Cairn: The Trail Safety App 4+

Alerts, maps & cell coverage

FitClimb LLC

Designed for iPhone

    • 4.7 • 510 Ratings
    • Free
    • Offers In-App Purchases

iPhone Screenshots


Cairn helps you stay safe on your hikes, runs and outdoor adventures. Easily share your plans with loved ones, find spots with cell coverage, download offline topo maps, see stats on your route, and record your hiking trail.

Named one of the three best map apps for navigating the wilderness by Outside Magazine.

• Notifications: Safety contacts are notified when you’re past due
• Live tracking: Contacts can see your GPS location during your trip or hike
• Rescue advice: Contacts get important info needed to make intelligent rescue initiation decisions

• Know where others have found cell coverage
• Download maps that are designed specifically for outdoor pursuits
• Send status updates with a single tap

• Get live distance, elevation gain and ETA stats for 4000+ hiking routes, summits, and trails worldwide
• Customize your ETA stat based on your activity type (hiking, running, skiing, horseback riding, snow travel, mountain biking) and speed
• Record and save your trail while you hike

+ Easy: It only takes a minute to set up a Cairn
+ Open: Share plans with anyone – no app required to view
+ Customizable: Control how often Cairn collects your GPS location and battery usage
+ Flexible: Great for hiking, backpacking, trail running, horseback riding, skiing, cycling, rock climbing, camping, hunting, fishing, boating and more

While the maps, trails and cell coverage information are always free to access, you will also have the opportunity to start a free trial. This allows you to try every one of Cairn's features for 7 days.

We are committed to bringing you the best app for adventuring in the wilderness. By subscribing to Cairn Premium you are helping to support and shape our continued efforts in this direction. Subscribers also get access to all the features that help keep you safer in the outdoors.

• Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period. Your iTunes account will be charged for renewal within 24-hours prior to the end of the current period, and will identify the renewal cost.
• Payment will be charged to your iTunes Account at confirmation of purchase.
• Visit the following URL for full terms of use:
• Turn off auto-renewal via the Settings app on your device:

Need support? Email us at

What’s New

Version 2.4.5

We've improved the trail elevation profile and fixed a few bugs.

Ratings and Reviews

4.7 out of 5
510 Ratings

510 Ratings

Lisa G608 ,

Amazing App

I came across Cairn a few months ago as I was preparing for a big 17 mile hike. Cairn popped up in my research of “best hiking apps” and wow I was not disappointed. This app was perfect for letting my family know I was ok during my all day hike without me having to pull out my phone and check in every few hours. I have since used Cairn on every hike I go on and have never had anything but positive experiences. My trail progress is recorded and my family can have peace of mind knowing that I am safe because they can see my location. I’m telling all my hiking friends that they need to download this!! Also, this is the only app I am willing to subscribe to, and I can be cheap so that’s saying something :)

SeattleSoccer ,

Awesome map/GPS app for hikers

This is a great app for hikers and backpackers. It’s easy to use. You can download maps so you can use them even when you are off-line. It uses the GPS chip in your phone so you can determine your location on the map. It helps you find places with cell phone signal if you need it. And it gives you an easy way to notify a circle of friends of where you are going and when you expect to be back. It notifies them if you are overdue, and you can check in to let them know that you returned safely. I use this on all my solo hikes.

frohkid ,

This app is freaking fantastic

We have been using this app in Puerto Rico to help map all the science studies we have been doing in the rainforests above caguas after the hurricane. We have no cell service at all and little to no power. The ability to download detailed topography for free anywhere you might be traveling or working is amazing.
I have also had a contact with the cairns team. I was having trouble signing in with my new phone. They were amazingly helpful, and prompt in their response. This app should should not be free. It is too good to be true.
Keep it up y’all!

App Privacy

The developer, FitClimb LLC, 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:

  • Location
  • Contact Info
  • Contacts
  • Identifiers

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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