Scan and remove all the junk taking up your valuable disk space.
Clear out the temporary files that are secretly filling up your iPhone.
Get rid of the junk files from all nooks and corners of your Mac and improve its performance.
Cleanup your Mac.
check/adjust TFT, CRT, video monitors w/different test patterns
Create, edit, and sign Apple Configuration profiles.
Clean your cache on OS Catalina.
Disable or enable Spotlight volume indexing.
Check plagiarism in your works.
Make OS X run faster by toggling 64-bit kernel feature.
Font management, repair, diagnostics.