Speedy Cleaner is an all-in-one tool that makes your Android phone faster, more stable, and more efficient. It is an efficient utility that helps you clear away junk files from your phone, which in turn enhances the performance of the device. It is a perfect phone cleaning app, as it works perfectly on all Android devices. What does the Junk Clean app exactly do: The junk files are often left over after uninstalling apps or removing cached files from the device. These files take up valuable storage space and clog up the phone. But don't worry, Speedy Cleaner can help you get rid of them.