Basha Bazar

Most to-lets in Bangladesh are a paper sign on a gate, never a listing. You find them by walking. Basha Bazar records that walk, pins every to-let you pass, and turns those pins into a map the city builds together.

Solo build. App, backend, landing site, release pipeline.

Features

• Records your walking trail in the background, screen off.
• Pin a to-let with photos, rent, rooms, washrooms, floor, contact and notes.
• AI reads the phone number off a photo of the sign.
• Tap the number to call the landlord.
• One place, many contributors. Everyone adds their own block.
• Browse nearby to-lets in a photo grid, filtered by rent and rooms.
• Works offline. Pins sync when the network returns.
• Report bad listings. Two reports hide a place.

Technical

• React Native and Expo 57, dev build, TypeScript.
• Background GPS via expo-location and an Android foreground service.
• Supabase with Postgres, PostGIS viewport queries and row level security.
• Google sign-in behind a login wall, native ID token into a Supabase session.
• Gemini vision in an Edge Function, so no API key ships in the binary.
• Offline outbox in SQLite with idempotent upserts, so retries never duplicate.
• PostHog analytics and session replay, masked so no rent, contact or location leaks.
• Tag-driven CI builds a signed AAB straight to the Play internal track.
• Landing site in Next.js 16 and Tailwind v4, Bangla-first with English at /en.