The problem
Family coordination lives in a dozen chat threads: shopping lists that expire, shared expenses nobody tracks, reminders that reach one person instead of the household. Famyline gives a family one shared surface for lists, a family fund, reminders and daily flow.
The approach
The mobile app is Flutter with a deliberately partitioned package architecture: feature modules cannot import each other — only the shared core — and that boundary is enforced in CI on every commit, not in code review comments.
A family app has to work in the supermarket basement: the data layer is designed offline-first with an outbox-based sync engine against a NestJS + PostgreSQL backend, so actions never wait for the network.
Status
Famyline is an Applyron product in active development, with its 21-screen experience mapped, the design system tokenised and the module skeleton live under CI contracts.