diff --git a/packages/core-plugin-api/package.json b/packages/core-plugin-api/package.json
index d676260227..68d5ad68c3 100644
--- a/packages/core-plugin-api/package.json
+++ b/packages/core-plugin-api/package.json
@@ -47,6 +47,7 @@
   },
   "dependencies": {
     "@backstage/config": "workspace:^",
+    "@backstage/errors": "workspace:^",
     "@backstage/types": "workspace:^",
     "@backstage/version-bridge": "workspace:^",
     "@types/react": "^16.13.1 || ^17.0.0",
diff --git a/packages/core-plugin-api/src/apis/system/useApi.tsx b/packages/core-plugin-api/src/apis/system/useApi.tsx
index 03c4fa33ac..2bb1532525 100644
--- a/packages/core-plugin-api/src/apis/system/useApi.tsx
+++ b/packages/core-plugin-api/src/apis/system/useApi.tsx
@@ -17,6 +17,7 @@
 import React, { PropsWithChildren } from 'react';
 import { ApiRef, ApiHolder, TypesToApiRefs } from './types';
 import { useVersionedContext } from '@backstage/version-bridge';
+import { NotImplementedError } from '@backstage/errors';
 
 /**
  * React hook for retrieving {@link ApiHolder}, an API catalog.
@@ -26,12 +27,12 @@ import { useVersionedContext } from '@backstage/version-bridge';
 export function useApiHolder(): ApiHolder {
   const versionedHolder = useVersionedContext<{ 1: ApiHolder }>('api-context');
   if (!versionedHolder) {
-    throw new Error('API context is not available');
+    throw new NotImplementedError('API context is not available');
   }
 
   const apiHolder = versionedHolder.atVersion(1);
   if (!apiHolder) {
-    throw new Error('ApiContext v1 not available');
+    throw new NotImplementedError('ApiContext v1 not available');
   }
   return apiHolder;
 }
@@ -47,7 +48,7 @@ export function useApi<T>(apiRef: ApiRef<T>): T {
 
   const api = apiHolder.get(apiRef);
   if (!api) {
-    throw new Error(`No implementation available for ${apiRef}`);
+    throw new NotImplementedError(`No implementation available for ${apiRef}`);
   }
   return api;
 }
@@ -73,7 +74,9 @@ export function withApis<T extends {}>(apis: TypesToApiRefs<T>) {
 
           const api = apiHolder.get(ref);
           if (!api) {
-            throw new Error(`No implementation available for ${ref}`);
+            throw new NotImplementedError(
+              `No implementation available for ${ref}`,
+            );
           }
           impls[key] = api;
         }
diff --git a/packages/frontend-app-api/src/routing/RouteTracker.test.tsx b/packages/frontend-app-api/src/routing/RouteTracker.test.tsx
index 0e66d0e50d..935449b697 100644
--- a/packages/frontend-app-api/src/routing/RouteTracker.test.tsx
+++ b/packages/frontend-app-api/src/routing/RouteTracker.test.tsx
@@ -211,8 +211,8 @@ describe('RouteTracker', () => {
       action: 'navigate',
       attributes: {},
       context: {
-        extensionId: 'App',
-        pluginId: 'root',
+        extensionId: 'app',
+        pluginId: 'app',
       },
       subject: '/not-routable-extension',
       value: undefined,
@@ -221,8 +221,8 @@ describe('RouteTracker', () => {
       action: 'click',
       attributes: undefined,
       context: {
-        extensionId: 'App',
-        pluginId: 'root',
+        extensionId: 'app',
+        pluginId: 'app',
       },
       subject: 'test',
       value: undefined,
diff --git a/packages/frontend-plugin-api/src/analytics/AnalyticsContext.test.tsx b/packages/frontend-plugin-api/src/analytics/AnalyticsContext.test.tsx
index 8e78bdc8c4..bdfdef3005 100644
--- a/packages/frontend-plugin-api/src/analytics/AnalyticsContext.test.tsx
+++ b/packages/frontend-plugin-api/src/analytics/AnalyticsContext.test.tsx
@@ -35,8 +35,8 @@ describe('AnalyticsContext', () => {
     it('returns default values', () => {
       const { result } = renderHook(() => useAnalyticsContext());
       expect(result.current).toEqual({
-        extensionId: 'App',
-        pluginId: 'root',
+        extensionId: 'app',
+        pluginId: 'app',
       });
     });
   });
@@ -49,8 +49,8 @@ describe('AnalyticsContext', () => {
         </AnalyticsContext>,
       );
 
-      expect(result.getByTestId('extension-id')).toHaveTextContent('App');
-      expect(result.getByTestId('plugin-id')).toHaveTextContent('root');
+      expect(result.getByTestId('extension-id')).toHaveTextContent('app');
+      expect(result.getByTestId('plugin-id')).toHaveTextContent('app');
     });
 
     it('uses provided analytics context', () => {
@@ -60,7 +60,7 @@ describe('AnalyticsContext', () => {
         </AnalyticsContext>,
       );
 
