Touch Lock - Lock Screen Keys is a free Android app developed by SG Tech App. This app can lock your screen touches and hardware buttons that we tend to press unknowingly, including the navigation bar. The app is useful for avoiding children from pressing on your screen or for preventing unnecessary touches while watching videos on your phone.

The app's main features include the ability to lock the device's full screen, bottom navigation bar (Recent button, home button, back button), and device screen while incoming calls, to prevent pocket touches and unnecessary touch while the call is running. Additionally, the app has a video lock feature to avoid unwanted touches while watching videos, and it can lock the volume button. It also has a feature to remove app lock screen using the volume button.

To use this app, certain permissions are required, such as overlay permission to apply the lock over other apps and read phone state permission to get the state of the call (ringing, call received).

Overall, Touch Lock - Lock Screen Keys is an excellent tool for anyone who wants to avoid accidental touches on their phone and keep their device secure.