diff --git a/CHANGELOG.md b/CHANGELOG.md
index 31ebe5ce2..7947be561 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Improved the sorting to be case-insensitive in the account selector component
+- Refactored the services to use the `@Service()` decorator of _Angular_
 
 ## 3.55.0 - 2026-08-19
 
diff --git a/apps/client/src/app/adapter/custom-date-adapter.ts b/apps/client/src/app/adapter/custom-date-adapter.ts
index a2700f4ed..5383d0ca2 100644
--- a/apps/client/src/app/adapter/custom-date-adapter.ts
+++ b/apps/client/src/app/adapter/custom-date-adapter.ts
@@ -1,9 +1,10 @@
 import { getDateFormatString } from '@ghostfolio/common/helper';
 
-import { inject } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import { MAT_DATE_LOCALE, NativeDateAdapter } from '@angular/material/core';
 import { addYears, format, getYear, parse } from 'date-fns';
 
+@Service({ autoProvided: false })
 export class CustomDateAdapter extends NativeDateAdapter {
   public override locale = inject<string>(MAT_DATE_LOCALE);
 
diff --git a/apps/client/src/app/components/admin-market-data/admin-market-data.service.ts b/apps/client/src/app/components/admin-market-data/admin-market-data.service.ts
index c4d45b7f0..73ea1e86f 100644
--- a/apps/client/src/app/components/admin-market-data/admin-market-data.service.ts
+++ b/apps/client/src/app/components/admin-market-data/admin-market-data.service.ts
@@ -3,15 +3,13 @@ import { AssetProfileIdentifier } from '@ghostfolio/common/interfaces';
 import { NotificationService } from '@ghostfolio/ui/notifications';
 import { AdminService } from '@ghostfolio/ui/services';
 
-import { Injectable } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import { EMPTY, Subject, catchError, finalize, forkJoin } from 'rxjs';
 
-@Injectable()
+@Service({ autoProvided: false })
 export class AdminMarketDataService {
-  public constructor(
-    private adminService: AdminService,
-    private notificationService: NotificationService
-  ) {}
+  private readonly adminService = inject(AdminService);
+  private readonly notificationService = inject(NotificationService);
 
   public deleteAssetProfile({ dataSource, symbol }: AssetProfileIdentifier) {
     const assetProfileDeleted = new Subject<void>();
diff --git a/apps/client/src/app/core/auth.guard.ts b/apps/client/src/app/core/auth.guard.ts
index 6ac3417db..91a14d135 100644
--- a/apps/client/src/app/core/auth.guard.ts
+++ b/apps/client/src/app/core/auth.guard.ts
@@ -3,7 +3,7 @@ import { UserService } from '@ghostfolio/client/services/user/user.service';
 import { internalRoutes, publicRoutes } from '@ghostfolio/common/routes/routes';
 import { DataService } from '@ghostfolio/ui/services';
 
-import { inject, Injectable } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import {
   ActivatedRouteSnapshot,
   Router,
@@ -12,7 +12,7 @@ import {
 import { EMPTY } from 'rxjs';
 import { catchError } from 'rxjs/operators';
 
-@Injectable({ providedIn: 'root' })
+@Service()
 export class AuthGuard {
   private readonly dataService = inject(DataService);
   private readonly router = inject(Router);
diff --git a/apps/client/src/app/core/auth.interceptor.ts b/apps/client/src/app/core/auth.interceptor.ts
index 9c06a11d5..04be15478 100644
--- a/apps/client/src/app/core/auth.interceptor.ts
+++ b/apps/client/src/app/core/auth.interceptor.ts
@@ -13,10 +13,10 @@ import {
   HttpInterceptor,
   HttpRequest
 } from '@angular/common/http';
-import { inject, Injectable } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import { Observable } from 'rxjs';
 
-@Injectable()
+@Service({ autoProvided: false })
 export class AuthInterceptor implements HttpInterceptor {
   private readonly impersonationStorageService = inject(
     ImpersonationStorageService
diff --git a/apps/client/src/app/core/http-response.interceptor.ts b/apps/client/src/app/core/http-response.interceptor.ts
index 42c5b3ffc..f5735fc11 100644
--- a/apps/client/src/app/core/http-response.interceptor.ts
+++ b/apps/client/src/app/core/http-response.interceptor.ts
@@ -14,7 +14,7 @@ import {
   HttpInterceptor,
   HttpRequest
 } from '@angular/common/http';
-import { inject, Injectable } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import {
   MatSnackBar,
   MatSnackBarRef,
@@ -26,7 +26,7 @@ import ms from 'ms';
 import { Observable, throwError } from 'rxjs';
 import { catchError } from 'rxjs/operators';
 
