Mobile
2 posts tagged Mobile.
Jul 11, 2026
Building Rally: A Live, Crowdsourced Court Map That Stays Honest
How I built Rally, a gamified, crowdsourced map that shows which tennis, pickleball, badminton, and soccer courts are free right now, using an Expo and React Native app on Supabase Postgres with PostGIS spatial queries, GPS proof-of-presence check-ins, and server-side-only scoring so the crowdsourced map stays trustworthy.
React NativeSupabasePostGIS
7 min read
Jun 6, 2026
Pinned Calendar: A Self-Healing, Offline Agenda for Android
How I built a privacy-first Android app that pins your week's Google Calendar events and to-dos to a persistent, self-healing notification — no foreground service, no sign-in, and no INTERNET permission — using Kotlin, Jetpack Compose, custom RemoteViews, WorkManager, and a delete-intent that re-posts the pin the instant you swipe it away.
AndroidKotlinJetpack Compose
8 min read
