"In order to uninstall, simply drag and drop this application in your Mac's trash bin." Like you haven't heard that before - but it's telling only half the truth. Every uninstall can leave single files on your system. These files may not amount to much, but some of them may cause trouble and inevitably, they do pile up on your hard drive.
Have you become a hunter-gatherer in the digital age? Do you frequently download applications from the internet to test them and delete them afterwards? This is not the only reason for using CleanApp - this Swiss Army Knife of system maintenance utilities keeps your Mac clean, lean and efficient.