Clean Master is a top-rated phone optimization app on Android that removes 30% more junk compared to other utility apps. It frees up storage space by removing junk files, as well as residual and cache files from IM and short video apps, while cooling down the phone. Named the Best Antivirus Software for Android by independent IT-security institute, AV-TEST, Clean Master runs on Cheetah Mobile's industry-leading "cloud + AI" platform and ranks among top apps in Google Play Store in 100 countries, with more than 3 billion global downloads as of 2018.
CM Security Master
Downloaded more than 1.1 billion times and trusted by consumers around the globe, Cheetah Mobile's Security Master is the world's leading mobile security app that safeguards users' information, providing features such as intelligent threat detection, app lock, in-depth file cleaning and intruder tracking. In 2018, Cheetah Security Master won full score for both tests by AV-Test, the internationally-recognized anti-virus testing agency.