This Lock My Phone app needs Device Administrator permission. Otherwise, it can't lock your phone.
Recurring lock periods, for example, lock your phone every evening during the week after 10 pm.
One-time lock periods for when you just want to concentrate for 45 minutes while studying.
Geocheck-Feature: Only lock your device if you are in a certain area. Helpful so your phone isn't locked while you're out with friends.
While your device is locked you can still access the apps on your lock screen, take phone calls and call emergency numbers (911, etc.)
Emergency contacts (see below). If you unlock it during a lock period, it will be locked again right away.
You can only have one lock period in total on the free version, so you can either have 1 one-time lock or 1 recurring lock period.
Lock my Phone and kills that lure so you can concentrate on what's important.