For macOS 26 · Apple Silicon

Delve sees what's
eating your disk.

The disk visualizers worth using on the Mac run from ten to thirty dollars, and a few hide the cleanup behind the purchase. Delve is $4.99, paid once, and you can run the whole thing free for two weeks first: point it at any drive, watch it map every file in seconds, and see exactly where your space went.

Download for Mac Buy a license

14-day free trial, then $4.99 · Direct download · Notarized · Auto-updating

A real squarified treemap, rendered live in your browser inside a mockup of the Mac app. The shipping app draws the same picture on the GPU at 60 Hz with two million tiles.

01 Why we built this

We tried every disk visualizer on the Mac before writing Delve. The best-looking one is paid, and hides file deletion behind the purchase. The free ones are a bare list, or a treemap that never quite caught up to modern macOS. And almost none of them did the APFS math honestly: they'd promise back 87 GB from an Xcode folder that, after the copy-on-write accounting settled, would free closer to 12.

WinDirStat, the Windows tool from 2003, is still the gold standard for the picture itself. We rebuilt that picture in Swift and Metal, with honest accounting and the Apple plumbing the genre was missing. It's $4.99, paid once, and free to try for two weeks. If you're weighing your options, we wrote a roundup of the best Mac disk analyzers, plus honest comparisons with DaisyDisk, GrandPerspective, and OmniDiskSweeper, plus notes for anyone searching for WinDirStat or WizTree on the Mac. The long version of how Delve works lives in the build notes.

02 What you actually get

Free up gigabytes in minutes

Delve surfaces the biggest files and folders the moment the scan starts. Most people reclaim 20–100 GB the first time they open it.

Find the hogs you forgot about

Old iOS backups, node_modules, Xcode DerivedData, leftover video exports, Mail attachments, Docker volumes. The stuff that never shows up in About This Mac.

Delete without fear

Space-bar for Quick Look, right-click to reveal in Finder, drag to Trash. Nothing moves until you say so, and everything goes through the standard Trash so you can undo.

Fast on big drives

A 1 TB volume with a few million files finishes in under 90 seconds on a base M2, using getattrlistbulk to pull a directory of metadata per syscall instead of one entry at a time.

Counts space the way macOS does

Clones, hardlinks, and iCloud placeholders are handled correctly. Every inode tallied once, logical and on-disk size side by side. No phantom gigabytes, no numbers that disagree with Finder.

Plays nicely with the Mac

Spotlight finds the largest files in Downloads without opening the app. Shortcuts can chain Delve into your own automations. Full VoiceOver and keyboard navigation, with rotors for largest items, by extension, and by depth.

Every drive you can mount

Internal SSDs, external disks, Time Machine volumes, network shares, even iCloud Drive. If Finder can see it, Delve can map it.

Yours, once you buy it

No subscription, no account, no telemetry you didn't opt into. Pay $4.99 once and it's yours, and the scan never leaves your machine.

03 Honest about your disk

APFS files can share storage. When you duplicate a 4 GB iOS DeviceSupport bundle, APFS clones it: the new file points at the same blocks. Both files report 4 GB logical size. Together they take ~4 GB on disk, not 8. Same for hardlinks and iCloud dataless stubs. Delve does the bookkeeping, so the numbers you act on are the numbers you'll actually recover.

/Library/Developer/Xcode/iOS DeviceSupport
logical87.4 GB on disk, after clone dedup12.1 GB

You'd save 12.1 GB deleting this, not 87. The rest are APFS clones sharing the same blocks.

~/iCloud Drive/Documents · dataless stubs
logical (if materialized)142.6 GB on disk (cloud stubs)8 MB

Cloud stubs detected and tagged with a cloud glyph. We never accidentally materialize a file just to read its size.

The long form on hit-testing, cushion shading, and the bulk-stat trick lives in the architecture post.

04 Your filesystem stays on your machine

Delve needs Full Disk Access to do its job. Every byte on your disk is the whole point. None of it leaves your computer. None of it touches a server. We don't have a server.

Anonymous app analytics only: version, OS, crash counts, aggregate feature usage. Never a file name, path, hash, or extension breakdown. Your filesystem is none of our business.

05 Common questions

How much does Delve cost?

$4.99, paid once. There's a 14-day free trial with every feature unlocked and no card needed to start. After that, one payment unlocks Delve for good, deletion included, with free updates and no subscription. The full breakdown is on the pricing page.

Does Delve work on Intel Macs or older macOS?

No. Delve needs macOS 26 and Apple Silicon. On an Intel Mac or older macOS, GrandPerspective and OmniDiskSweeper are free alternatives that still run.

Is Delve on the Mac App Store?

No, on purpose. The App Store requires sandboxing, and a sandboxed app can't see most of your disk, which defeats the point of a disk scanner. Delve is a notarized direct download with signed auto-updates: the same security level, without the lobotomy.

Does Delve send my files anywhere?

No. Delve needs Full Disk Access to do its job, but nothing leaves your machine. There's no server. Optional anonymous analytics cover version, OS, and aggregate feature usage only, never a file name, path, or extension.

How is Delve different from DaisyDisk?

Delve is $4.99 with a 14-day free trial and includes deletion, draws a treemap, and shows on-disk versus logical size with APFS clones deduped. DaisyDisk is $9.99 with deletion behind the purchase, draws a sunburst, and runs on Intel and older macOS. The full Delve vs DaisyDisk breakdown is here.

∞ Try it free for 14 days

Download for Mac Buy a license

macOS 26+ · Apple Silicon · 14-day free trial, then $4.99 · See pricing · Notarized

Curious how it works? Read the build notes. Bug reports and feature requests: support@khaosstudio.com or our Discord.