iOS 11 implemented the change that we found out a few months ago, applications that are not compatible with 64-bit processors being blocked on iPhone and iPad. In the image below you can see the alert message that iOS 11 displays when we try to access an application that does not support 64-bit processors, the option to run them anyway not being possible.
If until now Apple displayed a similar alert message in iOS 10, but allowed applications to run anyway, in iOS 11 they are completely blocked. Pressing the OK button after displaying this alert will close it and nothing more, iOS 11 refusing to do anything other than tell us that the developer will have to update its application for 64-bit processors.
Apple has probably started notifying developers about this change for iOS 11, but users have no choice but to wait for updates. By the fall, many apps should be updated for iOS 11 so that they are compatible with 64-bit processors, but in the meantime you should avoid iOS 11 if you need those apps.
