Internet goes down. Your register doesn't. We explain why offline-first architecture is the only reliable approach to POS systems.
The internet is not reliable
According to ISP statistics, even premium connections experience outages 2–5 times per month on average. In a restaurant, that means: a non-functional register, nervous guests, lost orders and revenue. And it's not just provider outages. The Wi-Fi router restarts, someone unplugs a cable, the signal doesn't reach through thick old building walls. In hospitality, the internet connection is the least reliable part of the entire operation.
What offline-first means
Offline-first doesn't mean "also works offline". It means the local database on your device is the primary data source. The app always works with local data — fast, reliable, with zero latency. Cloud sync is a bonus, not a requirement. When internet is available, data syncs in the background. When it's not, nothing happens — you keep selling as if no cloud existed.
How it works in Kasyro
Kasyro uses Drift (an SQLite wrapper for Flutter) as the local database and PowerSync for synchronization. Every device has a complete copy of all relevant data. When a waiter enters an order on a tablet, it's saved locally instantly. PowerSync then uses WAL streaming to sync the change to the server and from there to all other devices — kitchen display, register, manager's tablet. The entire process typically takes 200–400ms.
The future is hybrid
Cloud-only systems are convenient for vendors but risky for customers. Purely local systems are reliable but isolated. The future belongs to the hybrid approach — offline-first architecture with smart synchronization. Kasyro proves it can be done. You can have the reliability of a local system and the convenience of the cloud at the same time. No compromises.