Saw this in Shareware On Sale
KCleaner offers a free version, but the Pro version is $14.99 which has "self-update" and "No thank-you page" according to the official website.
KCleaner seems to work better than CCleaner, as it cleans some junk files that CCleaner misses.
But the UI of KCleaner is not really nice.
KCleaner has no malwares or viruses after testing. The result is clean, tested by 22 different antivirus applications. The latest test result was on 24-Mar-2020.
I followed the process and got this key:
- Name: SharewareOnSale
- SharewareOnSale exclusive serial number: 61090071073083066097066096076078086084130086070051046054
Nobody should be using CCleaner anymore, it's had malware injected in to it multiple times.
Bleachbit is free and open source.