Clean Master is a Free, top-rated all-in-one cleaner app for Android™ devices
More Info:
https://play.google.com/store/apps/details?id=com.cleanmaster.mguard
Recent changes:
3.8.6.498
1. Fix crash issue on Android 4.4 device (Nexus 4, Nexus 5, Samsing Note 2, Galaxy S3, S4 etc)
2. New algorithm to identify rarely used apps in App Manager.
3. New Privacy items supported.
4. Optimized Memory Boost to smartly kill more tasks.
5. Other bug fixes.
3.8.3.458
1. Fix bug which may consume huge battery usage on some devices (especially on Android 4.4 Kitkat)
2.Fixed bugs and improved Memory Boost
3.Add usage frequency information in App Manager