Which fits your needs?
Space Radar: Developers exploring alternative visualizations and an inspectable codebase.
SquirrelDisk: People wanting a free open-source GUI across desktop systems and remote storage.
Features, pricing, and workflow
Scroll across to compare
| Feature | Space Radar | SquirrelDisk |
|---|---|---|
| Best fit | Developers exploring alternative visualizations and an inspectable codebase. | People wanting a free open-source GUI across desktop systems and remote storage. |
| Visualization | Sunburst, treemap, and flamegraph | Sunburst, treemap, file list, and duplicates |
| Platforms and requirements | macOS, Windows, Linux (check current packages) | macOS, Windows, Linux |
| Pricing and editions | Free under the MIT license; check repository build/release instructions. | Free; AGPL-3.0 source published on GitHub. |
| Open source | Yes | Yes |
| Native macOS UI | Cross-platform interface | Cross-platform interface |
| Cleanup workflow | The project documents context-menu actions to locate, open, and delete files or directories; confirm recovery behavior in the selected build. | Collector offers Trash, permanent removal, secure erase, or backup before deletion. |
| Reports and portability | Consult the exact build’s save/export controls. Keep any generated data and images; NullDisk does not document importing Space Radar sessions. | The current overview does not establish an interoperable scan-report format. Preserve paths, duplicate decisions, and remote source settings separately. |
Space Radar: what stands out
A good fit for developers exploring alternative visualizations and an inspectable codebase.
Space Radar: strengths
- Sunburst, treemap, and flamegraph visualizations
- MIT-licensed source for inspection and modification
- Disk and memory visualization in one project
Considerations
- Packaging and dependencies vary across repository versions
- Check the current release for your OS and CPU
- Do not infer cleanup or report formats from the chart selection
SquirrelDisk: what stands out
A good fit for people wanting a free open-source GUI across desktop systems and remote storage.
SquirrelDisk: strengths
- Live maps and a staged removal collector
- Content-based duplicate search
- SSH and rclone-backed cloud storage
Considerations
- Uses a cross-platform Rust interface rather than SwiftUI
- Permanent deletion and secure erase require deliberate review
- Cloud/SSH actions depend on provider and remote-system support
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 Space Radar?
A good fit for developers exploring alternative visualizations and an inspectable codebase. Free under the MIT license; check repository build/release instructions.
When should I choose SquirrelDisk?
A good fit for people wanting a free open-source GUI across desktop systems and remote storage. Free; AGPL-3.0 source published on GitHub.
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.