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 of 1,450,000+ courts and fields across nine sports worldwide, using an Expo and React Native app on Supabase Postgres with PostGIS, a Cloudflare D1 edge replica for court reads, GPS proof-of-presence check-ins, and server-side-only scoring so the crowdsourced map stays trustworthy.
React NativeSupabasePostGIS
11 min read
Jun 6, 2026
Pinned Calendar: An Offline Agenda With Recurring Tasks for Android
Your calendar and recurring tasks, visible in one persistent Android notification. How I built Pinned Calendar with actionable reminders, an adjustable agenda layout, and on-device storage, now available on Google Play.
AndroidKotlinJetpack Compose
7 min read
