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Joined on: April 11, 2016
User's Score: 1190
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Similar to the iPhone X or LG phones. Tap on the screen to turn it on
I would avoid anything like that that isn't built into the kernel. Guaranteed to cause battery drain.
I've had a few older phones (back in the days of Jellybean and Kitkat) that had the double tap to wake feature and loved it. It was probably the one feature I missed most when I switched to using my Axon7. I had never noticed any battery drain due to the feature, and usually ask for it as a feature in any phone. I can see it working ok with the Axon M, but wonder it it may cause conflicts due to second screen as mentioned. I try to stay away from apps that add these features. it's been my experience that they cause more headache than anything.