Phone Master is definitely a good option as long as you're seeking to identify and potentially fix common issues that pop up within the operating system of your phone/tablet. Thanks to its powerful cleaning engine, you can start improving the performance of your mobile device by getting rid of app data cache, unnecessary files and folders, and more.
Applications and games which cause too much stress on the CPU of your device can be pointed out inside the interface, and you should take some measures to prevent the processor from overheating. Moreover, you can go way further by checking the battery usage of each of your individual apps. A proper way to save some battery life is by hibernating processes draining the battery of your phone.
Phone Master also provides a built-in App Locker which works just as expected. You can use this module to prevent your sensitive apps, photos, messages, videos, and so on, from being accessed by other people using your device. The locking system can be configured to either use a password or a pattern. All of the data mobile plans available on the market come with a limited amount of traffic available each month.
With help from the Data manager component, you can now get an idea regarding how much data each one of your installed apps uses.