I Built a Free Android App to Track Subscriptions – Here's What I Learned

The author built SubTrack, a free, ad-free, offline-first Android app for tracking subscriptions after discovering forgotten recurring charges. Built with Kotlin, Jetpack Compose, and Room database, it stores all data locally with no account required. Key lessons included prioritizing simplicity over feature count, treating privacy as a core feature, and investing in App Store Optimization (ASO) for organic growth.