Which fits your needs?
Disk Graph: People who want saved storage history or a companion on iPhone/iPad.
OmniDiskSweeper: Mac users who prefer a free size-sorted browser to a chart.
Features, pricing, and workflow
Scroll across to compare
| Feature | Disk Graph | OmniDiskSweeper |
|---|---|---|
| Best fit | People who want saved storage history or a companion on iPhone/iPad. | Mac users who prefer a free size-sorted browser to a chart. |
| Visualization | Radial pie chart, treemap, and snapshot sequences | Largest-first column browser |
| Platforms and requirements | macOS, iOS, iPadOS | macOS |
| Pricing and editions | Commercial app; check current developer and App Store purchase options. | Free download from The Omni Group. |
| Open source | No | No |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Preview, reveal, or move selected items to the bin. | Open or Trash selected files from the size-sorted browser. |
| Reports and portability | Export a snapshot and keep it: the developer documents JSON/TSV records that can be viewed in a text editor. NullDisk does not import these snapshots. | The official overview does not document report export. Keep important paths separately before rescanning in NullDisk. |
Disk Graph: what stands out
A good fit for people who want saved storage history or a companion on iPhone/iPad.
Disk Graph: strengths
- Switch between radial charts and treemaps
- Logical size, allocated size, or file-count modes
- Export snapshots and animate changes across a sequence
Considerations
- Mobile scans cover locations accessible through Files
- Snapshots record inventory, not backed-up file contents
- Historical snapshots need a fresh scan before cleanup
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 Disk Graph?
A good fit for people who want saved storage history or a companion on iPhone/iPad. Commercial app; check current developer and App Store purchase options.
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.