-@Injectable()
+@Service({ autoProvided: false })
 export class HttpResponseInterceptor implements HttpInterceptor {
   private readonly info: InfoItem;
   private snackBarRef: MatSnackBarRef<TextOnlySnackBar> | undefined;
diff --git a/apps/client/src/app/core/language.service.ts b/apps/client/src/app/core/language.service.ts
deleted file mode 100644
index ebd0e21dc..000000000
--- a/apps/client/src/app/core/language.service.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-import { Injectable } from '@angular/core';
-
-@Injectable()
-export class LanguageService {}
diff --git a/apps/client/src/app/core/layout.service.ts b/apps/client/src/app/core/layout.service.ts
index 2624c4dd6..afb7161d6 100644
--- a/apps/client/src/app/core/layout.service.ts
+++ b/apps/client/src/app/core/layout.service.ts
@@ -1,24 +1,22 @@
 import { NotificationService } from '@ghostfolio/ui/notifications';
 
-import { Injectable } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import { DeviceDetectorService } from 'ngx-device-detector';
 import { Observable, Subject } from 'rxjs';
 
-@Injectable({
-  providedIn: 'root'
-})
+@Service()
 export class LayoutService {
   public static readonly DEFAULT_NOTIFICATION_MAX_WIDTH = '50rem';
   public static readonly DEFAULT_NOTIFICATION_WIDTH = '75vw';
 
-  public shouldReloadContent$: Observable<void>;
+  public readonly shouldReloadContent$: Observable<void>;
 
-  private shouldReloadSubject = new Subject<void>();
+  private readonly shouldReloadSubject = new Subject<void>();
 
-  public constructor(
-    private deviceDetectorService: DeviceDetectorService,
-    private notificationService: NotificationService
-  ) {
+  private readonly deviceDetectorService = inject(DeviceDetectorService);
+  private readonly notificationService = inject(NotificationService);
+
+  public constructor() {
     this.shouldReloadContent$ = this.shouldReloadSubject.asObservable();
 
     const deviceType = this.deviceDetectorService.getDeviceInfo().deviceType;
diff --git a/apps/client/src/app/core/module-preload.service.ts b/apps/client/src/app/core/module-preload.service.ts
index 85d9c5e33..4f9290ede 100644
--- a/apps/client/src/app/core/module-preload.service.ts
+++ b/apps/client/src/app/core/module-preload.service.ts
@@ -1,8 +1,8 @@
-import { Injectable } from '@angular/core';
+import { Service } from '@angular/core';
 import { PreloadingStrategy, Route } from '@angular/router';
 import { Observable, of } from 'rxjs';
 
-@Injectable()
+@Service({ autoProvided: false })
 export class ModulePreloadService implements PreloadingStrategy {
   /**
    * Preloads all lazy loading modules with the attribute 'preload' set to true
diff --git a/apps/client/src/app/services/cache.service.ts b/apps/client/src/app/services/cache.service.ts
index 69a85f926..5472f9a5c 100644
--- a/apps/client/src/app/services/cache.service.ts
+++ b/apps/client/src/app/services/cache.service.ts
@@ -1,11 +1,9 @@
 import { HttpClient } from '@angular/common/http';
-import { Injectable } from '@angular/core';
+import { inject, Service } from '@angular/core';
 
-@Injectable({
-  providedIn: 'root'
-})
+@Service()
 export class CacheService {
-  public constructor(private http: HttpClient) {}
+  private readonly http = inject(HttpClient);
 
   public flush() {
     return this.http.post<any>(`/api/v1/cache/flush`, {});
diff --git a/apps/client/src/app/services/ics/ics.service.ts b/apps/client/src/app/services/ics/ics.service.ts
index a3235380e..d97b427c9 100644
--- a/apps/client/src/app/services/ics/ics.service.ts
+++ b/apps/client/src/app/services/ics/ics.service.ts
@@ -1,13 +1,11 @@
 import { capitalize } from '@ghostfolio/common/helper';
 import { ExportResponse } from '@ghostfolio/common/interfaces';
 
-import { Injectable } from '@angular/core';
+import { Service } from '@angular/core';
 import { Type } from '@prisma/client';
 import { format, parseISO } from 'date-fns';
 
