diff --git a/eslint.config.js b/eslint.config.js
index cb0233c52..a1c5222b9 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -13,8 +13,6 @@ module.exports = defineConfig([
     extends: [angular.configs.tsRecommended],
     processor: angular.processInlineTemplates,
     rules: {
-      // Ionic's base level; `recommended` makes it an error, which is meant for libraries.
-      '@typescript-eslint/explicit-module-boundary-types': 'warn',
       '@typescript-eslint/explicit-member-accessibility': 'off',
       '@typescript-eslint/explicit-function-return-type': 'off',
       '@typescript-eslint/no-inferrable-types': ['error', { ignoreParameters: true }],
diff --git a/package.json b/package.json
index 0a5879459..b69a8a78d 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "lint": "npm run eslint && npm run lint:sass && npm run prettier -- --check",
     "lint:sass": "stylelint \"src/**/*.scss\"",
     "lint:fix": "npm run eslint -- --fix && npm run prettier -- --write",
-    "eslint": "ng lint",
+    "eslint": "ng lint --max-warnings 0",
     "prettier": "prettier \"**/*.{ts,html}\""
   },
   "repository": {
diff --git a/src/app/app.component.ts b/src/app/app.component.ts
index 139522c33..35793189a 100644
--- a/src/app/app.component.ts
+++ b/src/app/app.component.ts
@@ -114,7 +114,7 @@ export class AppComponent implements OnInit {
     });
   }
 
-  async ngOnInit() {
+  async ngOnInit(): Promise<void> {
     this.initializeApp();
     await this.storage.create();
     this.checkLoginStatus();
@@ -141,7 +141,7 @@ export class AppComponent implements OnInit {
     });
   }
 
-  initializeApp() {
+  initializeApp(): void {
     this.platform.ready().then(() => {
       if (this.platform.is('hybrid')) {
         StatusBar.hide();
@@ -150,19 +150,19 @@ export class AppComponent implements OnInit {
     });
   }
 
-  checkLoginStatus() {
+  checkLoginStatus(): Promise<void> {
     return this.userService.isLoggedIn().then((loggedIn) => {
       return this.updateLoggedInStatus(loggedIn);
     });
   }
 
-  updateLoggedInStatus(loggedIn: boolean) {
+  updateLoggedInStatus(loggedIn: boolean): void {
     setTimeout(() => {
       this.loggedIn.set(loggedIn);
     }, 300);
   }
 
-  listenForLoginEvents() {
+  listenForLoginEvents(): void {
     window.addEventListener('user:login', () => {
       this.updateLoggedInStatus(true);
     });
@@ -176,19 +176,19 @@ export class AppComponent implements OnInit {
     });
   }
 
-  logout() {
+  logout(): void {
     this.userService.logout().then(() => {
       return this.router.navigateByUrl('/app/tabs/schedule');
     });
   }
 
-  openTutorial() {
+  openTutorial(): void {
     this.menu.enable(false);
     this.storage.set('ion_did_tutorial', false);
     this.router.navigateByUrl('/tutorial');
   }
 
-  toggleDarkMode() {
+  toggleDarkMode(): void {
     document.documentElement.classList.toggle('ion-palette-dark', this.dark);
   }
 }
diff --git a/src/app/pages/about-popover/about-popover.ts b/src/app/pages/about-popover/about-popover.ts
index b18a9dd3c..8988c9ab8 100644
--- a/src/app/pages/about-popover/about-popover.ts
+++ b/src/app/pages/about-popover/about-popover.ts
@@ -29,12 +29,12 @@ export class PopoverPage {
   private router = inject(Router);
   private popoverCtrl = inject(PopoverController);
 
-  support() {
+  support(): void {
     this.router.navigate(['/support']);
     this.popoverCtrl.dismiss();
   }
 
-  close(url: string) {
+  close(url: string): void {
     window.open(url, '_blank');
     this.popoverCtrl.dismiss();
   }
diff --git a/src/app/pages/about/about.ts b/src/app/pages/about/about.ts
index 70acbb246..c70c3beea 100644
--- a/src/app/pages/about/about.ts
+++ b/src/app/pages/about/about.ts
@@ -64,7 +64,7 @@ export class AboutPage {
     addIcons({ ellipsisHorizontal, ellipsisVertical });
   }
 
