Quiz app that helps basketball referees sharpen rules knowledge through fast, focused training.
Built in Flutter to match an existing iOS product while delivering a true cross‑platform Android release with subscriptions, Firebase auth, and a shared realtime backend.
Implementation highlights:
- Flutter app for iOS and Android
- In‑app subscriptions in an early‑stage payment SDK
- Firebase Realtime Database and Authentication
- Hardened data rules to protect user content
Launched in October 2019 and maintained with feature updates through 2023.