Cheetah Mobile is a leading mobile internet company. The Company aims to provide the best apps for mobile users worldwide, while building a leading global mobile ad platform for advertisers. As of June 2015, Cheetah Mobile had approximately 494 million mobile monthly active users in June 2015. Its mission critical applications, including Clean Master, CM Security, Battery Doctor and Duba Anti-virus, help make the internet and mobile experience speedier, simpler, and safer for users worldwide. Cheetah Mobile is the publisher of Clean Master, the #1 mobile app in the Google Play Tools category worldwide by monthly downloads in June 2015, according to App Annie.