The app crashes if I code Go to screen 1 while I'm at screen 1, but here's the solution fr you while testing

App Inventor for iOS
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1

Problem:

It's just IOS. So basically just like I mentioned, if you code go to screen 1 while you are at screen 1, your IOS companion will give you a black screen. (But still, you can leave the app and perform other actions. It won't hurt your IPad)

Solution:
Just refresh the companion and it's fine. Don't forget the remove the block as well! :wink:

I'm not sure if this also applies to the app when it's published later or not.