Laser File Explorer - Cleaner
A free program for Android, by Blue Laser Studio.
If you’re looking for an all-in-one utility to clean your phone, then Laser File Explorer is what you need. With the app, you can not only clean your phone of junk files, but also boost its performance, clean apps' installation packages, and even uninstall remains. The app can also help you cool the phone’s CPU and save battery.
With Laser File Explorer, you can also protect your files with a password, which prevents others from accessing them. In addition, it is a very easy-to-use app, so even if you have no prior knowledge of the Android operating system, you can still use it.