I've been trying out the various versions of Clean Master on my Samsung Tab 4 7.0 and anything before 5.0 is fairly primitive. I have decided to use version 188.8.131.525 because it has a more modern interface and there is a big difference between the Junk Files found in the Standard and Advanced modes (163MB vs 395MB). In version 5.3.0 the difference was 318MB vs* 395MB which means that the Standard mode was a lot more aggressive (I like having a wider choice of options between Standard and Advanced.)
The subsequent versions through the last one I recommend (184.108.40.2062) got progressively more aggressive, with the Standard mode recommending 980MB and the Advanced mode recommending 1.82GB of files to be cleaned.
NOTE: All of these figures are for the tablet which was inadvertently cleaned earlier today with one subsequent mild cleaning by 360 Security. Caches may have increased a little bit since that time.
So why do I not recommend any version higher than 220.127.116.112?* With version 18.104.22.1681 (released 12/10/2014) the whole user interface was all screwed up with Cheetah more interested in advertising additional products than serving their existing customers. Good luck finding Settings to customize the app - everywhere you click you are presented with more apps to download. FWIW version* 22.214.171.124 was only slightly smaller (961MB vs 1.82GB).
In any case I figured out how I inadvertently initiated the cleaning process- it's kinda hard to miss the CLEAN JUNK bar at the bottom of the screen...
Although I have not used Clean Master ver. 126.96.36.1995 long enough to actually recommend it I am fairly certain it will help with space management on my tablets. But definitely stay away from any version from 188.8.131.521 and up- with that release the company turned to the dark side! (I guess those versions might be okay if you go with the default settings and don't care about saving any data files on your mobile device - especially on a smart phone - but I intentionally download files and save screenshots for my clipping archive.)
Here is a link to the page on Android Drawer with all of the versions of Clean Master. Note: Android will allow you to upgrade from an older version but will usually require you to uninstall the app to downgrade to an earlier version. So start with the oldest version and work your way up to newer ones...
Here is the link at UpToDown:
To avoid all of the ads on those websites here is the link to my Dropbox folder named Clean Master:
P.S. I am still too scared to press the CLEAN JUNK bar at the bottom to see if I get a confirmation prompt on at least some of the versions. (I may wait until I do a factory restore on one of my tablets... with nothing of any importance to lose.)
P.P.S. The Dude, thanks for the recommendation! It was my fumble fingers that caused the deletion of 750MB of files (I had already uploaded 99% of the files I wanted to save to Dropbox but I did want to see exactly what CM intended to delete first.) BTW can you post which version you are using now?
Clean Master should save me a lot of time searching for files with ES File Explorer version 184.108.40.206. Yes, while some people are connoisseurs of vintage wines I am a connoisseur of vintage apps and programs...