Speed Booster- CleanerBattery is a free Android utility app developed by super booster De. It offers two main features: a professional VPN service and junk file cleaning. The VPN service has a large number of servers and a well-designed user interface. It also has no usage or time limits, and no registration or configuration is required. The junk cleaning feature can clean up useless data on your phone, including .log and .tmp files. It can also clean up the installation packages of applications, ensuring that no wrong data is deleted.

Overall, Speed Booster- CleanerBattery is a useful app for keeping your Android phone clean and secure. It is easy to use and provides a professional VPN service that can protect your online privacy. If you have any feedback or suggestions for the app, the developer welcomes you to leave a message or send an email.