Knock cydia tweak adds two events to Activator for you to assign to actions – a hard tap or knock on…
1) The left or right side of your iPhone
2) The front of back of your iPhone
This is achieved with the device’s accelerometer. A lot of effort has been put into reducing CPU/battery as well as false positives, by ignoring knocks on the screen, ignoring knocks while the device is asleep, and trying to ignore knocks of the device against other things.
Given the above, be warned: this works very, very well… but not perfectly. Perhaps don’t assign a knock event to Power Off :)
Configure Activator from settings.
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