Clean Master is an optimization utility program for devices running on Android. It comes with numerous features that are expected to boost the performance of a device. Some of the utilities bundled in the app are a junk files cleaner, antivirus, Wi-Fi security, battery saver, and boost mobile. The junk cleaner scans your device for residual and cached files which accumulate as you use your device and install and uninstall various apps. Likewise, an antivirus is bundled into Clean Master to provide security from viruses and other threats. The Wi-Fi security provides peace of mind as you access public networks. On the hand, the battery saver and boost mobile works hand in hand to enhance your gadget’s performance by prolonging battery life and freeing RAM space. Other features of Clean Master are the app lock which allows you to restrict access to apps, game booster which enhances the gaming experience, app manager which allows you to delete or uninstall apps, and charge master which help boosts and speed-up the charging of your device. Clean Master is a product of Cheetah Mobile, a company based in mainland China. The app is one of the most popular optimization tools in Playstore. According to their website, Clean Master has almost 1 billion downloads globally. It also cleans around 5.1 billion MB of junk files daily and frees more than 3.5 billion MB of RAM daily to in optimizing devices.