What is a POS system?

POS stands for “point of sale” — the place where the customer pays. A POS system is the software that records what happens there: what was sold, for how much, and how the money came in.

In practice it does five things in a row: finds the item by barcode or name, fills in the price, builds the basket, records the payment — cash, card or credit — and subtracts the sold quantity from stock. At the end a receipt is printed for the customer.

The difference is this: a cash register counts money, a POS system remembers the sale. So in the evening the question “how much came in, how much profit is left, who took goods on credit” is answered by a number, not by memory.

The receipt BuySale prints is a plain sales slip: it carries no fiscal mark and no tax QR code, and the software is not connected to the tax system. Your fiscal till keeps working as before; BuySale does not replace it but tracks stock, profit and customer credit alongside it.

No hardware is needed to start: the app opens in a phone browser and the camera reads barcodes — EAN-13, EAN-8, UPC, Code-128, Code-39 and QR codes. On a computer a USB scanner that connects as a keyboard works too. Receipts and labels come out through the browser print dialog: the roll width (58 or 80 mm) is chosen once in Profile, and you pick the printer in that dialog yourself.

Data lives on the server rather than on the phone, and each shop’s data is kept separately — if your phone is lost your records remain, and you can export your stock to an Excel file. The Android and Windows apps work offline for up to 7 days and send their records to the server once the connection is back.