-  async presentPopover(event: Event) {
+  async presentPopover(event: Event): Promise<void> {
     const popover = await this.popoverCtrl.create({
       component: PopoverPage,
       event,
diff --git a/src/app/pages/account/account.ts b/src/app/pages/account/account.ts
index f4b70e193..96bb661f3 100644
--- a/src/app/pages/account/account.ts
+++ b/src/app/pages/account/account.ts
@@ -30,18 +30,18 @@ export class AccountPage implements AfterViewInit {
 
   username = signal<string>('');
 
-  ngAfterViewInit() {
+  ngAfterViewInit(): void {
     this.getUsername();
   }
 
-  updatePicture() {
+  updatePicture(): void {
     console.log('Clicked to update picture');
   }
 
   // Present an alert with the current username populated
   // clicking OK will update the username and display it
   // clicking Cancel will close the alert and do nothing
-  async changeUsername() {
+  async changeUsername(): Promise<void> {
     const alert = await this.alertCtrl.create({
       header: 'Change Username',
       buttons: [
@@ -67,22 +67,22 @@ export class AccountPage implements AfterViewInit {
     await alert.present();
   }
 
-  getUsername() {
+  getUsername(): void {
     this.user.getUsername().then((username) => {
       this.username.set(username ?? '');
     });
   }
 
-  changePassword() {
+  changePassword(): void {
     console.log('Clicked to change password');
   }
 
-  logout() {
+  logout(): void {
     this.user.logout();
     this.router.navigateByUrl('/login');
   }
 
-  support() {
+  support(): void {
     this.router.navigateByUrl('/support');
   }
 }
diff --git a/src/app/pages/login/login.ts b/src/app/pages/login/login.ts
index 0a1b72d6e..a44cc8ad2 100644
--- a/src/app/pages/login/login.ts
+++ b/src/app/pages/login/login.ts
@@ -43,7 +43,7 @@ export class LoginPage {
   login: UserOptions = { username: '', password: '' };
   submitted = false;
 
-  onLogin(form: NgForm) {
+  onLogin(form: NgForm): void {
     this.submitted = true;
 
     if (form.valid) {
@@ -52,7 +52,7 @@ export class LoginPage {
     }
   }
 
-  onSignup() {
+  onSignup(): void {
     this.router.navigateByUrl('/signup');
   }
 }
diff --git a/src/app/pages/map/map.ts b/src/app/pages/map/map.ts
index 0ab0f228b..2b0148019 100644
--- a/src/app/pages/map/map.ts
+++ b/src/app/pages/map/map.ts
@@ -37,7 +37,7 @@ export class MapPage implements AfterViewInit {
 
   @ViewChild('mapCanvas', { static: true }) mapElement!: ElementRef;
 
-  ngAfterViewInit() {
+  ngAfterViewInit(): void {
     this.locationService
       .loadLocations()
       .pipe(takeUntilDestroyed(this.destroyRef))
diff --git a/src/app/pages/schedule-filter/schedule-filter.ts b/src/app/pages/schedule-filter/schedule-filter.ts
index 6f519bc13..8cee16558 100644
--- a/src/app/pages/schedule-filter/schedule-filter.ts
+++ b/src/app/pages/schedule-filter/schedule-filter.ts
@@ -82,7 +82,7 @@ export class ScheduleFilterPage {
     });
   }
 
-  ionViewWillEnter() {
+  ionViewWillEnter(): void {
     this.ios.set(this.config.get('mode') === 'ios');
 
     // passed in array of track names that should be excluded (unchecked)
@@ -100,12 +100,12 @@ export class ScheduleFilterPage {
     });
   }
 
-  selectAll(check: boolean) {
+  selectAll(check: boolean): void {
     // set all to checked or unchecked
     this.tracks.update((tracks) => tracks.map((track) => ({ ...track, isChecked: check })));
   }
 
