Phone Lock + Volume (OFF+)

★★★★★ Best app for phone lock and its work for unlocking through fingerprint.

★★★★★ I've tried a LOT of the screen-off apps (possibly most of them) including many of the paid apps, and this one is by far my favorite! My LG phone had this feature built in, called "knock off" - until I switched to a third-party launcher app. I really missed being able to turn my screen off without using the power button and without locking it. So I was thrilled when I finally found this app. All the other apps I tried automatically locked the screen, disabled the fingerprint sensor, so I had to use my PIN to unlock the phone, or kept the faux black screen for a very long time before the screen timed out (during which time, accidentally hitting the volume button, etc. would turn the screen back on). This app temporarily lowers the screen time-out, so the faux black screen only lasts a brief time before the screen times out. Once the screen times out, I can use LG's built-in "knock on" feature to turn the screen back on later without having to unlock it. (For some reason, knock on still works, even though knock off doesn't.) The launcher app I use (Nova Launcher) allow me to set actions for various gestures (like double-tapping the screen), so I was able to configure the double-tap gesture to activate this app. Now, double-tapping on my home screen turns it off just like it did originally!

★★☆☆☆ Does not work, and screen goes dark, while tablet is still on. App does not turn off tablet.

★★☆☆☆ Useless, as it doesn't even show in the "downloaded services" section in the Accessibility menu. Since the Dev chose not to have an interface at all (not even a very basic full one), this app just has an icon to lock your android device. Useless.

★★☆☆☆ Totally useless app, I haven't recommended users to install it, and it is obviously for Pie users.!