A free app for Android, by CookieDevs.
Clean Ninja is an all-in-one Android clean, speed, and memory booster. It helps you save battery power, CPU resources, and data RAM by cleaning junk files, speeding up the phone, and optimizing the device. In addition, it helps you to keep the phone's memory from filling up.
With Clean Ninja, you can clean up the following:
Junk Files: the space occupied by the junk files needs to be cleaned up.
Speed: the phone needs to be speeded up to ensure that it runs smoothly.
Memory: the memory used by the app needs to be cleaned up to ensure that it is not used by the apps.
CPU: the usage of the CPU needs to be reduced to ensure that the phone is not overloaded.