-  applyFilters() {
+  applyFilters(): void {
     // Pass back a new array of track names to exclude
     const excludedTrackNames = this.tracks()
       .filter((c) => !c.isChecked)
@@ -113,7 +113,7 @@ export class ScheduleFilterPage {
     this.dismiss(excludedTrackNames);
   }
 
-  dismiss(data?: string[]) {
+  dismiss(data?: string[]): void {
     // using the injected ModalController this page
     // can "dismiss" itself and pass back data
     this.modalCtrl.dismiss(data);
diff --git a/src/app/pages/schedule/schedule.ts b/src/app/pages/schedule/schedule.ts
index 5e30bb1e8..654de9c80 100644
--- a/src/app/pages/schedule/schedule.ts
+++ b/src/app/pages/schedule/schedule.ts
@@ -110,12 +110,12 @@ export class SchedulePage implements OnInit {
     });
   }
 
-  ngOnInit() {
+  ngOnInit(): void {
     this.updateSchedule();
     this.ios = this.config.get('mode') === 'ios';
   }
 
-  updateSchedule() {
+  updateSchedule(): void {
     // Close any open sliding items when the schedule updates
     if (this.scheduleList) {
       this.scheduleList.closeSlidingItems();
@@ -134,7 +134,7 @@ export class SchedulePage implements OnInit {
       });
   }
 
-  async presentFilter() {
+  async presentFilter(): Promise<void> {
     const modal = await this.modalCtrl.create({
       component: ScheduleFilterPage,
       presentingElement: this.routerOutlet.nativeEl,
@@ -149,7 +149,7 @@ export class SchedulePage implements OnInit {
     }
   }
 
-  async addFavorite(slidingItem: IonItemSliding, sessionData: Session) {
+  async addFavorite(slidingItem: IonItemSliding, sessionData: Session): Promise<void> {
     if (this.user.hasFavorite(sessionData.name)) {
       // Prompt to remove favorite
       this.removeFavorite(slidingItem, sessionData, 'Favorite already added');
@@ -177,7 +177,7 @@ export class SchedulePage implements OnInit {
     }
   }
 
-  async removeFavorite(slidingItem: IonItemSliding, sessionData: Session, title: string) {
+  async removeFavorite(slidingItem: IonItemSliding, sessionData: Session, title: string): Promise<void> {
     const alert = await this.alertCtrl.create({
       header: title,
       message: 'Would you like to remove this session from your favorites?',
@@ -207,7 +207,7 @@ export class SchedulePage implements OnInit {
     await alert.present();
   }
 
-  async openSocial(network: string, fab: IonFab) {
+  async openSocial(network: string, fab: IonFab): Promise<void> {
     const loading = await this.loadingCtrl.create({
       message: `Posting to ${network}`,
       duration: Math.random() * 1000 + 500,
diff --git a/src/app/pages/session-detail/session-detail.ts b/src/app/pages/session-detail/session-detail.ts
index 040f97142..76d2b3b74 100644
--- a/src/app/pages/session-detail/session-detail.ts
+++ b/src/app/pages/session-detail/session-detail.ts
@@ -51,7 +51,7 @@ export class SessionDetailPage {
     addIcons({ shareOutline, starOutline, star, cloudDownload, share });
   }
 
-  ionViewWillEnter() {
+  ionViewWillEnter(): void {
     this.confService.load().subscribe((data) => {
       if (data && data.schedule && data.schedule[0] && data.schedule[0].groups) {
         const sessionId = this.route.snapshot.paramMap.get('sessionId');
@@ -72,15 +72,15 @@ export class SessionDetailPage {
     });
   }
 
-  ionViewDidEnter() {
+  ionViewDidEnter(): void {
     this.defaultHref.set('/app/tabs/schedule');
   }
 
-  sessionClick(item: string) {
+  sessionClick(item: string): void {
     console.log('Clicked', item);
   }
 
-  toggleFavorite() {
+  toggleFavorite(): void {
     const sessionName = this.session()?.name;
     if (!sessionName) {
       return;
@@ -94,7 +94,7 @@ export class SessionDetailPage {
     }
   }
 
