Which fits your needs?
Space Lens (CleanMyMac): Existing CleanMyMac users who want visual disk exploration within their suite.
WhatSize: Mac users who favor column browsing and integrated duplicate/cleanup tools.
Features, pricing, and workflow
Scroll across to compare
| Feature | Space Lens (CleanMyMac) | WhatSize |
|---|---|---|
| Best fit | Existing CleanMyMac users who want visual disk exploration within their suite. | Mac users who favor column browsing and integrated duplicate/cleanup tools. |
| Visualization | Bubble-map storage explorer | Size-sorted columns and measurement views |
| Platforms and requirements | macOS | macOS 11+ (current vendor requirements) |
| Pricing and editions | Part of CleanMyMac; check current subscription/one-time plans and edition availability. | Vendor lists $14.99 and a 30-day trial; upgrades may be priced separately. |
| Open source | No | No |
| Native macOS UI | Yes | Yes |
| Cleanup workflow | Add selections to the cleanup list, review them, then run the module’s removal action. | Review the chosen cleaning or duplicate action before applying it. |
| Reports and portability | Keep screenshots and paths from Space Lens. The cited manual does not establish report interoperability with NullDisk. | Preserve any saved measurements or reports supported by your version. The cited overview does not establish an import format shared with NullDisk. |
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
WhatSize: what stands out
A good fit for Mac users who favor column browsing and integrated duplicate/cleanup tools.
WhatSize: strengths
- Size-sorted columns and detailed filtering
- Duplicate-file tools and cleanup categories
- Updates measurements as the filesystem changes
Considerations
- Paid license after the trial
- Cleanup categories still require your judgment
- Check upgrade terms separately from the initial purchase
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 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.
When should I choose WhatSize?
A good fit for Mac users who favor column browsing and integrated duplicate/cleanup tools. Vendor lists $14.99 and a 30-day trial; upgrades may be priced separately.
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.