Fixed: I typed all the below and then figured it out. I'm leaving this for future idiots like me.

I had been using the TestFlight version and that must have expired. TestFlight's user experience when test versions expire is horrid. It simply crashes silently. This happens just rarely enough that I forget to check. I reinstalled from the app store and all is well, including the couple files I had stored locally.

Original post

I cannot start Pythonista (v 3.3 - latest, iPhone XS, iOS 13.5.1). I briefly see the Pythonista logo/splash screen and then I return to my iphone home screen.

I've tried solutions I've found here and elsewhere, including:

• going to pythonista:// and pythonista3:// from Safari
• going to the Files app and opening one of the python files in my Pythonista iCloud drive folder
• settings "Launch in Safe Mode" in Pythonista settings
• restarting the phone

I've not yet tried uninstalling and reinstalling because I have at least one other file stored locally (i.e. not in iCloud drive, stored locally because of a problem with running extensions from iCloud Drive).

Any other ideas?