Clean Master, the No.1 FREE Android optimizing tool. Trusted by over 740 million users to make their phones run as it's brand new. Clean Master (Boost & Antivirus) helps clean up junk files, cache files, junk notifications and unused RAM to improve phone performance! Protect your privacy and enhance your phone security with Clean Master's (Boost & Antivirus) real-time protection that is powered by the world's #1 antivirus engine.Clean Master (Boost & Antivirus) Highlights:★ JUNK FILE CLEANING Cleans junk, residual and cache files to free up storage. Boosts speed and improve the performance of your phone. Keep your phone clean and fast with Clean Master.★ NOTIFICATION CLEANER Blocks and cleans junk notifications. Stops trash notifications from jamming your phone.★ PHONE BOOST Boosts your phone by freeing up RAM and fixes abnormal app behaviors with 1-tap.★ ANTIVIRUS Keeps your phone safe and secure with Clean Master's free antivirus engine (ranked #1 by AV-TEST)! Scans the system for pre-installed and user-installed apps to keep your device safe from viruses, Trojans, malware, vulnerabilities, adware and spyware. Protect your privacy with Clean Master.★ CPU COOLER Cools down phone's temperature and reduces CPU usage by stopping overheating apps. And extend battery life!★ BATTERY SAVERAnalyzes battery status and hibernates running apps to save power, extend your battery life with 1-tap using Battery Saver.Other optimization features☆ CHARGE MASTER -Shows news headlines and app messages when charging phone☆ APPLOCK-Protects your privacy with your own AppLock PIN or pattern☆ iSWIPE-Quick access to other apps and tools ☆ GAME BOOSTER-Manage your games and accelerate loading speed of games☆ APP MANAGER -Back up and uninstall appsClean Master, the world's No.1 cleaner app.