IObit AMC is a full selection of everything required to maintain a trouble free android device.
The app can be used to easily scan your device for malware whilst providing real time protection that helps detect and block any threats when dowloading files or apps.
It also ships with a built in battery saving tool and helps you to identify apps that may be using too much power as well as providing energy saving modes of its own.
The tuneup facility will clean memory and junk files with a tap.
Another useful facility is th App Manager. This feature sorts apps by size and how often they may be used, helping you completely remove redundant application.
Numerous other handy features include the Privacy Advisor, Privacy Locker, Task Killer and the Cloud Backup feature.
For a free toolkit, this is one of the most comprehensive out there.