-      expect(result.getByTestId('extension-id')).toHaveTextContent('App');
+      expect(result.getByTestId('extension-id')).toHaveTextContent('app');
       expect(result.getByTestId('plugin-id')).toHaveTextContent('custom');
     });
 
diff --git a/packages/frontend-plugin-api/src/analytics/AnalyticsContext.tsx b/packages/frontend-plugin-api/src/analytics/AnalyticsContext.tsx
index 2c022ad8e9..13047b41d7 100644
--- a/packages/frontend-plugin-api/src/analytics/AnalyticsContext.tsx
+++ b/packages/frontend-plugin-api/src/analytics/AnalyticsContext.tsx
@@ -38,7 +38,7 @@ export const useAnalyticsContext = (): AnalyticsContextValue => {
   if (theContext === undefined) {
     return {
       pluginId: 'app',
-      extensionId: 'App',
+      extensionId: 'app',
     };
   }
 
diff --git a/packages/frontend-plugin-api/src/analytics/useAnalytics.test.tsx b/packages/frontend-plugin-api/src/analytics/useAnalytics.test.tsx
index beb16b1fbb..6dbcc81f11 100644
--- a/packages/frontend-plugin-api/src/analytics/useAnalytics.test.tsx
+++ b/packages/frontend-plugin-api/src/analytics/useAnalytics.test.tsx
@@ -53,8 +53,8 @@ describe('useAnalytics', () => {
         some: 'value',
       },
       context: {
-        extensionId: 'App',
-        pluginId: 'root',
+        extensionId: 'app',
+        pluginId: 'app',
       },
     });
   });
diff --git a/packages/frontend-plugin-api/src/analytics/useAnalytics.tsx b/packages/frontend-plugin-api/src/analytics/useAnalytics.tsx
index f3b5998de4..397906d1d1 100644
--- a/packages/frontend-plugin-api/src/analytics/useAnalytics.tsx
+++ b/packages/frontend-plugin-api/src/analytics/useAnalytics.tsx
@@ -23,8 +23,11 @@ import { Tracker } from './Tracker';
 function useAnalyticsApi(): AnalyticsApi {
   try {
     return useApi(analyticsApiRef);
-  } catch {
-    return { captureEvent: () => {} };
+  } catch (error) {
+    if (error.name === 'NotImplementedError') {
+      return { captureEvent: () => {} };
+    }
+    throw error;
   }
 }
 
diff --git a/plugins/analytics-module-ga4/src/apis/implementations/AnalyticsApi/GoogleAnalytics4.test.ts b/plugins/analytics-module-ga4/src/apis/implementations/AnalyticsApi/GoogleAnalytics4.test.ts
index 5bae530b2b..93a6e6fe6a 100644
--- a/plugins/analytics-module-ga4/src/apis/implementations/AnalyticsApi/GoogleAnalytics4.test.ts
+++ b/plugins/analytics-module-ga4/src/apis/implementations/AnalyticsApi/GoogleAnalytics4.test.ts
@@ -493,8 +493,8 @@ describe('GoogleAnalytics4', () => {
     });
   });
 
-  describe('Backward compatibility', () => {
-    it('fallback category for legacy context extension property', () => {
+  describe('api backward compatibility', () => {
+    it('continue working with legacy App category', () => {
       const api = GoogleAnalytics4.fromConfig(basicValidConfig);
 
       expect(api.captureEvent).toBeDefined();
@@ -512,6 +512,24 @@ describe('GoogleAnalytics4', () => {
       });
     });
 
+    it('use lowercase app as the new default category', () => {
+      const api = GoogleAnalytics4.fromConfig(basicValidConfig);
+
+      expect(api.captureEvent).toBeDefined();
+
+      api.captureEvent({
+        action: 'navigate',
+        subject: '/',
+        context: { ...context, extensionId: '', extension: '' },
+      });
+
+      expect(fnEvent).toHaveBeenCalledWith('page_view', {
+        action: 'page_view',
+        label: '/',
+        category: 'app',
+      });
+    });
+
     it('prioritize new context extension id over old extension property', () => {
       const api = GoogleAnalytics4.fromConfig(basicValidConfig);
 
@@ -520,13 +538,13 @@ describe('GoogleAnalytics4', () => {
       api.captureEvent({
         action: 'navigate',
         subject: '/',
-        context: { ...context, extensionId: 'App', extension: '' },
+        context: { ...context, extensionId: 'app', extension: '' },
       });
 
       expect(fnEvent).toHaveBeenCalledWith('page_view', {
         action: 'page_view',
         label: '/',
-        category: 'App',
+        category: 'app',
       });
     });
   });
diff --git a/plugins/analytics-module-ga4/src/apis/implementations/AnalyticsApi/GoogleAnalytics4.ts b/plugins/analytics-module-ga4/src/apis/implementations/AnalyticsApi/GoogleAnalytics4.ts
index 3d2e633962..1f4cbfeee5 100644
--- a/plugins/analytics-module-ga4/src/apis/implementations/AnalyticsApi/GoogleAnalytics4.ts
+++ b/plugins/analytics-module-ga4/src/apis/implementations/AnalyticsApi/GoogleAnalytics4.ts
@@ -171,9 +171,10 @@ export class GoogleAnalytics4 implements AnalyticsApi, NewAnalyticsApi {
     }
 
     const extensionId = context.extensionId || context.extension;
-    const category = extensionId ? String(extensionId) : 'App';
+    const category = extensionId ? String(extensionId) : 'app';
 
-    if (action === 'navigate' && category === 'App') {
+    // The legacy default extension was 'App' and the new one is 'app'
+    if (action === 'navigate' && category.toLocaleLowerCase() === 'app') {
       this.capture.event(
         {
           category,
diff --git a/yarn.lock b/yarn.lock
index 5f26cb9a82..efac8bb495 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3896,6 +3896,7 @@ __metadata:
     "@backstage/cli": "workspace:^"
     "@backstage/config": "workspace:^"
     "@backstage/core-app-api": "workspace:^"
+    "@backstage/errors": "workspace:^"
     "@backstage/test-utils": "workspace:^"
     "@backstage/types": "workspace:^"
     "@backstage/version-bridge": "workspace:^"