-  shareSession() {
+  shareSession(): void {
     console.log('Clicked share session');
   }
 }
diff --git a/src/app/pages/signup/signup.ts b/src/app/pages/signup/signup.ts
index 2321e8f83..4dd72070a 100644
--- a/src/app/pages/signup/signup.ts
+++ b/src/app/pages/signup/signup.ts
@@ -43,7 +43,7 @@ export class SignupPage {
   signup: UserOptions = { username: '', password: '' };
   submitted = false;
 
-  onSignup(form: NgForm) {
+  onSignup(form: NgForm): void {
     this.submitted = true;
 
     if (form.valid) {
diff --git a/src/app/pages/speaker-detail/speaker-detail.ts b/src/app/pages/speaker-detail/speaker-detail.ts
index e20dbcfe2..73265373a 100644
--- a/src/app/pages/speaker-detail/speaker-detail.ts
+++ b/src/app/pages/speaker-detail/speaker-detail.ts
@@ -64,7 +64,7 @@ export class SpeakerDetailPage {
     });
   }
 
-  ionViewWillEnter() {
+  ionViewWillEnter(): void {
     this.confService.load().subscribe((data) => {
       const speakerId = this.route.snapshot.paramMap.get('speakerId');
       if (data && data.speakers) {
@@ -78,11 +78,11 @@ export class SpeakerDetailPage {
     });
   }
 
-  openExternalUrl(url: string) {
+  openExternalUrl(url: string): void {
     window.open(url, '_blank');
   }
 
-  async openSpeakerShare(speaker: any) {
+  async openSpeakerShare(speaker: any): Promise<void> {
     const actionSheet = await this.actionSheetCtrl.create({
       header: 'Share ' + speaker.name,
       buttons: [
@@ -108,7 +108,7 @@ export class SpeakerDetailPage {
     await actionSheet.present();
   }
 
-  async openContact(speaker: Speaker) {
+  async openContact(speaker: Speaker): Promise<void> {
     const mode = 'ios'; // this.config.get('mode');
 
     const actionSheet = await this.actionSheetCtrl.create({
diff --git a/src/app/pages/speaker-list/speaker-list.ts b/src/app/pages/speaker-list/speaker-list.ts
index ca1c560dc..70ff4473b 100644
--- a/src/app/pages/speaker-list/speaker-list.ts
+++ b/src/app/pages/speaker-list/speaker-list.ts
@@ -51,7 +51,7 @@ export class SpeakerListPage {
 
   speakers = signal<Speaker[]>([]);
 
-  ionViewDidEnter() {
+  ionViewDidEnter(): void {
     this.confData.getSpeakers().subscribe((speakers) => {
       this.speakers.set(speakers);
     });
diff --git a/src/app/pages/support/support.ts b/src/app/pages/support/support.ts
index 0186ddb54..214b6a3f2 100644
--- a/src/app/pages/support/support.ts
+++ b/src/app/pages/support/support.ts
@@ -42,7 +42,7 @@ export class SupportPage {
   submitted = false;
   supportMessage: string;
 
-  async ionViewDidEnter() {
+  async ionViewDidEnter(): Promise<void> {
     const toast = await this.toastCtrl.create({
       message: 'This does not actually send a support request.',
       duration: 3000,
@@ -50,7 +50,7 @@ export class SupportPage {
     await toast.present();
   }
 
-  async submit(form: NgForm) {
+  async submit(form: NgForm): Promise<void> {
     this.submitted = true;
 
     if (form.valid) {
diff --git a/src/app/pages/tutorial/tutorial.ts b/src/app/pages/tutorial/tutorial.ts
index 42d7471b5..d4f3c431a 100644
--- a/src/app/pages/tutorial/tutorial.ts
+++ b/src/app/pages/tutorial/tutorial.ts
@@ -25,13 +25,13 @@ export class TutorialPage {
     });
   }
 
