Comparison
KYN vs Runna: Which AI Running Coach Should You Pick?
An honest, balanced comparison of KYN and Runna — training philosophy, adaptation, device support and price.
Updated June 28, 2026
Short answer
Runna is pace-led and beginner-friendly. KYN is physiology-led and adapts weekly to your body's signals.
Best for KYN
Runners who want training that responds to heart rate, RPE and recovery — not just pace targets.
Best for Runna
Beginners chasing a specific 5K, 10K or marathon time who want the smoothest possible onboarding.
Feature comparison
| Feature | KYN | Runna |
|---|---|---|
| Training prescription | Heart rate zones + RPE | Pace-first, with HR optional |
| Weekly adaptation | Adapts to RPE, HR drift, completed vs planned load, and any sessions you add | Reshuffles around missed sessions, less weight on physiological feedback |
| Time-based training | Yes — every session prescribed in time | Distance and pace primary |
| AI coach chat | Yes — grounded in your context | Limited |
| Garmin / Apple Watch / Coros | Garmin, Apple, Coros, Wahoo (rolling out) | Garmin, Apple, Coros |
| Strava sync | Yes | Yes |
| Free tier | Yes — current week always free | Trial only |
| Pro pricing | £5/mo or £39/yr | ~£15.99/mo or ~£119.99/yr |
KYN's philosophy
Train the body, not the pace. Heart-rate zones and RPE are the master metrics. Pace exists as a guide derived from your races.
Runna's philosophy
Hit the prescribed pace. Plans are built around goal race times and structured pace blocks.
Verdict
If your training environment is consistent and you love hitting specific paces, Runna is a polished pick. If you train through real life — varied weather, sleep, stress, hills — KYN's physiological approach will protect your easy days and make your hard days count.
KYN
Try KYN free
Build an adaptive training plan in under three minutes. Free tier, no card required.
Build your planFAQ
Is KYN cheaper than Runna?
Yes. KYN's Pro tier is £5/month versus Runna's roughly £15.99/month, and KYN's free tier lets you see and use the current week of your plan indefinitely.
Does KYN work on Apple Watch?
Yes — KYN integrates with Apple Health and pushes structured workouts to Apple Watch alongside Garmin and Coros.
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