Phone Master is an official free phone boost junk cleaner and data traffic manager….It is small clean and run fast.

Core Features :
★ One-tap Boost to speed up your phone. Some applications may auto-start quietly from backend which may slow your phone. Use Phone Master to clean unnecessary apps that running in background and save battery.
★ Clear Trash. Free up your storage space by removing junk residual and cache files which slow down your phone.
★ Phone Cooler. It will detect CPU usage overheat application and close them to cool down phone temperature
★ App management. You can monitor applications permissions like auto-start notification pushing easier here.
★ Data traffic management. it helps you tracking and control app data usage saving data for you.
★ Harassment filter. You can use it to filter spam calls and messages.
★ Clean WhatsApp -- helps you save more space.

More surprise waiting for you to find. Try Phone master the latest version.