diff --git a/adev/src/content/tutorials/first-app/steps/10-routing/src/app/housing.service.ts b/adev/src/content/tutorials/first-app/steps/10-routing/src/app/housing.service.ts
index 2c0a8c0247e7..dc26f65b756b 100644
--- a/adev/src/content/tutorials/first-app/steps/10-routing/src/app/housing.service.ts
+++ b/adev/src/content/tutorials/first-app/steps/10-routing/src/app/housing.service.ts
@@ -1,8 +1,6 @@
-import {Injectable} from '@angular/core';
+import {Service} from '@angular/core';
 import {HousingLocationInfo} from './housinglocation';
-@Injectable({
-  providedIn: 'root',
-})
+@Service()
 export class HousingService {
   readonly baseUrl = 'https://angular.dev/assets/images/tutorials/common';
 
diff --git a/adev/src/content/tutorials/first-app/steps/11-details-page/src/app/housing.service.ts b/adev/src/content/tutorials/first-app/steps/11-details-page/src/app/housing.service.ts
index 609b19afc385..9bbb58abafa3 100644
--- a/adev/src/content/tutorials/first-app/steps/11-details-page/src/app/housing.service.ts
+++ b/adev/src/content/tutorials/first-app/steps/11-details-page/src/app/housing.service.ts
@@ -1,9 +1,7 @@
-import {Injectable} from '@angular/core';
+import {Service} from '@angular/core';
 import {HousingLocationInfo} from './housinglocation';
 
-@Injectable({
-  providedIn: 'root',
-})
+@Service()
 export class HousingService {
   readonly baseUrl = 'https://angular.dev/assets/images/tutorials/common';
 
diff --git a/adev/src/content/tutorials/first-app/steps/12-forms/src/app/housing.service.ts b/adev/src/content/tutorials/first-app/steps/12-forms/src/app/housing.service.ts
index 609b19afc385..9bbb58abafa3 100644
--- a/adev/src/content/tutorials/first-app/steps/12-forms/src/app/housing.service.ts
+++ b/adev/src/content/tutorials/first-app/steps/12-forms/src/app/housing.service.ts
@@ -1,9 +1,7 @@
-import {Injectable} from '@angular/core';
+import {Service} from '@angular/core';
 import {HousingLocationInfo} from './housinglocation';
 
-@Injectable({
-  providedIn: 'root',
-})
+@Service()
 export class HousingService {
   readonly baseUrl = 'https://angular.dev/assets/images/tutorials/common';
 
diff --git a/adev/src/content/tutorials/first-app/steps/13-search/src/app/housing.service.ts b/adev/src/content/tutorials/first-app/steps/13-search/src/app/housing.service.ts
index 96abae0c068a..8960dbb7cbb8 100644
--- a/adev/src/content/tutorials/first-app/steps/13-search/src/app/housing.service.ts
+++ b/adev/src/content/tutorials/first-app/steps/13-search/src/app/housing.service.ts
@@ -1,9 +1,7 @@
-import {Injectable} from '@angular/core';
+import {Service} from '@angular/core';
 import {HousingLocationInfo} from './housinglocation';
 
-@Injectable({
-  providedIn: 'root',
-})
+@Service()
 export class HousingService {
   readonly baseUrl = 'https://angular.dev/assets/images/tutorials/common';
 
diff --git a/adev/src/content/tutorials/first-app/steps/14-http/src-final/app/housing.service.ts b/adev/src/content/tutorials/first-app/steps/14-http/src-final/app/housing.service.ts
index 23c44f72f19b..1e6670da3395 100644
--- a/adev/src/content/tutorials/first-app/steps/14-http/src-final/app/housing.service.ts
+++ b/adev/src/content/tutorials/first-app/steps/14-http/src-final/app/housing.service.ts
@@ -1,9 +1,7 @@
-import {Injectable} from '@angular/core';
+import {Service} from '@angular/core';
 import {HousingLocationInfo} from './housinglocation';
 
-@Injectable({
-  providedIn: 'root',
-})
+@Service()
 export class HousingService {
   url = 'http://localhost:3000/locations';
 
diff --git a/adev/src/content/tutorials/first-app/steps/14-http/src/app/housing.service.ts b/adev/src/content/tutorials/first-app/steps/14-http/src/app/housing.service.ts
index c339ecfdd161..635fa9eafd07 100644
--- a/adev/src/content/tutorials/first-app/steps/14-http/src/app/housing.service.ts
+++ b/adev/src/content/tutorials/first-app/steps/14-http/src/app/housing.service.ts
@@ -1,9 +1,7 @@
-import {Injectable} from '@angular/core';
+import {Service} from '@angular/core';
 import {HousingLocationInfo} from './housinglocation';
 
-@Injectable({
-  providedIn: 'root',
-})
+@Service()
 export class HousingService {
   readonly baseUrl = 'https://angular.dev/assets/images/tutorials/common';
 
diff --git a/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/README.md b/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/README.md
index 7dcb21eebaa8..cf07a3f0dab8 100644
--- a/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/README.md
+++ b/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/README.md
@@ -13,7 +13,7 @@ Add readonly and computed signals to make the cart state reactive in `cart-store
 
 ```ts
 // Add the computed import
-import {Injectable, signal, computed} from '@angular/core';
+import {Service, signal, computed} from '@angular/core';
 
 // Then add these signals to the class:
 
diff --git a/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/answer/src/app/cart-store.ts b/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/answer/src/app/cart-store.ts
index 2a4bd9fdb06d..279cb6908b70 100644
--- a/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/answer/src/app/cart-store.ts
+++ b/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/answer/src/app/cart-store.ts
@@ -1,9 +1,7 @@
-import {Injectable, signal, computed} from '@angular/core';
+import {Service, signal, computed} from '@angular/core';
 import {CartItem} from './cart-types';
 
-@Injectable({
-  providedIn: 'root',
-})
+@Service()
 export class CartStore {
   private items = signal<CartItem[]>([]);
 
diff --git a/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/src/app/cart-store.ts b/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/src/app/cart-store.ts
index 5325d2392d3a..bb2aa92fb890 100644
--- a/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/src/app/cart-store.ts
+++ b/adev/src/content/tutorials/signals/steps/7-using-signals-with-services/src/app/cart-store.ts
@@ -1,10 +1,8 @@
 // TODO: Import computed from @angular/core
-import {Injectable, signal} from '@angular/core';
+import {Service, signal} from '@angular/core';
 import {CartItem} from './cart-types';
 
-@Injectable({
-  providedIn: 'root',
-})
+@Service()
 export class CartStore {
   private items = signal<CartItem[]>([]);