This is the best summary I could come up with:
The gesture allows you to control your supported Apple Watch (Series 9 and Ultra 2) with a pinching motion, all without ever having to touch the display.
The idea is to give you a way to interact with the watch if you don’t have both hands free — like when you’re cooking, carrying groceries, or are on a walk and holding a cup of coffee.
Apple means for the feature to be contextual, so for this first iteration of the gesture, it’s pretty much decided everything double tap will do for you.
Unfortunately, double tap is not compatible with older Apple Watch models, as it runs on the neural engine that was introduced with the S9 processor.
If you’d like to control your watch hands-free and have an older model, take a gander at our Assistive Touch guide.
This is a neat way to use double tap and the Smart Stack to create a hands-free app launcher.
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