The Mac cleaner for vibe coders

You made an app. Your Mac made 47 GB of leftovers.

You don't need to know what node_modules is. 9ulp knows what belongs to your projects, what can grow back, and what should be left alone.

Let 9ulp take a look See a safe cleanup

runs 100% on your mac ・ nothing uploaded ・ notarized by apple

Where did all that space go?

  • node_modules
  • DerivedData
  • .venv
  • Docker
  • Ollama models
  • Simulators

Every gigabyte gets a plain-language story.

First, the project. Then, the evidence that makes cleanup a clear decision.

9ulpExample cleanup results
  • Weekend SaaSIdle for 84 days

    Packages downloaded for this project node_modules

    Reinstalls from the lockfile — the saved list of package versions.

    Verified generated packages; no process is using them. Move to Trash first and keep the source code.

    19.2 GB Eat now
  • Client websiteActive today

    Files generated while building the site .next

    Rebuildable, but the development server is using them now.

    A running project was detected. Keep these files to avoid interrupting your work.

    6.4 GB Hands off
  • Local AI assistantLast used 21 days ago

    An AI model downloaded to your Mac Ollama · qwen3:14b

    Available to download again — about 8.1 GB to fetch.

    You may still need it offline. Review it yourself; it is never preselected.

    8.1 GB Look first

Illustrative amounts; your scan will differ. Space is freed after you empty Trash.

9ulp knows what it can eat.

The same example, sorted three ways. Each with a reason.

Eat now

19.2 GB

Rebuildable, inactive, and moved to Trash first.

Look first

8.1 GB

Potentially large or slow to download again; you decide.

Hands off

6.4 GB

Active, source material, or not proven safe.

Not vibe coding today? 9ulp still gets hungry.

Find the files and caches that build up in everyday use. Review them, then choose what you no longer need.

  • Screenshots
  • Duplicates
  • Old downloads
  • Large files
  • App caches

your data stays on your mac

9ulp needs nothing beyond your account email. Scanning, analysis and cleanup all happen locally.

100% on-device

Every scan and cleanup runs on your Mac. No cloud, no server ever looks at your files.

nothing is uploaded

File contents, lists and scan results never leave this computer. Only your sign-up email is used — for downloads and update notices.

permissions stay local

Full Disk Access just lets 9ulp read your disk to find junk — it only touches caches and trash, never your personal files, and never sends them anywhere.

notarized by Apple

Every build is signed with a Developer ID and scanned by Apple's notary for malware before it reaches you.

no tracking, no analytics, no leaks — 9ulp eats junk, not your data.

Pricing

The free tier shows you everything and clears what's safe. Paying unlocks the half that needs judgement.

Free

US$0

  • Full scan and space breakdown
  • Clean everything marked safe to eat
  • See exactly what it will never touch
Download

Lifetime

US$29.99 one-time

  • Everything in Free
  • Clean “have a look” items
  • Duplicates, screenshots, developer deep scan
Buy

Autopilot

US$29 per year

  • Everything in Lifetime
  • Scheduled background cleaning
  • Monthly reclaimed-space report
Buy

Lifetime buys the tool. Autopilot adds the service that keeps clearing space in the background. Anyone who bought Lifetime before this change keeps automatic cleaning for good.

Download 9ulp

Sign up or log in to download the latest version.

it all runs on your mac. nothing leaves — 9ulp eats junk, not your data.

By signing up you agree we'll use your email only for downloads and important release notices.

FAQ

Why does macOS say the developer can't be verified?

It's notarized by Apple, so just open the DMG, drag it to Applications, and launch — no security warning. All scanning and cleaning happen locally on your Mac.

Is cleaning safe? Could it delete something important?

Anything marked "safe to eat" is cache and logs that rebuild themselves. Items marked "have a look" (old downloads, iOS backups) are off by default and moved to the Trash, not deleted. Anything "not food" is never touched. It always confirms before feeding.

How is the usage summary generated?

9ulp looks at files and caches that changed recently and groups them by source. Everything is analyzed locally — nothing is uploaded.

How does the schedule work?

It uses macOS launchd to scan in the background on your chosen cadence (no need to keep the app open) and reminds you when there's more than your threshold to eat. Manage it in System Settings → General → Login Items.

Which Macs are supported?

macOS 13 Ventura or later, on both Apple Silicon (M series) and Intel.