString);
@@ -176,7 +198,7 @@ export default class VoteScreen extends React.Component<Props, State> {
         return this.dates != null && this.today > this.dates.date_result_begin;
     }
 
-    mainRenderItem = ({item}: Object) => {
+    mainRenderItem = ({item}: { item: { key: string } }) => {
         if (item.key === 'info')
             return <VoteTitle/>;
         else if (item.key === 'main' && this.dates != null)
@@ -190,8 +212,8 @@ export default class VoteScreen extends React.Component<Props, State> {
         // data[1] = FAKE_DATE;
         this.lastRefresh = new Date();
 
-        const teams : teamResponse | null = data[0];
-        const dateStrings : stringVoteDates | null = data[1];
+        const teams: teamResponse | null = data[0];
+        const dateStrings: stringVoteDates | null = data[1];
 
         if (dateStrings != null && dateStrings.date_begin == null)
             this.datesString = null;
@@ -282,6 +304,13 @@ export default class VoteScreen extends React.Component<Props, State> {
                          isVoteRunning={this.isVoteRunning()}/>;
     }
 
+    /**
+     * Renders the authenticated screen.
+     *
+     * Teams and dates are not mandatory to allow showing the information box even if api requests fail
+     *
+     * @returns {*}
+     */
     render() {
         return (
             <AuthenticatedScreen
diff --git a/src/screens/Home/FeedItemScreen.js b/src/screens/Home/FeedItemScreen.js
index 7373ba5..04487a5 100644
--- a/src/screens/Home/FeedItemScreen.js
+++ b/src/screens/Home/FeedItemScreen.js
@@ -7,29 +7,29 @@ import ImageModal from 'react-native-image-modal';
 import Autolink from "react-native-autolink";
 import MaterialHeaderButtons, {Item} from "../../components/Overrides/CustomHeaderButton";
 import CustomTabBar from "../../components/Tabbar/CustomTabBar";
+import {StackNavigationProp} from "@react-navigation/stack";
+import type {feedItem} from "./HomeScreen";
 
 type Props = {
-    navigation: Object,
-    route: Object
+    navigation: StackNavigationProp,
+    route: { params: { data: feedItem, date: string } }
 };
 
 const ICON_AMICALE = require('../../../assets/amicale.png');
 const NAME_AMICALE = 'Amicale INSA Toulouse';
+
 /**
- * Class defining a planning event information page.
+ * Class defining a feed item page.
  */
 class FeedItemScreen extends React.Component<Props> {
 
-    displayData: Object;
+    displayData: feedItem;
     date: string;
 
-    colors: Object;
-
     constructor(props) {
         super(props);
-        this.colors = props.theme.colors;
-        this.displayData = this.props.route.params.data;
-        this.date = this.props.route.params.date;
+        this.displayData = props.route.params.data;
+        this.date = props.route.params.date;
     }
 
     componentDidMount() {
@@ -38,16 +38,29 @@ class FeedItemScreen extends React.Component<Props> {
         });
     }
 
+    /**
+     * Opens the feed item out link in browser or compatible app
+     */
     onOutLinkPress = () => {
         Linking.openURL(this.displayData.permalink_url);
     };
 
+    /**
+     * Gets the out link header button
+     *
+     * @returns {*}
+     */
     getHeaderButton = () => {
         return <MaterialHeaderButtons>
             <Item title="main" iconName={'facebook'} color={"#2e88fe"} onPress={this.onOutLinkPress}/>
         </MaterialHeaderButtons>;
     };
 
+    /**
+     * Gets the Amicale INSA avatar
+     *
+     * @returns {*}
+     */
     getAvatar() {
         return (
             <Avatar.Image size={48} source={ICON_AMICALE}
@@ -55,8 +68,8 @@ class FeedItemScreen extends React.Component<Props> {
         );
     }
 
-    getContent() {
-        const hasImage = this.displayData.full_picture !== '' && this.displayData.full_picture !== undefined;
+    render() {
+        const hasImage = this.displayData.full_picture !== '' && this.displayData.full_picture != null;
         return (
             <ScrollView style={{margin: 5,}}>
                 <Card.Title
@@ -89,10 +102,6 @@ class FeedItemScreen extends React.Component<Props> {
             </ScrollView>
         );
     }
-
-    render() {
-        return this.getContent();
-    }
 }
 
 export default withTheme(FeedItemScreen);
diff --git a/src/screens/Home/HomeScreen.js b/src/screens/Home/HomeScreen.js
index a0492f0..1aae2dd 100644
--- a/src/screens/Home/HomeScreen.js
+++ b/src/screens/Home/HomeScreen.js
@@ -111,8 +111,6 @@ type State = {
  */
 class HomeScreen extends React.Component<Props, State> {
 
