When comparing ShiftIt vs Disk Inventory X, the Slant community recommends ShiftIt for most people. In the question“What are the best power user tools for macOS?” ShiftIt is ranked 50th while Disk Inventory X is ranked 53rd.
Ranked in these QuestionsQuestion Ranking
Pro Easy to configure
ShiftIt is configured through a simple UI where you simply press the hotkeys you wish to map to a certain action.
ShiftIt is very straight-forward to use for most frequent usages.
Pro Open source
Pro Free & Open Source
It is absolutely free and released under the GPL.
Pro Allows ordering disk by size
This way you can find what is taking most of the space.
Pro Offers choice between analyzing whole disk or just a specific folder
Con A little slow
Similar to Spectacle, but it has a few more features, such as being able to pick the size adjustment increments. Spectacle was a little faster, though. Repeated size changes or moves in succession can cause it to wait for it to complete.
Con Imprecise when readjusting sizes
Con Doesn't support moving windows between workspaces
There's no way to move a window to a different workspace with hotkeys in ShiftIt.
Con Crashes on Sierra
Crashes on Sierra when resizing windows