Which fits your needs?
GrandPerspective: People who want a free, inspectable treemap and reusable scan records.
Space Lens (CleanMyMac): Existing CleanMyMac users who want visual disk exploration within their suite.
Features, pricing, and workflow
Scroll across to compare
| Feature | GrandPerspective | Space Lens (CleanMyMac) |
|---|---|---|
| Best fit | People who want a free, inspectable treemap and reusable scan records. | Existing CleanMyMac users who want visual disk exploration within their suite. |
| Visualization | Treemap with configurable colors and filters | Bubble-map storage explorer |
| Platforms and requirements | macOS 14+ (current release) | macOS |
| Pricing and editions | Free from SourceForge; the same app is $2.99 in the US App Store. | Part of CleanMyMac; check current subscription/one-time plans and edition availability. |
| Open source | Yes | No |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Delete files or folders from the view; review selection and deletion preferences. | Add selections to the cleanup list, review them, then run the module’s removal action. |
| Reports and portability | Save the scan for reopening in GrandPerspective, or export text and images. NullDisk does not import GrandPerspective scan files; retain exports and rescan the same location. | Keep screenshots and paths from Space Lens. The cited manual does not establish report interoperability with NullDisk. |
GrandPerspective: what stands out
A good fit for people who want a free, inspectable treemap and reusable scan records.
GrandPerspective: strengths
- Configurable colors, masks, searches, and scan exclusions
- Quick Look, Finder integration, and file/folder deletion
- Save/reload scans and export text or images
Considerations
- Treemap rather than radial navigation
- Older macOS versions require an older release
- App Store updates can follow SourceForge releases later
Space Lens (CleanMyMac): what stands out
A good fit for existing CleanMyMac users who want visual disk exploration within their suite.
Space Lens (CleanMyMac): strengths
- Bubble visualization of local and external storage
- Folder-by-folder browsing and a reviewed removal list
- Part of the broader CleanMyMac maintenance suite
Considerations
- A suite module rather than a standalone purchase
- Check module availability in your CleanMyMac edition
- Suite licensing may be more than needed for disk analysis alone
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 GrandPerspective?
A good fit for people who want a free, inspectable treemap and reusable scan records. Free from SourceForge; the same app is $2.99 in the US App Store.
When should I choose Space Lens (CleanMyMac)?
A good fit for existing CleanMyMac users who want visual disk exploration within their suite. Part of CleanMyMac; check current subscription/one-time plans and edition availability.
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.