A free app for Android, by Cheryl Cook.

The best Android phone cleaning and optimization app is here! Clean Master is a lightweight and fast-running app that makes your phone run smoothly. This tool can scan your phone to find and remove junk files, memory, and other useless residuals. It is easy to use and has an intuitive user interface.

Junk Cleaner – Clean Master helps to release the memory space by removing junk files. It can analyze all the junk files and then automatically identify those useless residual junk files to release more storage of mobile phones.

You can stop background apps to release memory and boost your phone.

Stop power-consuming apps to help you close inactive applications that run in the background.