Disk space and uninstaller apps for MacHead to head

DaisyDisk vs GrandPerspective

DaisyDisk ranks #1 and GrandPerspective ranks #2 in our guide to the best disk space and uninstaller apps for Mac. DaisyDisk is our pick for most people, and GrandPerspective is the best free option.

The Useful TechResearched and written with AI under our rulesUpdated 14 Oct 2026

Our pickDaisyDisk app iconDaisyDiskPick DaisyDisk if your Mac keeps saying the disk is almost full and you need to see why.$9.99 onceBest freeGrandPerspective app iconGrandPerspectivePick GrandPerspective if you want the same answer as DaisyDisk for free and don't mind a plainer block map.Free, open source

What decides it

  • GrandPerspective costs less over 3 years: Free, against $9.99 for DaisyDisk.
  • Both run on Mac.

Side by side

Prices are checked every day.

At a glanceDaisyDisk app iconDaisyDiskGrandPerspective app iconGrandPerspective
Price$9.99 once, from the developer or the Mac App StoreFree on SourceForge, or $2.99 on the Mac App Store
How you payPay onceFree
3 years of use$9.99Free Cheaper
Free trialYesFree to start
Runs onMacMac
Where to buyDeveloper, App StoreDeveloper, App Store
FeaturesFree trial, Family Sharing, PrivacyOpen source, Privacy, Family Sharing
Made bySoftware Ambience Corp.Erwin Bonsma
Last updated12 Oct 202619 Sept 2026

Who should get which

Get DaisyDisk if

You keep seeing the disk almost full warning and can't tell what is eating the space.

Get GrandPerspective if

Your Mac keeps warning the disk is nearly full and the Storage page won't tell you which files to blame.

Skip DaisyDisk if

You have plenty of free space, or you're fine reading GrandPerspective's free block map.

Skip GrandPerspective if

You just want a rough split between apps, photos and documents, which System Settings shows under Storage.

Our verdicts

DaisyDisk app iconDaisyDisk

The free trial already scans your whole drive and draws it as a clickable ring map, so you can find what is eating your space before you pay anything. Deleting from inside the app needs the $9.99 license, which covers up to 5 personal Macs, protects system files and breaks down the vague System Data number in macOS. GrandPerspective draws a similar map for free, but DaisyDisk's rings are much easier to drill into.

GrandPerspective app iconGrandPerspective

Free from SourceForge or $2.99 on the Mac App Store, this open source app draws your whole disk as a map of blocks sized by how much space each file takes, so the biggest space hogs stand out at once. The $2.99 only buys automatic updates, which makes the free download the cheapest way in. The current version needs macOS 14 or later, with older builds linked on the same page.

What each one helps you do

DaisyDisk app iconDaisyDisk

  • Find the biggest files on your Mac fast
  • Clear out space without touching system files
  • See what System Data is really made of
  • Check what fills an external or cloud drive

GrandPerspective app iconGrandPerspective

  • Find the biggest files on your disk
  • See which folders take the most space
  • Spot forgotten downloads and old videos

Where to get them

DaisyDisk

$9.99 once, from the developer or the Mac App Store

  • From the developerThe free trial scans your disk; deleting files needs a license
    $9.99Get it
  • Mac App Store
    $9.99Mac App Store

GrandPerspective

Free on SourceForge, or $2.99 on the Mac App Store

  • From the developerNeeds macOS 14 or later; older versions are linked on the same page
    FreeGet it
  • Mac App Store
    $2.99Mac App Store

Neither one quite right?

The other picks in our guide to the best disk space and uninstaller apps for Mac.

Read the full guideAll DaisyDisk alternativesAll GrandPerspective alternatives

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