Do cache cleaner (or "phone booster") apps actually work? Do apps that clean junk files actually work? For example, an app like Super Cleaner.
It promises to clean residual files and junk files.
My main debate is similar to &quot;Does Android need an antivirus?&quot; I can tell that some cleaners make my phone seemingly fast, I just don't know if it's needed, funcitonal or even safe. I've heard that some delete important files, while some don't.
I can say, in my experience that it is truly contingent on the tool you choose to use.

I am very happy with SDMaid, which i have used for years. It seems to clean everything it says it will.

If you read through my other postings here, you will find I usually recommend it for the "CorpseFinder" functionality to clear remnants of older, non-fully uninstalled apps, though the AppControl, SystemCleaner, and Databases functionality are useful, too.

I am satisfied each time I use it that the cleared item were non-critical, yielding back space I can use. I have not encountered a problem with either my phone, or my tablets, where files were improperly deleted, that I would attribute to some actions of this software.

DISCLAIMER - I am not the developer, or attached to the product in any way, except as a satisfied user.