-  startApp() {
+  startApp(): void {
     this.router
       .navigateByUrl('/app/tabs/schedule', { replaceUrl: true })
       .then(() => this.storage.set('ion_did_tutorial', true));
   }
 
-  ionViewWillEnter() {
+  ionViewWillEnter(): void {
     this.storage.get('ion_did_tutorial').then((res) => {
       if (res === true) {
         this.router.navigateByUrl('/app/tabs/schedule', { replaceUrl: true });
@@ -41,7 +41,7 @@ export class TutorialPage {
     this.menu.enable(false);
   }
 
-  ionViewWillLeave() {
+  ionViewWillLeave(): void {
     // enable the root left menu when leaving the tutorial page
     this.menu.enable(true);
   }
diff --git a/src/app/providers/check-tutorial.guard.ts b/src/app/providers/check-tutorial.guard.ts
index a68b13cd0..1851ac6f8 100644
--- a/src/app/providers/check-tutorial.guard.ts
+++ b/src/app/providers/check-tutorial.guard.ts
@@ -1,9 +1,10 @@
 import { inject } from '@angular/core';
 import { Router } from '@angular/router';
 import { Storage } from '@ionic/storage-angular';
+import type { Observable } from 'rxjs';
 import { from, map, tap } from 'rxjs';
 
-export const checkTutorialGuard = () => {
+export const checkTutorialGuard = (): Observable<boolean> => {
   const storage = inject(Storage);
   const router = inject(Router);
 
diff --git a/src/app/providers/conference.service.ts b/src/app/providers/conference.service.ts
index 201cb7fe4..7a7f0506c 100644
--- a/src/app/providers/conference.service.ts
+++ b/src/app/providers/conference.service.ts
@@ -1,9 +1,18 @@
 import { HttpClient } from '@angular/common/http';
 import { Injectable, inject } from '@angular/core';
+import type { Observable } from 'rxjs';
 import { of } from 'rxjs';
 import { map } from 'rxjs/operators';
 
-import type { ConferenceData, Group, ScheduleDay, Session, Speaker } from '../interfaces/conference.interfaces';
+import type {
+  ConferenceData,
+  Group,
+  MapLocation,
+  ScheduleDay,
+  Session,
+  Speaker,
+  Track,
+} from '../interfaces/conference.interfaces';
 
 import { UserService } from './user.service';
 
@@ -15,7 +24,7 @@ export class ConferenceService {
   user = inject(UserService);
   data: ConferenceData | null = null;
 
-  load() {
+  load(): Observable<ConferenceData> {
     if (this.data) {
       return of(this.data);
     } else {
@@ -54,7 +63,12 @@ export class ConferenceService {
     return data;
   }
 
-  getTimeline(dayIndex: number, queryText = '', excludeTracks: string[] = [], segment = 'all') {
+  getTimeline(
+    dayIndex: number,
+    queryText = '',
+    excludeTracks: string[] = [],
+    segment = 'all',
+  ): Observable<ScheduleDay> {
     return this.load().pipe(
       map((data: ConferenceData) => {
         const day = data.schedule[dayIndex];
@@ -91,7 +105,7 @@ export class ConferenceService {
     );
   }
 
-  filterSession(session: Session, queryWords: string[], excludeTracks: string[], segment: string) {
+  filterSession(session: Session, queryWords: string[], excludeTracks: string[], segment: string): void {
     let matchesQueryText = false;
     if (queryWords.length) {
       // of any query word is in the session name than it passes the query test
@@ -129,15 +143,15 @@ export class ConferenceService {
     session.hide = !(matchesQueryText && matchesTracks && matchesSegment);
   }
 
-  getSpeakers() {
+  getSpeakers(): Observable<Speaker[]> {
     return this.load().pipe(map((data: ConferenceData) => data.speakers));
   }
 
-  getTracks() {
+  getTracks(): Observable<Track[]> {
     return this.load().pipe(map((data: ConferenceData) => data.tracks));
   }
 
-  getMap() {
+  getMap(): Observable<MapLocation[]> {
     return this.load().pipe(map((data: ConferenceData) => data.map));
   }
 }