Which fits your needs?
Nektony Disk Space Analyzer Pro: People who prefer an upfront App Store purchase with visual analysis and collections.
OmniDiskSweeper: Mac users who prefer a free size-sorted browser to a chart.
Features, pricing, and workflow
Scroll across to compare
| Feature | Nektony Disk Space Analyzer Pro | OmniDiskSweeper |
|---|---|---|
| Best fit | People who prefer an upfront App Store purchase with visual analysis and collections. | Mac users who prefer a free size-sorted browser to a chart. |
| Visualization | Sunburst, file directories, and largest-items list | Largest-first column browser |
| Platforms and requirements | macOS | macOS |
| Pricing and editions | US Mac App Store lists $19.99 upfront; check your region’s current listing. | Free download from The Omni Group. |
| Open source | No | No |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Collect selected files and folders, then move or remove them; check the current removal dialogue. | Open or Trash selected files from the size-sorted browser. |
| Reports and portability | The App Store description does not establish scan-report export. Preserve paths and collection decisions before a fresh NullDisk scan. | The official overview does not document report export. Keep important paths separately before rescanning in NullDisk. |
Nektony Disk Space Analyzer Pro: what stands out
A good fit for people who prefer an upfront App Store purchase with visual analysis and collections.
Nektony Disk Space Analyzer Pro: strengths
- Sunburst, largest-items list, and Quick Look
- Collect items for moving or removing
- Scans external storage and accessible cloud folders
Considerations
- Paid edition distinct from the free-download listing
- Access depends on macOS permissions and chosen scan locations
- A cloud-folder scan is not proof of direct provider-account access
OmniDiskSweeper: what stands out
A good fit for Mac users who prefer a free size-sorted browser to a chart.
OmniDiskSweeper: strengths
- Largest-first file and folder browsing
- Open items or move them to Trash
- Official downloads include versions for older Macs
Considerations
- Column browsing rather than a graphical disk map
- Check the download requirements for your macOS version
- The cited overview does not document saved reports or duplicate matching
For a useful comparison on your own drive, match the scan root, access permissions, and size mode. Chart style changes how you explore the results; it does not by itself establish measurement accuracy.
Common questions
When should I choose Nektony Disk Space Analyzer Pro?
A good fit for people who prefer an upfront App Store purchase with visual analysis and collections. US Mac App Store lists $19.99 upfront; check your region’s current listing.
When should I choose OmniDiskSweeper?
A good fit for Mac users who prefer a free size-sorted browser to a chart. Free download from The Omni Group.
Will both apps show the same size?
Not necessarily. Match the scan root, permissions, exclusions, and logical/allocated-size mode. Hard links, APFS clones, snapshots, sparse files, and cloud placeholders can change totals. A reported size is not a guaranteed amount recovered after deletion.