When I connect to test finds a companion device and then freezes at 10% and that's it

App Inventor for iOS
4

So there have been reports of at least three different Chrome extensions that interfere with the latest version of the companion with iOS. If you use any of these extensions in your school environment, it might be possible to use a Guest account in Chrome to sidestep the issue:

  1. GoGuardian
  2. LightSpeed
  3. Read & Write
FAQ Section: iOS