Clean Master

Clean Master offers anti-virus protection, an app lock and a thorough cleaner for smartphones. Clean Master is also one of the best smartphone optimizers available. It can free up RAM, storage space and other system resources to get your phone working smoothly and faster than ever.

As a junk cleaner, this app can get rid of cache files and other residual junk on your phone or tablet. It can also scan for viruses and help you to quarantine or remove them. It even provides real-time protection against viruses. WiFi security keeps your phone safe from fake or unauthorized connections.

As an optimizer, this app also has a game mode to make sure your phone operates efficiently while playing games. The handy battery saver can greatly extend the life of your phone. An included app-lock feature allows the user to lock out apps and protect their privacy.