Local first
The device is the source of truth in the moment. The cloud catches up, never the other way round. There’s no “offline mode” to switch on.
Friday rush.
Three tills and a full floor. Every order goes to the device first, then up to the cloud. Nobody notices.
Stage 6 hits.
The lights go out mid-service. The tablet doesn’t care: it runs on its own battery, and the app never needed the internet to ring a sale.
Still trading.
Orders keep going in. Each sale is saved on the device in a queue, waiting for the power and the signal to come back.
Power’s back.
The queue syncs itself in seconds. No duplicates, no re-keying, no gap in your numbers.
Clean cash-up.
One tap. Every sale is there, including the ones rung up in the dark.