Target structures
Build stone forms with a tactile puzzle loop that gives your impulse time to pass.
private app blocker for iPhone
Stack before you scroll.
Cairn interrupts the reflex to open distracting apps. Choose what to protect, solve a small stone ritual, and earn a short window before the shield returns.
No account
No cloud
On-device trail
Built with Screen Time frameworks
the ritual
A blocker that slows the moment, not your whole phone.
Cairn uses friction differently. Instead of another dashboard to ignore, it creates a deliberate pause right when the habit starts.
1
Pick distracting apps. Cairn protects the apps you choose using Apple's Screen Time APIs.
2
Reach for one. iOS shows a shield and sends you back to Cairn first.
3
Build the cairn. Stack, trace, breathe, walk, or untie a small puzzle.
4
Earn a short window. Protected apps open for a few minutes, then Cairn blocks them again.
features
Designed around the exact moment you almost give in.
Short unlock windows
Use the app intentionally, then let Cairn reapply protection when the timer ends.
Stone styles
Unlock visual styles like basalt, riverstone, obsidian, marble, moss, and moonstone.
Journal insights
See reclaimed minutes, streaks, and saved reflections without creating an account.
Guard Mode
Add a 24-hour pause before changing protected apps or resetting the trail.
Private by default
No analytics, no ads, no cloud account, and no server-side blocked-app list.
screens
The app feels quiet because the moment is loud enough.
privacy
No account. No cloud. No ad tracking.
Cairn is built around local device data. Your chosen app tokens, stats, settings, and reflections stay on your iPhone unless Apple handles a system service such as App Store purchases.
launch
Cairn is preparing for the App Store.
For support, privacy questions, legal requests, or launch updates, email cairnfocus@proton.me.