-    colors: Object;
-
     isLoggedIn: boolean | null;
 
     fabRef: { current: null | AnimatedFAB };
@@ -125,7 +123,6 @@ class HomeScreen extends React.Component<Props, State> {
 
     constructor(props) {
         super(props);
-        this.colors = props.theme.colors;
         this.fabRef = React.createRef();
         this.currentNewFeed = [];
         this.isLoggedIn = null;
@@ -155,6 +152,9 @@ class HomeScreen extends React.Component<Props, State> {
         })
     }
 
+    /**
+     * Updates login state and navigation parameters on screen focus
+     */
     onScreenFocus = () => {
         if (ConnectionManager.getInstance().isLoggedIn() !== this.isLoggedIn) {
             this.isLoggedIn = ConnectionManager.getInstance().isLoggedIn();
@@ -169,6 +169,9 @@ class HomeScreen extends React.Component<Props, State> {
         this.handleNavigationParams();
     };
 
+    /**
+     * Navigates to the a new screen if navigation parameters specify one
+     */
     handleNavigationParams = () => {
         if (this.props.route.params != null) {
             if (this.props.route.params.nextScreen != null) {
@@ -179,6 +182,11 @@ class HomeScreen extends React.Component<Props, State> {
         }
     };
 
+    /**
+     * Gets header buttons based on login state
+     *
+     * @returns {*}
+     */
     getHeaderButton = () => {
         let onPressLog = () => this.props.navigation.navigate("login", {nextScreen: "profile"});
         let logIcon = "login";
@@ -262,7 +270,7 @@ class HomeScreen extends React.Component<Props, State> {
                         id: 'washers',
                         data: dashboardData == null ? 0 : dashboardData.available_machines.washers,
                         icon: 'washing-machine',
-                        color: this.colors.proxiwashColor,
+                        color: this.props.theme.colors.proxiwashColor,
                         onPress: this.onProxiwashClick,
                         isAvailable: dashboardData == null ? false : dashboardData.available_machines.washers > 0
                     },
@@ -270,7 +278,7 @@ class HomeScreen extends React.Component<Props, State> {
                         id: 'dryers',
                         data: dashboardData == null ? 0 : dashboardData.available_machines.dryers,
                         icon: 'tumble-dryer',
-                        color: this.colors.proxiwashColor,
+                        color: this.props.theme.colors.proxiwashColor,
                         onPress: this.onProxiwashClick,
                         isAvailable: dashboardData == null ? false : dashboardData.available_machines.dryers > 0
                     },
@@ -278,7 +286,7 @@ class HomeScreen extends React.Component<Props, State> {
                         id: 'available_tutorials',
                         data: dashboardData == null ? 0 : dashboardData.available_tutorials,
                         icon: 'school',
-                        color: this.colors.tutorinsaColor,
+                        color: this.props.theme.colors.tutorinsaColor,
                         onPress: this.onTutorInsaClick,
                         isAvailable: dashboardData == null ? false : dashboardData.available_tutorials > 0
                     },
@@ -286,7 +294,7 @@ class HomeScreen extends React.Component<Props, State> {
                         id: 'proximo_articles',
                         data: dashboardData == null ? 0 : dashboardData.proximo_articles,
                         icon: 'shopping',
-                        color: this.colors.proximoColor,
+                        color: this.props.theme.colors.proximoColor,
                         onPress: this.onProximoClick,
                         isAvailable: dashboardData == null ? false : dashboardData.proximo_articles > 0
                     },
@@ -294,7 +302,7 @@ class HomeScreen extends React.Component<Props, State> {
                         id: 'today_menu',
                         data: dashboardData == null ? [] : dashboardData.today_menu,
                         icon: 'silverware-fork-knife',
-                        color: this.colors.menuColor,
+                        color: this.props.theme.colors.menuColor,
                         onPress: this.onMenuClick,
                         isAvailable: dashboardData == null ? false : dashboardData.today_menu.length > 0
                     },
@@ -324,6 +332,11 @@ class HomeScreen extends React.Component<Props, State> {
             return this.getDashboardActions();
     }
 
+    /**
+     * Gets a dashboard item with action buttons
+     *
+     * @returns {*}
+     */
     getDashboardActions() {
         return <ActionsDashBoardItem {...this.props} isLoggedIn={this.isLoggedIn}/>;
     }
@@ -446,7 +459,7 @@ class HomeScreen extends React.Component<Props, State> {
     onEventContainerClick = () => this.props.navigation.navigate('planning');
 
     /**
-     * Gets the event render item.
+     * Gets the event dashboard render item.
      * If a preview is available, it will be rendered inside
      *
      * @param content
@@ -473,6 +486,12 @@ class HomeScreen extends React.Component<Props, State> {
         );
     }
 
+    /**
+     * Gets a dashboard shortcut item
+     *
+     * @param item
+     * @returns {*}
+     */
     dashboardRowRenderItem = ({item}: { item: dashboardSmallItem }) => {
         return (
             <SquareDashboardItem
@@ -486,7 +505,7 @@ class HomeScreen extends React.Component<Props, State> {
     };
 
