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Keep your trusty planand bring it to life.

Bring the plan you already have. Cairn watches your training and suggests changes, never behind your back.

Slept under usual. Cairn trimmed Wednesday and left Thursday alone. Why?

…still just paper…

Trusty plan

DaySessionDose
TueThreshold12 km
WedEasy run10 km
ThuThreshold3 × 2 km

Alive plan

ALIVE
DaySessionDose
TueThreshold12 km
WedEasy run10 km7 kmPROPOSED
ThuThreshold3 × 2 km
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Thursday stays because it’s the point of your week.

Wherever your plan is from, Cairn copies it exactly as written. You mark the sessions that matter most. Those stay protected, and only the easier ones can flex.

AS WRITTEN

copied exactly. never edited.

  • Tue · Threshold · 12 km
  • Wed · Easy · 10 km
  • Thu · Threshold · 3 × 2 kmKEY
So how does it know when to step in?
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Then you run.

Cairn reads each run against your plan, and your sleep from your watch or your morning check-in. What it can’t see, it says it can’t see.

THIS WEEK

  • MonEasy run
    8 km8.1 km
  • TueThreshold
    12 km12.0 km · 1:04:10
  • WedEasy run
    10 kmnot yet
  • ThuThresholdKEY
    3 × 2 kmnot yet

Sleep

  • Mon7h 05
  • Tue

    Can't see Tuesday's sleep.

  • Wed—
  • Thu—
So what does it actually do about it?
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Every change comes with its receipts.

It’s only ever a suggestion, with the runs and numbers behind it so you can check them against your own watch.

Wed · Easy run · 10 km 7 km

PROPOSED

Wed needs a look.

slept 1 h 20 m under usual

Slept under usual [1]. Overnight recovery is below baseline [2]. Tuesday’s threshold already posted [3]. Cairn trimmed Wednesday and left Thursday alone.

Thu · Threshold · 3 × 2 kmHELD

What if I miss a day?
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A missed run isn’t a lost week.

Cairn offers a way to move what you missed. Your key workouts stay protected, and nothing changes until you say so.

Wed

Easy · 7 kmmissed

move to Fri

Fri

Run · 6 km

NOT YET CLASSIFIED

Fri: easy or progression?

Who decides, then?
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Your call, always.

EXAMPLE · NOT YOUR DATA

Wed · Easy run · 10 km 7 km

PROPOSED

Silence does nothing.

Export your plan and every change, any time.

Okay. How do I start?
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Cairn doesn’t write plans. It keeps yours alive.

For runners who already have a plan they trust. Bring it, and tell us what’s next.

We'll only use your email to tell you when private beta opens. (Consent copy pending legal review.) Privacy

GOAL · Lakeshore Marathon · 34 days

Running first. · Not medical advice.

NOTES

Does it change my plan?

Your original stays as written. A change is a suggestion you accept, edit or keep.

What about my key workouts?

Protected. Key workouts are never changed without you. When one looks costly, Cairn suggests options and asks.

Which watch?

At launch, a Garmin FIT file upload. Others later.

Is this a coach?

No. It does not write plans and is not medical advice.

What if I skip logging sleep?

It still works and tells you what is missing.

Can I leave with my data?

You will be able to export your plan and every change.