Cert is a habit-streak mobile app where an AI judge verifies your daily proof — a photo, a short in-app video, or a GPS check-in — before the day counts. Miss a day and the streak resets on purpose, which is what makes it worth keeping.

Built solo (with a lot of AI-assisted development): React Native/Expo client, Supabase backend (Postgres, Auth, Storage, Edge Functions), Google Gemini as the AI judge for photo/video proof, RevenueCat for subscriptions, and a Vercel-hosted landing page.

Key features:

• Freemium: 1 free goal with photo proof; Pro unlocks video/location proof, unlimited goals, and analytics

• Group challenges — friends share a streak, last place spins a wheel of custom dares

• Shareable proof cards and a progress reel for every streak

• Fully bilingual (English/Russian)

Live on the App Store now, solo-built end to end — happy to talk about the AI-assisted build process.