Mobile appLive on the App Store and Google Play
Cossy: approved by Apple without adding user tracking
Our own community app for cosplayers, built in Flutter with a Supabase backend. Users can buy coins and a Premium subscription, handled through RevenueCat.
The challenge
An app that sells coins and subscriptions has to handle payments safely, pass Apple's privacy review and stay secure as it grows. All three had to be right before launch.
What we built
An iOS and Android app with a Supabase backend, in-app purchases for coins and Premium, push notifications, and analytics that users choose to turn on.
ReviewPrivacy rejection resolvedApple's privacy-label rejection was fixed, and the app was approved without adding tracking.
SecuritySecurity audit before growthA bug that could have let users give themselves extra permissions was found and fixed early.
PaymentsCoin balances kept on the serverBalances are stored and checked on the server, so they can't be changed on the phone.
Project facts
- Type
- Our own product
- Platforms
- iOS, Android
- Technology
- Flutter
- Supabase (EU, Frankfurt)
- RevenueCat
- push notifications
- analytics users can switch off
Result
Live on the App Store and Google Play.
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