Cairn: Gentle Habit Tracker
Stack a stone, mark the trail
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
A calm, forgiving habit tracker. Stack a stone for each thing you do, watch today's cairn grow, and let every stone carry you higher up a real mountain.
Cairn is a calm habit tracker built on one image: the small stone towers that mark mountain trails.
Every habit is a trail you are walking. Every time you do the thing, you stack a stone, and today's cairn grows. Count habits, like drink water eight times or do three sets, grow the cairn stone by stone. Your history becomes a trail of small cairns receding into the distance.
Missed a day? It is just flat ground. There is no guilt grid and no broken chain to punish you. The trail simply continues.
WHAT YOU CAN TRACK
- Once-a-day trails that take a single stone.
- Counted trails that grow stone by stone toward a daily target.
- Keep-clear trails for something you want to stop: log only a slip, never a failure, and keep walking.
THE CLIMB
Every stone you stack lifts you ten metres up a real mountain. Summits are climbed in order, from Floyen to Everest, and each one you reach earns a dated passport stamp. It is a quiet long game that turns everyday consistency into a genuine expedition.
COMPANIONS
Share your six-letter trail code with a friend and become companions on the trail. See each other's cairns rise through the day and toss a pebble when someone could use a nudge. Companions are entirely optional. Cairn works fully offline, and no habit names, schedules, or history ever leave your device.
WIDGETS
Keep today's cairn on your home screen. Stack a stone straight from the widget without opening the app, or pin a single trail to a large one-tap counter.
DESIGNED TO BE CALM
- A warm, quiet interface with light and dark themes.
- Gentle haptics and small celebrations when a trail crosses a milestone.
- Local reminders, set per trail, with no accounts required to begin.
- A shareable JSON backup you can export and restore at any time.
Cairn is about steady, forgiving progress. Stack a stone, mark the trail, and let the days add up.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, LUKAS ANDREAS NILSEN, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nilsen Lab
- Size
- 40.1 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Messaging and Chat
User-Generated Content
- Copyright
- © 2026 Lukas Nilsen