Which fits your needs?
GrandPerspective: People who want a free, inspectable treemap and reusable scan records.
Klarity Disk: Mac users who prefer rectangular views and age-based browsing.
Features, pricing, and workflow
Scroll across to compare
| Feature | GrandPerspective | Klarity Disk |
|---|---|---|
| Best fit | People who want a free, inspectable treemap and reusable scan records. | Mac users who prefer rectangular views and age-based browsing. |
| Visualization | Treemap with configurable colors and filters | Treemap, icicle view, and Large Files list |
| 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. | Vendor lists $6.99 once through the Mac App Store. |
| Open source | Yes | No |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Delete files or folders from the view; review selection and deletion preferences. | Moves items to Trash; folders of 1 GB or more require slide confirmation. |
| 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. | Report export is not established by the cited overview. Preserve paths or screenshots if you need a record outside the app. |
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
Klarity Disk: what stands out
A good fit for Mac users who prefer rectangular views and age-based browsing.
Klarity Disk: strengths
- Treemap and icicle layouts with age-based colors
- Large Files list and hidden Library visibility
- Trash-only removal with extra confirmation for large folders
Considerations
- No sunburst in the documented view selection
- Age indicates modification history, not whether a file is unnecessary
- System-folder guards intentionally limit removal
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 Klarity Disk?
A good fit for Mac users who prefer rectangular views and age-based browsing. Vendor lists $6.99 once through the Mac App Store.
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.