managarten/apps-archived/memoro/apps/mobile/POSTHOG_REMOVAL.md

PostHog Removal Summary

Overview

PostHog analytics has been completely removed from the Memoro mobile app. Analytics tracking is now disabled for mobile platforms (iOS/Android), while web continues to use Umami.

What Was Removed

Dependencies

• ❌ posthog-react-native package (from package.json)

Files Deleted

• ❌ features/analytics/services/analyticsService.ts - PostHog service
• ❌ features/analytics/services/postHogManager.ts - PostHog manager
• ❌ B2B_ANALYTICS_DISABLE.md - Documentation (obsolete)
• ❌ REMOVE_TEST_ALERTS.md - Test alerts documentation (obsolete)

Code Changes

1. AuthContext (features/auth/contexts/AuthContext.tsx)

• Removed PostHog imports
• Removed PostHog initialization on app startup
• Removed PostHog initialization on sign in
• Removed PostHog initialization on sign up
• Removed PostHog reset on sign out
• Removed all test alerts
• Removed useAnalytics() hook usage

2. MultiPlatformAnalytics (features/analytics/services/multiPlatformAnalytics.ts)

• Removed PostHog manager import
• Mobile analytics calls are now no-ops
• Web continues to use Umami

3. Analytics Index (features/analytics/index.ts)

• Removed PostHog manager exports
• Removed analyticsService export

4. Feature Flags (features/analytics/hooks/useFeatureFlag.ts)

• useFeatureFlag() now always returns false
• useFeatureFlags() now always returns {}
• Kept for backward compatibility

5. Config (config.ts)

• Removed POSTHOG_KEY configuration
• Removed POSTHOG_HOST configuration

6. Layout (app/_layout.tsx)

• Updated comment to reflect PostHog removal

Current State

Mobile (iOS/Android)

• ✅ No analytics tracking
• ✅ All useAnalytics() calls are no-ops
• ✅ All feature flag checks return false
• ✅ No data sent to analytics services
• ✅ RevenueCat still works (B2B disable logic intact)

Web

• ✅ Umami analytics only
• ✅ All analytics tracking functional
• ✅ No changes to web analytics behavior

Backward Compatibility

All analytics hooks remain functional:

// These still work but do nothing on mobile
const { track, identify, screen, reset } = useAnalytics();
track('event'); // No-op on mobile, works on web
identify('userId'); // No-op on mobile, works on web

// Feature flags always return false/empty
const isEnabled = useFeatureFlag('my-flag'); // Always false
const flags = useFeatureFlags(); // Always {}

Next Steps

If you want to re-enable analytics:

1. Choose a new analytics provider (e.g., Amplitude, Mixpanel, etc.)
2. Install the package:

   npm install [new-analytics-package]
   

3. Create new service file:
   • features/analytics/services/analyticsService.ts
4. Update multiPlatformAnalytics.ts to use new service
5. Add initialization to AuthContext (optional, if needed)

If you want to keep analytics disabled:

• ✅ No action needed - current state is stable
• ✅ App continues to function normally
• ✅ All code is backward compatible

Cleanup

To clean up your environment:

1. Remove node_modules and reinstall:

   rm -rf node_modules package-lock.json
   npm install
   

2. Remove PostHog from environment files (optional):

   • .env.dev
   • .env.prod
   • .env.example

   Remove these lines:

   EXPO_PUBLIC_POSTHOG_KEY=...
   EXPO_PUBLIC_POSTHOG_HOST=...
   

Testing

Verify PostHog is completely removed:

# Search for any remaining PostHog references
git grep -i posthog

# Should only show this file and maybe some comments/docs

Migration Notes

• No breaking changes - all analytics hooks still exist
• No data loss - RevenueCat and other services unaffected
• No user impact - app functionality unchanged
• Web analytics - continues to work with Umami

Commit Details

Commit: fd18430 - 🔥 refactor: remove PostHog analytics completely from the app

Stats:

• 11 files changed
• 29 insertions
• 925 deletions
• Net reduction: ~900 lines of code

Files affected:

• B2B_ANALYTICS_DISABLE.md (deleted)
• REMOVE_TEST_ALERTS.md (deleted)
• app/_layout.tsx
• config.ts
• features/analytics/hooks/useFeatureFlag.ts
• features/analytics/index.ts
• features/analytics/services/analyticsService.ts (deleted)
• features/analytics/services/multiPlatformAnalytics.ts
• features/analytics/services/postHogManager.ts (deleted)
• features/auth/contexts/AuthContext.tsx
• package.json