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For hands-free play, you need a device that has the specialized front facing cameras needed to calculate distance/movement.
iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max or newer
Will run on all iPhones and iPads using iOS 11.2 or newer.
The app will automatically switch to manual mode if it cant enable the appropriate hardware.
Simply tap on the tile you wish to move.