Choose by workflow
A free Mac maintenance suite with storage analysis, duplicates, and app management. 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.
People who want saved storage history or a companion on iPhone/iPad.
Mac users who prefer rectangular views and age-based browsing.
Apple Silicon users on macOS 26+ who want two maps and staged cleanup.
Scroll across to compare
| Feature | diCleaner | NullDisk |
|---|---|---|
| Best fit | Mac users seeking free storage analysis alongside broader maintenance tools. | Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports. |
| Visualization | Storage overview, file categories, and maintenance lists | Radial map, treemap, and file list; CLI terminal treemap |
| Platforms and requirements | macOS 11.5+ | Mac app: macOS 14+; CLI: macOS, Linux, Windows |
| Pricing and editions | Vendor says free to use with all current features included. | 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 | No automatic deletion after scanning; most tools use Trash by default. Secure Remove and Trash emptying are permanent. | Review source and action: local Trash, explicit permanent removal, or backup/delete; remote and cloud actions depend on the destination. |
| Reports and portability | The cited pages do not establish scan-report export. Keep any important history or paths before rescanning; retain the original files until decisions are verified. | CLI produces JSON/NDJSON scan reports. Third-party scan files are not directly imported into the Mac GUI. |
The cited pages do not establish scan-report export. Keep any important history or paths before rescanning; retain the original files until decisions are verified.
Mac users seeking free storage analysis alongside broader maintenance tools. 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.