yes you can, through 2 buttons : 1- first button is fully erasing button you can delete all the written stuff on the screen.2- second button once you click on it you can erase any part by your hand or the rubber on the back of your pen
Can We Use Mobile Joystick In Any Smartphone?
yes you can , Cardoo joystick is compatible with all smartphones which supports that has screen size less than 6.4 inch.