Feature comparison

Nektony Disk Space Analyzer Pro vs NullDisk

The paid App Store analyzer with collections, Quick Look, and file actions. Native Mac disk maps with SSH/cloud sources, development cleanup, and a separate CLI. See how their platforms, views, and cleanup workflows fit the way you work.

Sunburst / MixedPaid / Free

Which fits your needs?

Nektony Disk Space Analyzer Pro: People who prefer an upfront App Store purchase with visual analysis and collections.

NullDisk: Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.

Features, pricing, and workflow

Scroll across to compare

FeatureNektony Disk Space Analyzer ProNullDisk
Best fitPeople who prefer an upfront App Store purchase with visual analysis and collections.Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.
VisualizationSunburst, file directories, and largest-items listRadial map, treemap, and file list; CLI terminal treemap
Platforms and requirementsmacOSMac app: macOS 14+; CLI: macOS, Linux, Windows
Pricing and editionsUS Mac App Store lists $19.99 upfront; check your region’s current listing.Direct Mac edition free with reminders; optional $9.99 one-time personal license or team seat removes reminders. App Store terms are separate.
Open sourceNoNo
Native macOS UIYesYes
Cleanup workflowCollect selected files and folders, then move or remove them; check the current removal dialogue.Review source and action: local Trash, explicit permanent removal, or backup/delete; remote and cloud actions depend on the destination.
Reports and portabilityThe App Store description does not establish scan-report export. Preserve paths and collection decisions before a fresh NullDisk scan.CLI produces JSON/NDJSON scan reports. Third-party scan files are not directly imported into the Mac GUI.

Nektony Disk Space Analyzer Pro: what stands out

A good fit for people who prefer an upfront App Store purchase with visual analysis and collections.

Nektony Disk Space Analyzer Pro: strengths

  • Sunburst, largest-items list, and Quick Look
  • Collect items for moving or removing
  • Scans external storage and accessible cloud folders

Considerations

  • Paid edition distinct from the free-download listing
  • Access depends on macOS permissions and chosen scan locations
  • A cloud-folder scan is not proof of direct provider-account access

Full product guide → · Alternatives →

NullDisk: what stands out

A good fit for Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports.

NullDisk: strengths

  • Radial and treemap views with local, SSH, and cloud sources
  • Git-aware development cleanup for generated output and eligible worktrees
  • Native Mac UI plus terminal UI and JSON/NDJSON CLI reports

Considerations

  • Desktop GUI requires macOS 14+; Linux/Windows use the separate CLI
  • Mac app sends anonymous usage telemetry; no in-app opt-out at this review
  • No content-based duplicate finder; allocated bytes are not a guaranteed recovery total

NullDisk features →

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 Nektony Disk Space Analyzer Pro?

A good fit for people who prefer an upfront App Store purchase with visual analysis and collections. US Mac App Store lists $19.99 upfront; check your region’s current listing.

When should I choose NullDisk?

A good fit for Mac users managing local/remote storage, and developers who need Git-aware cleanup or scriptable disk reports. Direct Mac edition free with reminders; optional $9.99 one-time personal license or team seat removes reminders. App Store terms are separate.

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.

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