The free version is a genuinely complete junk file cleaner. Registration unlocks features that save you more space and more time.
The biggest reason: Duplicate File Cleaning. The free version already scans for duplicates and shows you how much space is wasted. On most computers, duplicates waste 5 to 50 GB -- often 10x to 100x more than all other junk combined. Registration unlocks the "Remove Duplicates" button so you can reclaim that space with one click.
Registration also unlocks:
- Scheduled Cleaning -- your computer cleans itself automatically on a schedule
- Cleaning Profiles -- save and switch between named configurations
- Custom Cleaner Rules -- define your own cleaning targets
- Secure File Shredding -- permanently destroy sensitive files
- HTML/PDF Reports -- export cleaning reports for documentation
- Splash-free exit -- the closing splash screen is removed
Registration is $19.99 one-time -- not a subscription. You pay once, it is yours forever. Compare that to CCleaner Professional at $29.95 every year.
You can see exactly what registration includes by going to Help > Why Register? inside the app. If you have run a scan, it will show your personal duplicate file count and wasted space.