-@Injectable({
-  providedIn: 'root'
-})
+@Service()
 export class IcsService {
   private readonly ICS_DATE_FORMAT = 'yyyyMMdd';
   private readonly ICS_LINE_BREAK = '\r\n';
diff --git a/apps/client/src/app/services/impersonation-storage.service.ts b/apps/client/src/app/services/impersonation-storage.service.ts
index fb101e220..1cbba6444 100644
--- a/apps/client/src/app/services/impersonation-storage.service.ts
+++ b/apps/client/src/app/services/impersonation-storage.service.ts
@@ -1,11 +1,9 @@
-import { Injectable } from '@angular/core';
+import { Service } from '@angular/core';
 import { BehaviorSubject } from 'rxjs';
 
 export const IMPERSONATION_KEY = 'impersonationId';
 
-@Injectable({
-  providedIn: 'root'
-})
+@Service()
 export class ImpersonationStorageService {
   private hasImpersonationChangeSubject = new BehaviorSubject<string | null>(
     this.getId()
diff --git a/apps/client/src/app/services/import-activities.service.ts b/apps/client/src/app/services/import-activities.service.ts
index b73676252..5c06b0e13 100644
--- a/apps/client/src/app/services/import-activities.service.ts
+++ b/apps/client/src/app/services/import-activities.service.ts
@@ -13,16 +13,14 @@ import {
 import { Activity } from '@ghostfolio/common/interfaces';
 
 import { HttpClient } from '@angular/common/http';
-import { inject, Injectable } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import { Account, DataSource, Type as ActivityType } from '@prisma/client';
 import { isFinite, isNumber, isString } from 'lodash';
 import { parse as csvToJson } from 'papaparse';
 import { firstValueFrom } from 'rxjs';
 import { v4 as uuidv4 } from 'uuid';
 
-@Injectable({
-  providedIn: 'root'
-})
+@Service()
 export class ImportActivitiesService {
   private static ACCOUNT_KEYS = ['account', 'accountid'];
   private static COMMENT_KEYS = ['comment', 'note'];
diff --git a/apps/client/src/app/services/page-title.strategy.ts b/apps/client/src/app/services/page-title.strategy.ts
index ce04a0af8..ad4a5bdce 100644
--- a/apps/client/src/app/services/page-title.strategy.ts
+++ b/apps/client/src/app/services/page-title.strategy.ts
@@ -1,16 +1,14 @@
-import { Injectable } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import { Title } from '@angular/platform-browser';
 import { RouterStateSnapshot, TitleStrategy } from '@angular/router';
 
-@Injectable()
+@Service({ autoProvided: false })
 export class PageTitleStrategy extends TitleStrategy {
   private static readonly DEFAULT_TITLE =
     'Ghostfolio – Open Source Wealth Management Software';
   private static readonly DEFAULT_TITLE_SHORT = 'Ghostfolio';
 
-  public constructor(private readonly title: Title) {
-    super();
-  }
+  private readonly title = inject(Title);
 
   public override updateTitle(routerState: RouterStateSnapshot) {
     const title = this.buildTitle(routerState);
diff --git a/apps/client/src/app/services/settings-storage.service.ts b/apps/client/src/app/services/settings-storage.service.ts
index 681552cf7..095c11587 100644
--- a/apps/client/src/app/services/settings-storage.service.ts
+++ b/apps/client/src/app/services/settings-storage.service.ts
@@ -1,12 +1,10 @@
-import { Injectable } from '@angular/core';
+import { Service } from '@angular/core';
 
 export const KEY_RANGE = 'range';
 export const KEY_STAY_SIGNED_IN = 'staySignedIn';
 export const KEY_TOKEN = 'auth-token';
 
-@Injectable({
-  providedIn: 'root'
-})
+@Service()
 export class SettingsStorageService {
   public getSetting(aKey: string): string | null {
     return window.localStorage.getItem(aKey);
diff --git a/apps/client/src/app/services/token-storage.service.ts b/apps/client/src/app/services/token-storage.service.ts
index b29fd207b..fe36043d3 100644
--- a/apps/client/src/app/services/token-storage.service.ts
+++ b/apps/client/src/app/services/token-storage.service.ts
@@ -1,10 +1,8 @@
-import { Injectable } from '@angular/core';
+import { Service } from '@angular/core';
 
 import { KEY_TOKEN } from './settings-storage.service';
 
