What are some alternatives?
When comparing PerfectDisk and IObit Smart Defrag, you can also consider the following products
Defraggler - Defraggler, the award-winning hard drive defrag tool from the makers of CCleaner. Optimize your hard drive and free up space. Download the latest version for free.
UltraDefrag - UltraDefrag is an open source disk defragmenter for Windows.
Auslogics Disk Defrag Touch - The smart way to defragment a touch-screen computer running Windows.
MyDefrag - MyDefrag (previously JkDefrag) is a disk defragmenter and optimizer (a maintenance utility to make...
WinContig - Freeware file defragmentation tool.
Windows Disk Defragmenter - Disk Defragmenter is a computer program included in Microsoft Windows designed to increase access...