Nothing works, a subscription is required to do anything
You open the app and you're presented with a welcome screen where you can choose if you want to Sign up with Apple or go with "Private ID". Both options lead to crashes. After signing up with Apple for the second time, the app shows immediately a window called "Your Subscription" that you cannot close unless you choose one of the options. I haven't even seen the app at this point, how am I supposed to decide if I want a subscription? The same window also says that my subscription expired on the 1st of January of the year 1... If I ignore that window and find my way to the menu item "New Window", I'm back to the welcome screen where I'm forced to sign up (and again both options lead to crashes). I am a developer myself, I do understand that making an app is hard, but this experience is unacceptable. After spending 15 minutes in the app, I still haven't been able to see the app working. I am happy to update my review when the developer fixes the app and allows me to try it out.