Use APKPure App
Get SLock old version APK for Android
बंद अपने स्क्रीन टिनी क्लिक के साथ
SLock : Turn off and lock your device screen with tiny click
Note: This app uses the Device Administrator permission to lock the device screen : android.permission.BIND_DEVICE_ADMIN
Source Code : https://github.com/ProximaDev/SLock