     /**
-     * Gets a classic dashboard item.
+     * Gets a dashboard item with a row of shortcut buttons.
      *
      * @param content
      * @return {*}
@@ -553,7 +572,7 @@ class HomeScreen extends React.Component<Props, State> {
 
     /**
      * Callback used when closing the banner.
-     * This hides the banner and saves to preferences to prevent it from reopening
+     * This hides the banner and saves to preferences to prevent it from reopening.
      */
     onHideBanner = () => {
         this.setState({bannerVisible: false});
@@ -563,6 +582,10 @@ class HomeScreen extends React.Component<Props, State> {
         );
     };
 
+    /**
+     * Callback when pressing the login button on the banner.
+     * This hides the banner and takes the user to the login page.
+     */
     onLoginBanner = () => {
         this.onHideBanner();
         this.props.navigation.navigate("login", {nextScreen: "profile"});
diff --git a/src/screens/Home/ScannerScreen.js b/src/screens/Home/ScannerScreen.js
index 7ee8fc5..9e91639 100644
--- a/src/screens/Home/ScannerScreen.js
+++ b/src/screens/Home/ScannerScreen.js
@@ -41,6 +41,9 @@ class ScannerScreen extends React.Component<Props, State> {
         this.requestPermissions();
     }
 
+    /**
+     * Requests permission to use the camera
+     */
     requestPermissions = () => {
         if (Platform.OS === 'android')
             request(PERMISSIONS.ANDROID.CAMERA).then(this.updatePermissionStatus)
@@ -48,8 +51,19 @@ class ScannerScreen extends React.Component<Props, State> {
             request(PERMISSIONS.IOS.CAMERA).then(this.updatePermissionStatus)
     };
 
+    /**
+     * Updates the state permission status
+     *
+     * @param result
+     */
     updatePermissionStatus = (result) => this.setState({hasPermission: result === RESULTS.GRANTED});
 
+    /**
+     * Opens scanned link if it is a valid app link or shows and error dialog
+     *
+     * @param type The barcode type
+     * @param data The scanned value
+     */
     handleCodeScanned = ({type, data}) => {
         if (!URLHandler.isUrlValid(data))
             this.showErrorDialog();
@@ -59,6 +73,11 @@ class ScannerScreen extends React.Component<Props, State> {
         }
     };
 
+    /**
+     * Gets a view asking user for permission to use the camera
+     *
+     * @returns {*}
+     */
     getPermissionScreen() {
         return <View style={{marginLeft: 10, marginRight: 10}}>
             <Text>{i18n.t("scannerScreen.errorPermission")}</Text>
@@ -77,6 +96,9 @@ class ScannerScreen extends React.Component<Props, State> {
         </View>
     }
 
+    /**
+     * Shows a dialog indicating how to use the scanner
+     */
     showHelpDialog = () => {
         this.setState({
             dialogVisible: true,
@@ -86,6 +108,9 @@ class ScannerScreen extends React.Component<Props, State> {
         });
     };
 
+    /**
+     * Shows a loading dialog
+     */
     showOpeningDialog = () => {
         this.setState({
             loading: true,
@@ -93,6 +118,9 @@ class ScannerScreen extends React.Component<Props, State> {
         });
     };
 
+    /**
+     * Shows a dialog indicating the user the scanned code was invalid
+     */
     showErrorDialog() {
         this.setState({
             dialogVisible: true,
@@ -102,11 +130,21 @@ class ScannerScreen extends React.Component<Props, State> {
         });
     }
 
+    /**
+     * Hide any dialog
+     */
     onDialogDismiss = () => this.setState({
         dialogVisible: false,
         scanned: false,
     });
 
+    /**
+     * Gets a view with the scanner.
+     * This scanner uses the back camera, can only scan qr codes and has a square mask on the center.
+     * The mask is only for design purposes as a code is scanned as soon as it enters the camera view
+     *
+     * @returns {*}
+     */
     getScanner() {
         return (
             <RNCamera
diff --git a/src/utils/Search.js b/src/utils/Search.js
index 9c6d437..edbc68e 100644
--- a/src/utils/Search.js
+++ b/src/utils/Search.js
@@ -32,10 +32,10 @@ export function stringMatchQuery(str: string, query: string) {
  * Checks if the given arrays have an item in common
  *
  * @param filter The filter array
- * @param categories The item's categories array
+ * @param categories The item's categories tuple
  * @returns {boolean} True if at least one entry is in both arrays
  */
-export function isItemInCategoryFilter(filter: Array<string>, categories: Array<string>) {
+export function isItemInCategoryFilter(filter: Array<number>, categories: [number, number]) {
     for (const category of categories) {
         if (filter.indexOf(category) !== -1)
             return true;