Barx

BarX is a point-of-sale (POS) application for retail and bar operations in Kosovo. It is used by businesses (merchants) to record sales, print receipts, and comply with the fiscalization requirements of the Tax Administration of Kosovo (ATK).
1. Date the app stores on your device
Product catalog — product names, prices, and tax rates entered by the merchant.
Sales records — orders, order items, totals, timestamps, and generated fiscal QR codes, stored in a local database on the device.
App settings — business details (name, address, business number), printer configuration, API endpoint, and the merchant's fiscal signing key, stored locally on the device

2. Data transmitted off the device
Tax Administration of Kosovo (ATK) — when fiscalization is enabled, each completed sale is sent as a digitally signed fiscal coupon (items, amounts, tax groups, business identifiers) to ATK's fiscalization service, as required by Kosovo law. Verifying a receipt QR code also sends that coupon data and the citizen ID entered by the user to ATK.
Merchant's own server (optional) — if the merchant configures an API endpoint, completed orders are sent to that server. That server is chosen and operated by the merchant, not by the BarX developer.