Which fits your needs?
Delve: Apple Silicon users on macOS 26+ who want two maps and staged cleanup.
GrandPerspective: People who want a free, inspectable treemap and reusable scan records.
Features, pricing, and workflow
Scroll across to compare
| Feature | Delve | GrandPerspective |
|---|---|---|
| Best fit | Apple Silicon users on macOS 26+ who want two maps and staged cleanup. | People who want a free, inspectable treemap and reusable scan records. |
| Visualization | Treemap, sunburst, and file list | Treemap with configurable colors and filters |
| Platforms and requirements | macOS 26+, Apple Silicon | macOS 14+ (current release) |
| Pricing and editions | Vendor lists $4.99 once after a 14-day trial. | Free from SourceForge; the same app is $2.99 in the US App Store. |
| Open source | No | Yes |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Stage items in the Collector, then send the reviewed batch to Trash. | Delete files or folders from the view; review selection and deletion preferences. |
| Reports and portability | The developer documents exporting maps as posters with Command-Shift-E. Keep that image as a reference; it is not a scan file that NullDisk can import. | 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. |
Delve: what stands out
A good fit for Apple Silicon users on macOS 26+ who want two maps and staged cleanup.
Delve: strengths
- Treemap, sunburst, and file list
- Logical and on-disk measurement with filtering
- Quick Look, collector-to-Trash, and map image export
Considerations
- Requires macOS 26 or later
- Apple Silicon only in the current requirements
- A map export is a visual record, not a file backup
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
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 Delve?
A good fit for Apple Silicon users on macOS 26+ who want two maps and staged cleanup. Vendor lists $4.99 once after a 14-day trial.
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.
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.