-@Injectable({
-  providedIn: 'root'
-})
+@Service()
 export class TokenStorageService {
   public getToken(): string | null {
     return (
diff --git a/apps/client/src/app/services/user/user.service.ts b/apps/client/src/app/services/user/user.service.ts
index d58f77c3e..38e9bebc9 100644
--- a/apps/client/src/app/services/user/user.service.ts
+++ b/apps/client/src/app/services/user/user.service.ts
@@ -3,7 +3,7 @@ import { Filter, User } from '@ghostfolio/common/interfaces';
 import { hasPermission, permissions } from '@ghostfolio/common/permissions';
 
 import { HttpClient } from '@angular/common/http';
-import { computed, DestroyRef, inject, Injectable } from '@angular/core';
+import { computed, DestroyRef, inject, Service } from '@angular/core';
 import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 import { MatDialog } from '@angular/material/dialog';
 import { ObservableStore } from '@codewithdan/observable-store';
@@ -18,9 +18,7 @@ import { GfSubscriptionInterstitialDialogComponent } from '../../components/subs
 import { UserStoreActions } from './user-store.actions';
 import { UserStoreState } from './user-store.state';
 
-@Injectable({
-  providedIn: 'root'
-})
+@Service()
 export class UserService extends ObservableStore<UserStoreState> {
   private readonly deviceType = computed(
     () => this.deviceDetectorService.deviceInfo().deviceType
diff --git a/apps/client/src/app/services/web-authn.service.ts b/apps/client/src/app/services/web-authn.service.ts
index 24eee5dc1..b769e8506 100644
--- a/apps/client/src/app/services/web-authn.service.ts
+++ b/apps/client/src/app/services/web-authn.service.ts
@@ -6,7 +6,7 @@ import {
 } from '@ghostfolio/common/interfaces';
 
 import { HttpClient } from '@angular/common/http';
-import { inject, Injectable } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import {
   startAuthentication,
   startRegistration
@@ -14,9 +14,7 @@ import {
 import { of } from 'rxjs';
 import { catchError, switchMap, tap } from 'rxjs/operators';
 
-@Injectable({
-  providedIn: 'root'
-})
+@Service()
 export class WebAuthnService {
   private static readonly WEB_AUTH_N_DEVICE_ID = 'WEB_AUTH_N_DEVICE_ID';
 
diff --git a/apps/client/src/main.ts b/apps/client/src/main.ts
index 3e80df9c7..159c2a7c9 100644
--- a/apps/client/src/main.ts
+++ b/apps/client/src/main.ts
@@ -4,7 +4,6 @@ import { registerChartConfiguration } from '@ghostfolio/ui/chart';
 import { GF_ENVIRONMENT } from '@ghostfolio/ui/environment';
 import { GfNotificationModule } from '@ghostfolio/ui/notifications';
 
-import { Platform } from '@angular/cdk/platform';
 import {
   provideHttpClient,
   withInterceptorsFromDi
@@ -17,7 +16,6 @@ import {
 import {
   DateAdapter,
   MAT_DATE_FORMATS,
-  MAT_DATE_LOCALE,
   MatNativeDateModule
 } from '@angular/material/core';
 import { MatSnackBarModule } from '@angular/material/snack-bar';
@@ -35,7 +33,6 @@ import { GfAppComponent } from './app/app.component';
 import { routes } from './app/app.routes';
 import { authInterceptorProviders } from './app/core/auth.interceptor';
 import { httpResponseInterceptorProviders } from './app/core/http-response.interceptor';
-import { LanguageService } from './app/core/language.service';
 import { ModulePreloadService } from './app/core/module-preload.service';
 import { PageTitleStrategy } from './app/services/page-title.strategy';
 import { environment } from './environments/environment';
@@ -44,8 +41,7 @@ import { environment } from './environments/environment';
   const response = await fetch('/api/v1/info');
   const info: InfoResponse = await response.json();
   const utmSource = window.localStorage.getItem('utm_source') as
-    | 'ios'
-    | 'trusted-web-activity';
+    'ios' | 'trusted-web-activity';
 
   info.globalPermissions = filterGlobalPermissions(
     info.globalPermissions,
@@ -79,7 +75,6 @@ import { environment } from './environments/environment';
           registrationStrategy: 'registerImmediately'
         })
       ),
-      LanguageService,
       ModulePreloadService,
       provideHttpClient(withInterceptorsFromDi()),
       provideIonicAngular(),
@@ -87,7 +82,6 @@ import { environment } from './environments/environment';
       provideNgxSkeletonLoader(),
       provideZoneChangeDetection(),
       {
-        deps: [LanguageService, MAT_DATE_LOCALE, Platform],
         provide: DateAdapter,
         useClass: CustomDateAdapter
       },
diff --git a/libs/ui/src/lib/entity-logo/entity-logo-image-source.service.ts b/libs/ui/src/lib/entity-logo/entity-logo-image-source.service.ts
index db916a34f..dc937e6b9 100644
--- a/libs/ui/src/lib/entity-logo/entity-logo-image-source.service.ts
+++ b/libs/ui/src/lib/entity-logo/entity-logo-image-source.service.ts
@@ -1,11 +1,10 @@
 import { AssetProfileIdentifier } from '@ghostfolio/common/interfaces';
 
