What happens when the internet drops

In the Android and Windows apps — yes. The sale is recorded on the device at once, queued and sent to the server in order by itself when the line returns; this works for up to 7 days, and the app warns you if the queue is older than 3 days. If the server rejects an operation (for example on a data conflict) it stays in an “errors” list — never silently lost — for the shop to resolve. The browser version (app.buysale.uz, Telegram) has no queue: without a line the sale is not recorded, the basket stays on the phone and you press the button again once the line is back.

No. Baskets are kept in the phone’s own storage: switch sections or close and reopen the app and the items, quantities and payment type are still there. Because the sale did not go through the basket is not cleared, and up to eight baskets can be open at once.

In the Android and Windows apps each queued operation is sent once. In the browser version that risk exists and we do not hide it. If the connection broke as you pressed pay, the request may never have reached the server, or it may have reached it with the answer lost — the screen shows the same error either way. So before pressing again, open the History tab at the till and check whether that sale was recorded.

Yes: the evening report is prepared and sent by the server, not your phone, so it reaches Telegram even if the phone was off. It will contain only the sales that were actually recorded, though — what you wrote on paper does not appear until it is entered, and an app’s queue does not appear until it reaches the server.

No. An outage does not sign you out: when the line returns the app opens under the same shop and no new Telegram sign-in code is requested. One caveat: a member of staff who is already signed in stays signed in — but nobody can sign in with a PIN during an outage, because the PIN is checked on the server. If a shift handover falls inside the outage, the incoming seller cannot get into their own account until the line is back.

First try BuySale’s Android or Windows app: it works offline for up to 7 days — sales, debts, payments, expenses, intake and returns are queued and sent when the line returns. Creating new products, stocktakes and settings still need internet, though, and the browser version does not work offline at all. If you need longer or fully offline operation, among those stating offline work on their own site (checked 18.09.2026): Paloma365 up to two weeks offline, RAOS with local storage offline and a sync when the line returns, iDokon works offline too but, being cloud-based, needs a stable connection. Ask each one how long its offline mode lasts and how the data is sent afterwards rather than trusting a table row.