— First go to Play Store.
— Search for MacroDroid.
— Install it.
— Now go to Templates.
— Search the lock farther. Tap on this.
— Click on this Add Button.
— Then go to macro.
— Open the lock farther.
— Tap on the Application launched.
— Click on Configure.
— Select OK.
— Select any application you want to lock.
— Tap on OK.
— Save it.
Now when someone tries to open that App, it will close by itself. So cool try it.
Watch The Video Tutorial Below For More Details 👇