Flex Cleaner is a powerful Android phone cleaner and booster. It will speed up your phone, remove junk files, clean the cache, and boost your RAM. It is a useful tool for all Android devices. 

It works in a very simple way. You need to do is open the app. It will scan your device to find all the files that are not needed anymore. It will remove them from your phone and store them in a safe place. This process is very fast and efficient. 

You can also choose the option to clean the cache. It will remove the data that is not needed anymore. You will see a progress bar, and it will be completed in a few minutes. 

Boost your phone's RAM as it will help you to increase the speed of your phone. 

You can see the progress of the process in the app. Flex Cleaner is a free app. It is completely free to use. It has no ads. It doesn't need any permissions.