MathStep is a symbolic pocket calculator with a complete CAS (Computer Algebra System) built-in. That means that it can solve math problems for you! It has an expression editor with a live preview and even gives you hints to solving a problem by yourself for some operations.

Clean Master is an all-in-one cleaner app on android for cleaning app cache , unused files, residual files, search history and uninstalling apps. With this apps user can also Kill running Tasks and releases more RAM to boost your phone performance and save battery life without granting superuser permission.

With this app, never again will you have to worry about silencing your phone during that important meeting, or even missing calls and texts later in the day because you forgot to turn the volume back up.  Simply put in your schedule, choose your toggles, and forget about it.  Let us do all the work for you.

Never should your phone or tablet become slower and battery hungrier after lots of apps installed. With Greenify, they can run almost as smooth and lasting as the first day you had it!Greenify help you identify and put the bad behaving apps into hibernation when you are not using them, stop them from battery leeching, memory hogging and stealthy running, in an unique way! They could do nothing without your explicit launch, while still have full functionality when running in foreground.