I would advise checking reviews and the project's official website first. There are many new platforms in the gaming industry right now, so it's important to understand how the service works, what its terms and conditions are, and what kind of support it offers. It's better to start cautiously and not invest until you have complete clarity.
Error code 5100 is often associated with a mechanical problem. I would start with the simple stuff: turn off the printer, unplug it, check inside for jammed paper or debris, carefully clean the carriage, and then turn it back on. Sometimes that's enough to make the error disappear.
It is important to exercise caution with such applications, especially when downloading modified versions of games or programs. On iOS, these often do not function as expected and may pose risks to device and data security. Before installing, it is best to check official sources, read reviews, and consider possible platform limitations. Sometimes it is safer to stick with the original versions from the App Store.