I'm a big fan of CCleaner for windows. In fact, I use a few Piriform applications (Speccy is the best). Thus, I immediately opted into the company's beta program when it launched CCleaner for Android. It's a simple application, but it's still packing some useful utilities under a name I trust.
Until today, anyway.
As of the most recent update, CCleaner is basically nothing more than a glorified task killer.