Ram checker and cleaner
The application show the stat of your ram memory (used ram memory, free ram memory and total ram memory) and also the app can help you to clear and boost your memory without any root permissions.
Ram Cleaner app is easy to use just click on clean button and wait until your ram memory cleared then you'll get a notification contains how much space you free.
And of course when you free your ram memory your phone will become more faster to use.