Clean Master is a small, fast, and smart Android device Speed Booster, Junk Cleaner, Battery Saver, and performance booster. This phone booster app is the best Helper for Accelerate and Clean Up your Android device. Key Features: Battery Saver and Optimizer: This cleaner app can instantly find and fix power-consumptive background apps with one tap to boost your battery life. Junk File Cleaning Delete cache, residual files, and temp files to reclaim storage space. The cleaner can easily free up valuable storage space on your device. Memory Boost Clean background tasks, free up phone memory(RAM), speed up your device, and save more battery. APP Manager Uninstall unwanted apps.