Choose by workflow
An age-colored treemap and icicle view with guarded Trash 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 favor column browsing and integrated duplicate/cleanup tools.
People who want saved storage history or a companion on iPhone/iPad.
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 | Klarity Disk | NullDisk |
|---|---|---|
| Best fit | Mac users who prefer rectangular views and age-based browsing. | Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports. |
| Visualization | Treemap, icicle view, and Large Files 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 | Vendor lists $6.99 once through the Mac App Store. | 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 | Moves items to Trash; folders of 1 GB or more require slide confirmation. | Review source and action: local Trash, explicit permanent removal, or backup/delete; remote and cloud actions depend on the destination. |
| Reports and portability | Report export is not established by the cited overview. Preserve paths or screenshots if you need a record outside the app. | CLI produces JSON/NDJSON scan reports. Third-party scan files are not directly imported into the Mac GUI. |
Report export is not established by the cited overview. Preserve paths or screenshots if you need a record outside the app.
Mac users who prefer rectangular views and age-based browsing. 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.