-import { Injectable } from '@angular/core';
+import { Service } from '@angular/core';
 
-@Injectable({
-  // Required to allow mocking in Storybook
-  providedIn: 'root'
-})
+// Must stay auto-provided: several table stories render gf-entity-logo
+// without providing an override and resolve this from the root injector
+@Service()
 export class EntityLogoImageSourceService {
   public getLogoUrlByAssetProfileIdentifier({
     dataSource,
diff --git a/libs/ui/src/lib/fire-calculator/fire-calculator.service.ts b/libs/ui/src/lib/fire-calculator/fire-calculator.service.ts
index 848a9efa4..482aee2d5 100644
--- a/libs/ui/src/lib/fire-calculator/fire-calculator.service.ts
+++ b/libs/ui/src/lib/fire-calculator/fire-calculator.service.ts
@@ -1,7 +1,7 @@
-import { Injectable } from '@angular/core';
+import { Service } from '@angular/core';
 import { Big } from 'big.js';
 
-@Injectable()
+@Service({ autoProvided: false })
 export class FireCalculatorService {
   private readonly COMPOUND_PERIOD = 12;
 
diff --git a/libs/ui/src/lib/notifications/notification.service.ts b/libs/ui/src/lib/notifications/notification.service.ts
index 389f52180..b0758b576 100644
--- a/libs/ui/src/lib/notifications/notification.service.ts
+++ b/libs/ui/src/lib/notifications/notification.service.ts
@@ -1,7 +1,7 @@
 import { ConfirmationDialogType } from '@ghostfolio/common/enums';
 import { translate } from '@ghostfolio/ui/i18n';
 
-import { inject, Injectable } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import { MatDialog } from '@angular/material/dialog';
 import { isFunction } from 'lodash';
 
@@ -14,7 +14,7 @@ import {
 } from './interfaces/interfaces';
 import { GfPromptDialogComponent } from './prompt-dialog/prompt-dialog.component';
 
-@Injectable()
+@Service({ autoProvided: false })
 export class NotificationService {
   private dialogMaxWidth: string;
   private dialogWidth: string;
diff --git a/libs/ui/src/lib/services/admin.service.ts b/libs/ui/src/lib/services/admin.service.ts
index a1735f9de..aa048faaf 100644
--- a/libs/ui/src/lib/services/admin.service.ts
+++ b/libs/ui/src/lib/services/admin.service.ts
@@ -24,14 +24,12 @@ import { DateRange } from '@ghostfolio/common/types';
 import { GF_ENVIRONMENT } from '@ghostfolio/ui/environment';
 
 import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http';
-import { Injectable, inject } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import { AssetProfileSplit, MarketData, Platform } from '@prisma/client';
 import { JobStatus } from 'bull';
 import { isNumber } from 'lodash';
 
-@Injectable({
-  providedIn: 'root'
-})
+@Service()
 export class AdminService {
   private readonly environment = inject(GF_ENVIRONMENT);
   private readonly http = inject(HttpClient);
diff --git a/libs/ui/src/lib/services/data.service.ts b/libs/ui/src/lib/services/data.service.ts
index 7081f9b2c..fb9376041 100644
--- a/libs/ui/src/lib/services/data.service.ts
+++ b/libs/ui/src/lib/services/data.service.ts
@@ -66,7 +66,7 @@ import type {
 import { translate } from '@ghostfolio/ui/i18n';
 
 import { HttpClient, HttpParams } from '@angular/common/http';
-import { Injectable, inject } from '@angular/core';
+import { inject, Service } from '@angular/core';
 import { SortDirection } from '@angular/material/sort';
 import { utc } from '@date-fns/utc';
 import {
@@ -85,9 +85,7 @@ import { cloneDeep, groupBy, isNumber } from 'lodash';
 import { Observable } from 'rxjs';
 import { map } from 'rxjs/operators';
 
-@Injectable({
-  providedIn: 'root'
-})
+@Service()
 export class DataService {
   private readonly http = inject(HttpClient);