Yes, it's again.
You are right. These so called cleaners and boost up apps in android are making their way into our phone. I too once installed it my smartphone. It just shows that your unused apps are being cleaned and some amount of RAM is being freed. But, precisely if you check after some time from your settings menu-->Apps-->Running Apps. You will get the shock. The app claiming to free up your RAM and boost up your phone has itself eaten up a lots of phone resources. So better beware of these apps.