When comparing Defraggler vs IObit Smart Defrag, the Slant community recommends Defraggler for most people. In the question“What are the best disk defrag tools for Windows?” Defraggler is ranked 2nd while IObit Smart Defrag is ranked 7th. The most important reason people chose Defraggler is:
Option to drill down to defrag single files or folders; from within the app or from an explorer context menu.
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Pros
Pro Defrag single files and folders
Option to drill down to defrag single files or folders; from within the app or from an explorer context menu.
Pro Portable and convenient
The application can be run from the desktop or configured to run from a thumb drive for convenience as well as multicomputer maintenance.
Pro Selective use
Allows for the defragmentation of an entire drive or, more uniquely, select areas depending on user preference.
Pro Can defrag exFAT partitions
Pro Scheduled maintenance
The built in scheduling application can be used to ensure that disk maintenance is reliably routine and non-intrusive.
Pro You can set multiple defrag schedules
You can set multiple defrag schedules and have Smart Defrag simply exit, shut the PC down, or continue monitoring.
Pro As boot time degrag
You can set manual or scheduled boot time defrag.
Pro Can set defrag pauses on specific programs
You can set Smart Defrag to watch for specific programs to be running and then pause any running defrag until this program is no longer running, such as games or game launchers.
Pro Benefits solid state and mechanical drives alike, including systems with both types
The standard TRIM function is used to maintain solid state drives while the defragment function services the needs of the spinning platter drives
Cons
Con Can be pretty slow
It can take a day to complete defragging. If you run the Windows built in defragger first, then it runs much much faster afterwards.
Con Dumber than Windows default defragment tool
Con Attempts to install additional software alongside it, and installs IObit Uninstaller or other IObit software if the user selects 'default' or simply selects 'ok' without paying attention.
The package is becoming more bloated and encumbered with efforts to monetize it as it matures. The free version will continue to advertise purchasing the PRO version and other IOBit software until purchased which is understandable but annoying.