Choose by workflow
Pie charts, treemaps, and portable snapshots for tracking storage changes. 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 favor column browsing and integrated duplicate/cleanup tools.
Mac users who prefer rectangular views and age-based browsing.
Apple Silicon users on macOS 26+ who want two maps and staged cleanup.
Mac users seeking free storage analysis alongside broader maintenance tools.
Scroll across to compare
| Feature | Disk Graph | NullDisk |
|---|---|---|
| Best fit | People who want saved storage history or a companion on iPhone/iPad. | Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports. |
| Visualization | Radial pie chart, treemap, and snapshot sequences | Radial map, treemap, and file list; CLI terminal treemap |
| Platforms and requirements | macOS, iOS, iPadOS | Mac app: macOS 14+; CLI: macOS, Linux, Windows |
| Pricing and editions | Commercial app; check current developer and App Store purchase options. | 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 | Preview, reveal, or move selected items to the bin. | Review source and action: local Trash, explicit permanent removal, or backup/delete; remote and cloud actions depend on the destination. |
| 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. | CLI produces JSON/NDJSON scan reports. Third-party scan files are not directly imported into the Mac GUI. |
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.
People who want saved storage history or a companion on iPhone/iPad. 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.