oClicker is an app that will tap your Android screen periodically without any help from you. All you have to do is select the area where you want it to tap, plus the frequency and duration. This way, you can set it up to tap thousands of times and then tap just once to get it started.
AutoClicker is a very useful app if you like playing clickers. Just leave the screen on with the app running and your video game open, earning tons of rewards and points without having to tap your screen like a maniac.