Mandarin

Problem. splitting expenses with friends across trips and shared bills gets messy — group chats, spreadsheets, forgotten IOUs.

Solution. a mobile app that tracks balances live and calculates the minimum number of payments needed to settle up.

Tech stack

Expo / React Native (iOS + Android)
Node + Postgres (Supabase)
Websockets for live updates
Push notifications, deep links

Features

Real-time balance tracking across groups
Minimum-transaction settlement calculation
Trip-based expense grouping
QR / deep-link join flow
Push notifications on new expenses and settlements