Laying out the streets…STEP 1 OF 3

Cloister · Office #66,878

Block websites on Mac, apps and sites on iPhone and iPad

In the Habits and focus neighborhood (Personal). In town since 8 Nov 2026.

Nobody has claimed this office yet. Tablif records every new product and gives it an office; when its owner claims it, the lights go on.

Is this yours? Claim it

What Tablif read on Cloister's site

Cloister describes itself as: “Cloister — a website blocker for Mac you can't turn off”

What it is

Calls itself “website blocker”.

  • Calls itself: website blocker
“…website blocker for Mac”

Where it puts itself

Rules out “account” and “analytics”. Publishes a comparison page.

  • Says it will not: account · analytics
“No account, no tracking”
“No analytics or crash reporter in the app.”

What it costs

One-time purchase, monthly subscription and yearly plan. A free tier, free forever. Trial: “14-day”. Prices quoted: €39, €49, €79.

  • One-time: yes
  • Monthly: yes
  • Yearly: yes
  • Free plan: free forever
  • Price: €39 · €49 · €79
  • Trial: 14-day
“One Mac Every feature, on the Mac you work on. €39”
“Two Macs The same, for a desk and a laptop. €49”
“Lifetime Best value Two Macs, and every update Cloister ever ships. €79 Launch price · rising to €99”

Who it sells to

Sells to consumers. Made for student.

  • Sells to: consumers
  • Made for: student
“Cloister is for holding yourself to your own plan, on your own Mac — not for supervising someone else's.”
“For students Study sessions you can't talk yourself out of”

How it runs

A desktop app and mobile app for iOS and macOS. Runs locally and works offline. Distributed through the App Store.

  • Kind: desktop · mobile
  • Runs on: iOS · macOS
  • Runs where: on the device, offline
  • Distributed via: App Store
“Cloister blocks websites on your Mac until the timer ends”
“On iPhone, iPhone Duo and iPad it blocks apps and websites”

What it works with

Replaces Cold Turkey and SelfControl. Names Chrome, Firefox and 3 more on its pages.

  • Replaces: Cold Turkey · SelfControl
  • Names: Chrome · Firefox · Safari · +2
“Safari, Chrome, Firefox.”
“Cloister blocks websites on your Mac until the timer ends”

What it offers as proof

Live, no waitlist. Try it without signing up. Publishes docs.

  • Instant signup: yes
  • Trial asks for: nothing
“Download for macOS”
“Download it from this page on your Mac.”

Sources

Tablif read these pages, last on 8 Nov 2026. Everything above is what the product says about itself; Tablif does not verify every claim.

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