Cairn: Quit Porn with Exercise

Cairn helps you quit porn by automatically interrupting protected adult sites with exercise.

When Cairn detects a protected site in a supported browser, it opens a movement challenge. Complete push-ups, squats, a plank, or jumping jacks while your phone's camera counts every rep with on-device pose detection. After the pause, you decide whether to leave or continue.

HOW CAIRN WORKS

1. Cairn catches a protected site automatically — no willpower needed
2. Complete a short exercise challenge — your camera counts every rep
3. Build your streak and move forward

ACCESSIBILITY SERVICE

Cairn uses Android's AccessibilityService API after you choose to enable Pause Detection. It uses URL-bar text in supported browsers to compare the displayed domain on your device with Cairn's protected-site list. When a match is found, Cairn replaces the protected tab with google.com and opens an exercise pause.

If you separately enable Commitment Mode, Accessibility also checks Cairn's Android App Info screen for an uninstall attempt and opens the same pause. Cairn uses only URL-bar text for site detection; it does not use webpage content, passwords, messages, or unrelated app content. URLs and matched domains are not stored or transmitted. Without Accessibility access, automatic Pause Detection and the optional Commitment Mode check do not work.

Cairn is built for men who want a private, practical way to reduce porn use, interrupt compulsive browsing, and replace screen-based dopamine with exercise.

KEY FEATURES

Automatic site interception
When you are about to slip, Cairn redirects you into movement. No lectures. No shame. Just a clear action. Cairn puts a physical pause between impulse and decision, at the exact moment it matters.

Camera rep counting
Cairn uses your phone camera to count reps in real time. Push-ups, squats, planks, and jumping jacks are supported. Cairn checks your movement and counts reps in real time. The camera feed is processed on your device and is never recorded.

Private streak tracking
Build a daily streak and watch your cairn grow over time. Each day you stay on track adds to your progress. Milestones at 1, 3, 7, 14, 30, and 90 days — each one earned.

Your Why
Choose the reason you want to quit. Cairn keeps it visible so you remember what you are protecting.

Simple habit tracking
See your week at a glance. Green days for progress. Gaps for missed days. Honest accountability without clutter.

No account required
Cairn does not require signup. Your habit data stays on your device.

PRIVACY FIRST

Cairn was designed for privacy from day one.

• No account required
• No ads
• No social feed
• No public profile
• Camera feed is not recorded
• Browsing activity is not logged
• Personal habit data stays on your device

Cairn uses on-device exercise tracking to help you interrupt urges and build better habits. It is not a medical device and does not provide medical advice. If you are dealing with severe compulsive behavior or mental health concerns, consider speaking with a qualified professional.

WHO CAIRN IS FOR

Cairn is for people who have tried willpower, blockers, streak counters, or dopamine detox routines and want something more physical.

A blocker can stop access.
A streak tracker can show progress.
Cairn adds the missing step: movement at the moment of temptation.

Quit porn. Move your body. Build the next stone.