Choose by workflow
The paid App Store analyzer with collections, Quick Look, and file actions. If you need something different, compare these five options by the job they do. Choose by platform, features, and how you prefer to review files.
Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.
Mac users who want a sunburst, cloud connections, and snapshot tools.
Mac users who want a sunburst and integrated file-management actions.
People who want a free, inspectable treemap and reusable scan records.
Mac users who prefer a free size-sorted browser to a chart.
Scroll across to compare
| Feature | Nektony Disk Space Analyzer Pro | NullDisk |
|---|---|---|
| Best fit | People who prefer an upfront App Store purchase with visual analysis and collections. | Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports. |
| Visualization | Sunburst, file directories, and largest-items list | Radial map, treemap, and file list; CLI terminal treemap |
| Platforms and requirements | macOS | Mac app: macOS 14+; CLI: macOS, Linux, Windows |
| Pricing and editions | US Mac App Store lists $19.99 upfront; check your region’s current listing. | Direct Mac edition free with reminders; optional $9.99 one-time personal license or team seat removes reminders. App Store terms are separate. |
| 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. | Review source and action: local Trash, explicit permanent removal, or backup/delete; remote and cloud actions depend on the destination. |
| Reports and portability | The App Store description does not establish scan-report export. Preserve paths and collection decisions before a fresh NullDisk scan. | CLI produces JSON/NDJSON scan reports. Third-party scan files are not directly imported into the Mac GUI. |
The App Store description does not establish scan-report export. Preserve paths and collection decisions before a fresh NullDisk scan.
People who prefer an upfront App Store purchase with visual analysis and collections. Keep it if that matches your needs. Consider a change for a specific requirement such as a different chart, remote sources, report exports, or development cleanup.
GrandPerspective and SquirrelDisk offer free open-source analysis. OmniDiskSweeper is free on Mac. All direct Mac features in NullDisk are free with reminders; reminder removal is optional. Freeware does not necessarily mean open source.
No. Keep any historical exports you need and run a fresh scan of the same location. NullDisk does not import these apps’ saved scans or cleanup queues.