Which fits your needs?
Diskaroo: Users wanting one account-based analyzer across Mac, Windows, and Linux.
NullDisk: Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.
Features, pricing, and workflow
Scroll across to compare
| Feature | Diskaroo | NullDisk |
|---|---|---|
| Best fit | Users wanting one account-based analyzer across Mac, Windows, and Linux. | Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports. |
| Visualization | Treemap, sunburst, largest-items list, and duplicates | Radial map, treemap, and file list; CLI terminal treemap |
| Platforms and requirements | macOS 14+, Windows 10/11 x64, Linux x64 | Mac app: macOS 14+; CLI: macOS, Linux, Windows |
| Pricing and editions | Vendor currently offers lifetime Pro free with a Bravely Account; sign-in is required. | 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 | Cross-platform interface | Yes |
| Cleanup workflow | Confirmed collector action: Trash/Recycle Bin or permanent deletion. Duplicates use Trash/Recycle Bin. | Review source and action: local Trash, explicit permanent removal, or backup/delete; remote and cloud actions depend on the destination. |
| Reports and portability | The vendor describes recent locations, not an interoperable report format. Preserve paths and collector selections separately before rescanning. | CLI produces JSON/NDJSON scan reports. Third-party scan files are not directly imported into the Mac GUI. |
Diskaroo: what stands out
A good fit for users wanting one account-based analyzer across Mac, Windows, and Linux.
Diskaroo: strengths
- Treemap, sunburst, filters, and largest-items list
- Collector with Trash/Recycle Bin or explicit permanent removal
- Content-based duplicates; Quick Look on Mac
Considerations
- Requires an account before the first scan
- Current free offer depends on claiming Pro in the app
- Linux build requirements include GTK 4
NullDisk: what stands out
A good fit for Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.
NullDisk: strengths
- Radial and treemap views with local, SSH, and cloud sources
- Git-aware development cleanup for generated output and eligible worktrees
- Native Mac UI plus terminal UI and JSON/NDJSON CLI reports
Considerations
- Desktop GUI requires macOS 14+; Linux/Windows use the separate CLI
- Mac app sends anonymous usage telemetry; no in-app opt-out at this review
- No content-based duplicate finder; allocated bytes are not a guaranteed recovery total
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 Diskaroo?
A good fit for users wanting one account-based analyzer across Mac, Windows, and Linux. Vendor currently offers lifetime Pro free with a Bravely Account; sign-in is required.
When should I choose NullDisk?
A good fit for Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports. Direct Mac edition free with reminders; optional $9.99 one-time personal license or team seat removes reminders. App Store terms are separate.
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.