Qershnat

Qershnat is a complete product I built from scratch: one Flutter app running on iOS, Android, Huawei AppGallery and the web, backed by a Laravel server that handles accounts, sync, the admin console, notifications and an in-app assistant.

At its heart is a local-first sync engine: every action is saved on the device instantly and works offline, then uploads in guaranteed order with protection against duplicates and conflicts across devices and shared accounts.

The app covers wallets, budgets, debts, instalments, savings circles, recurring bills and family sharing — with WhatsApp notifications, electronic cards, a support-ticket system and a full admin console that monitors system health.