If it's a 3rd party app, I recommend uninstalling it. Android doesn't need any additional "memory management," and these kinds of apps can actually be counterproductive. They often work by killing apps to "free up RAM," but the way Android works, it wants RAM to be mostly full of open apps. So the system will just open apps again into RAM. If the memory manager app keeps closing apps automatically, then you get into a close-open-close-open cycle that uses battery and bogs down performance.