Memory Optimizer Lite is an Android app for free. It analyzes your phone's memory usage and finds and cleans up unnecessary processes, files, and memory. It has an interface that is very easy to understand, with graphs that show your phone's memory usage. You can also set the time interval for which it should perform the process, so you don't have to worry about the battery drain. It also has a notification bar, so you will be notified when it is cleaning up your phone. It will also work automatically, so you don't have to do anything else to make it work. You just need to install it on your phone, and it will do the work for you.