Ol Chiki Keyboard
Santali and English both added, Olchiki letter corresponding English letter
To install keyboard on your mobile.
-Go to your Phone Settings.
-Find and tap Languages and input.
-Tap on current keyboard under Keybrd & input methods.
-choose new keyboards.
More visit
https://medium.com/@badalmurmu/olchiki-script-support-for-android-devices-b6cc5e866fa0