Flutter+Supabase Realtime
Stack IntegrationFlutter + Supabase Realtime: Live Data Sync
Supabase Realtime pushes Postgres row changes to Flutter clients over WebSockets — the pattern behind live order dashboards, collaborative features, and chat applications.
Use Cases
- Live order status updates in a Flutter restaurant or logistics app
- Real-time chat messages synced across all connected Flutter clients
- Collaborative editing with multiple users seeing changes simultaneously
- Live leaderboards and score updates in gaming apps
Implementation
Subscribe to a Supabase Realtime channel using `supabase.channel('channel-name').onPostgresChanges(...)`. Call `.subscribe()` to activate and store the channel reference. Unsubscribe in your widget's `dispose()` method — `supabase.removeChannel(channel)` — to prevent memory leaks. RLS policies apply to Realtime subscriptions: a user only receives change events for rows their RLS policy permits them to read. Test subscription behaviour with explicit RLS policies in place before shipping.