Bifit Kassa is truly free. At first, I expected there would be hidden fees, additional modules, and features that would require payment, leaving only limited functionality. But everything turned out to be genuinely free, which surprised me. There are no subscription fees, installation fees, or charges for advanced features. Although there is a paid version, it hardly offers any additional benefits, only priority support, which I haven't needed yet, so it's not relevant for me. The paid version also lacks ads, which is typical for free products, but that doesn't bother me. The company offers a cloud service and software for managing online cash registers. The app is available on Android and iOS, as well as on Windows and even Linux. I lowered my rating due to the quality of the app's performance, especially on Android. Perhaps there are fewer bugs on iOS or none at all, but I try to use the app as little as possible. It's best to work through the personal account. The service connects well with the cash register and performs all necessary operations, such as income, expenses, and returns. You can accept payments in cash or by card, even when part of the amount is paid in cash and part by card. It also supports inventory management and the ability to conduct stocktaking. Additional features, such as rounding amounts to the nearest ruble, really speed up calculations when dealing with cash, and there is also the option to print additional information on the receipt.