iOS already has three-finger pinch to copy/paste, and three-finger swipe to undo/redo. But I find that these gestures are too unreliable for regular use, the ge

iOS already has three-finger pinch to copy/paste, and three-finger swipe to undo/redo. But I find that these gestures are too unreliable for regular use, the gestures almost always activate some other click target plus my other fingers are busy holding the phone.