In the Settings app, go to Accessibility > Touch > Back Tap and choose one of two options: double tap or triple tap. You should see a list of actions you can run by tapping the back of your iPhone, ...

You can use the back tap gesture on iPhone to open any app or do any task via the Shortcuts App. I show you how to make a basic shortcut and how to assign it to the back tap feature in iOS 14. This is ...