Cairn｜A Garmin Hiking Data Field Built for the Climb
Cairn is a full-screen hiking data field built for climbing, not the flat. The free edition shows six metrics; the paid Cairn Pro expands to twelve, all on one screen.
Short version: the free edition alone gives you six climb-focused metrics — altitude, ascent, grade — and Cairn Pro adds six more when you want them.
Cairn / Cairn Pro
One screen, only the numbers that matter on a climb — nothing to scroll for. Every cell drawn the same way — small label, big value — so you read it at a glance.
⌚ See Cairn (free) on the store ⌚ See Cairn Pro on the storeWho is this for?
- Hikers, mountaineers and trail runners who want altitude and grade at a glance
- Anyone who wants one screen instead of scrolling through activity fields
- Anyone who wants numbers that matter for planning a climb — distance to an ascent goal, time until sunset
- Anyone who'd rather try free first and upgrade only if they need to
Free Cairn vs. Cairn Pro
| Cairn (free) | Cairn Pro | |
|---|---|---|
| Metrics | 6 | 12 |
| Fields | ELEV, ASCENT, GRADE, DIST, TIME, HR | Above 6, plus VAM, DESCENT, TO GO, DAYLIGHT, TEMP, BATTERY |
| Ascent goal | Not included | Countdown to a goal you set |
| Daylight left | Not included | Calculated on-watch from GPS, no phone needed |
| Narrow screens | — | Auto-drops to a 6-cell "Focus" layout |
| Price | Free forever | 5-activity free trial, then one-time US$2.49 |
| Network | None, no permissions | KiezelPay server only (unlock check) |
Compatible watches
69 Garmin watches: Forerunner 70 / 165 / 165 Music / 170 / 170 Music / 255 / 255 Music / 265 / 265S / 570 (42 / 47 mm) / 955 / 965 / 970, Venu 2 / 2 Plus / 2S / 3 / 3S / 4 (41 / 45 mm), vívoactive 5 / 6, fēnix 6 / 6S / 6 Pro / 6S Pro / 6X Pro, fēnix 7 / 7S / 7X / 7 Pro / 7S Pro / 7X Pro (including the no-Wi-Fi models), fēnix 8 AMOLED (43 / 47 mm) / fēnix 8 Solar (47 / 51 mm) / fēnix 8 Pro (47 / 51 mm) / fēnix E / fēnix 9 (43 / 47 mm) / fēnix 9 Pro (43 / 47 / 51 mm) / fēnix 9 Pro Solar (47 / 51 mm), epix (Gen 2) / epix Pro (Gen 2) (42 / 47 / 51 mm), enduro / enduro 3, Instinct 3 AMOLED (45 / 50 mm), MARQ (Gen 2), Approach S50 / S70 (42 / 47 mm), Descent G2 / Mk3 (43 / 51 mm), D2 Air X10 / Mach 1 / Mach 2 / Mach 2 Pro (including tactix, quatix and other models on the same platforms)
* Cairn Pro supports 63 of these watches: fēnix 6 / 6S / 6 Pro / 6S Pro / 6X Pro and enduro are not supported, because they can't connect to the payment service from a data field. Please use the free Cairn on those watches.
Price and how to buy
The free Cairn needs nothing beyond installing it — all six metrics are free forever, with no network access and no permissions requested.
Cairn Pro is listed free but is the paid edition. The first 5 activities you use it in are a free trial with every feature working. After that the field shows a 6-digit code and the URL www.kzl.io/code until you unlock it. A one-time payment of US$2.49 (no subscription) unlocks all twelve metrics for good. Open www.kzl.io/code on your phone, enter the code and pay, and it unlocks within a few minutes. Payment is processed by KiezelPay (card or PayPal), not Garmin. Other watches on the same Garmin account don't need a second purchase.
FAQ
Q. Is Cairn free to use?
A. Yes. The free Cairn is a six-metric hiking data field and is completely free, with no network access and no permissions requested.
Q. What does Cairn Pro add?
A. Cairn Pro expands to twelve metrics, adding climb rate (VAM), total descent, distance to an ascent goal you set, time until sunset, temperature and watch battery. The first 5 activities are a free trial; after that a one-time US$2.49 payment unlocks it for good.
Q. Where does Cairn Pro's payment go?
A. Payment is processed by the third-party service KiezelPay, not Garmin directly. Once the trial runs out, the field shows a 6-digit code and a URL — open it on your phone, enter the code and pay (credit card or PayPal).
Q. Which watches are supported?
A. Forerunner 165 / 255 / 265 / 570 / 955 / 965 / 970, Venu 2 / 3 / 4, vívoactive 5 / 6, fēnix 6 / 7 / 8 / 8 Pro / E / 9, epix (Gen 2) and epix Pro, enduro, Instinct 3 AMOLED, MARQ (Gen 2), Approach S50 / S70, Descent G2 / Mk3 and D2 — 69 devices in total (Cairn Pro: 63, without the fēnix 6 series and enduro). See the Compatible watches section for the full list.
Q. What's the difference between a data field and a watch face?
A. A data field is a screen you add during an activity recording, such as a run or hike. Cairn and Cairn Pro are data fields, so unlike an always-on watch face such as Aurum, they only appear while an activity is being recorded.
Your climb data, on one screen
Install the free Cairn now — it stays free forever. Want more? Try Cairn Pro free for 5 activities.
⌚ See Cairn (free) on the store ⌚ See Cairn Pro on the store