The new repo even includes an TestFlight link. So you don't need to compile the new project by yourself. Maybe I will even at some point submit it to the AppStore. The new project is much faster and more reliable.
This Client is based on my own WebUntis Swift Framework.
I will probably not publish this app on the app store, but if you want to use it, you can compile it your self and use it.
If you find any Bug with this App, write an Issue in this GitHub Repo.
Make sure to give enough information. A simple: It does not work
doesen't help anybody.