Now on Android

Replace porn
with exercise.

When the urge hits, Cairn makes you move first. Twenty push-ups, then it's your call. Your phone's camera counts every rep. No willpower required.

Get it on Google Play See how it works

7-day free trial. No account needed. Nothing leaves your phone.

Cairn intercepts the urge with a push-up prompt
01 The cycle

You've tried willpower. It doesn't work.

Blockers get uninstalled. Promises get broken. The urge comes back stronger. Cairn doesn't ask you to fight it. It redirects it.

  1. 01 You say "just five minutes." You lose half an hour.
  2. 02 You've installed blockers. You uninstalled them within a week.
  3. 03 The guilt afterwards feels worse than the urge before.
  4. 04 You've said "this is the last time" more times than you can count.
02 How Cairn works

Three steps. Zero willpower.

The urge doesn't disappear because you're locked out. It disappears because you physically exhausted it. Exercise releases dopamine naturally. You're not fighting the craving. You're replacing it.

STEP 01

Cairn catches it

When you head to a site you shouldn't, Cairn intercepts automatically. No walls. Just a challenge.

STEP 02

You move

Twenty push-ups, squats, planks, or burpees. Your camera counts every rep with AI pose detection.

STEP 03

You decide

After the exercise, the choice is yours. Most people don't go back. The urge is already gone.

03 Why Cairn is different

Not a blocker. A redirector.

Every other app builds a wall. Cairn doesn't block the urge. It exhausts it through movement. That's the whole idea.

  • YESCamera counts real reps. No cheating.
  • YESIntercepts automatically when you open porn.
  • YESFour exercises: push-ups, squats, planks, burpees.
  • YES100% on-device. Nothing recorded, ever.
  • NOAccounts, servers, or data collected.
  • NOAnalytics, tracking, or ads.
Real person doing push-ups with AI pose skeleton tracking overlay

On-device pose detection. Real reps. Real friction.

04 The app

Built like a field journal.

Dark, grounded, serious. No cartoon mascots. No gimmicks. Just a clean tool that does one thing well.

Sound familiar onboarding
Home dashboard with streak
Exercise interception prompt
Track your streak day by day
05 Privacy

Your data never leaves your phone.

No accounts. No servers. No analytics. The camera processes frames in real-time and never records. Your browsing activity is checked locally and immediately discarded. We literally cannot see what you do.

Read the full privacy policy →

Start your first stone today.

Seven days free. Then $8.99/month or $39.99/year. Cancel anytime.

Get it on Google Play

Coming soon to iOS.