Runna tells you what to do.
Pairform tells you when you're ready.
Runna ships you a personalized training plan. Pairform reads your sleep, HRV, training load, and recovery to tell you whether today's workout is actually a good idea — and what to do instead when it isn't.
You want a plan handed to you
- You're training for your first half or full marathon
- You want polished UX and step-by-step workout guidance
- You don't care to think about HRV, TSB, or recovery scores
You want training that adapts to your body
- You already wear a Garmin, Apple Watch, WHOOP, or Oura
- You've been injured by ignoring fatigue and don't want that to happen again
- You want to understand your training, not just follow it
The core difference
Plan delivery vs. data-driven coaching. They're solving different problems.
Plan delivery
Tell Runna your race date and target time. It generates a training plan and ships you the workouts, day after day. The plan is personalized at the start — but once it's running, it's mostly a static schedule.
If you didn't sleep, if your HRV crashed, if you're fighting a niggle — the plan doesn't know. It still tells you to do today's tempo run.
Data-driven coaching
Pairform pulls in everything you already track — Strava workouts, WHOOP recovery, Withings weight, sleep, HRV, resting heart rate — and computes a daily readiness score from training stress balance, sleep quality, HRV trend, recovery, and injury status.
When today's plan and your body disagree, Pairform tells you before you blow up your training block.
The injury problem with plan-only apps
A static plan doesn't see what your body is telling you.
Runners on Reddit and TikTok have been increasingly vocal about getting injured following Runna plans. The issue isn't the plans themselves — it's that no plan, however personalized at week zero, can adapt to a poor night's sleep, a crashed HRV reading, or a creeping training load that's ramping faster than your body can absorb.
Acute:Chronic Workload Ratio
Pairform monitors your 7-day vs. 28-day load ratio and flags when you're ramping into the injury risk zone (>1.5).
HRV trend monitoring
A single low HRV day is noise. A 7-day downward trend is a warning. Pairform tracks both.
80/20 intensity check
If your easy days have been too hard for two weeks, Pairform flags it before it becomes overtraining.
Side-by-side feature comparison
We've tried to be honest. Where Runna is genuinely better, we say so.
Daily readiness score (TSB + sleep + HRV + recovery)
ACWR injury risk monitoring
80/20 intensity distribution analysis
Aerobic efficiency trending (HR vs. pace decoupling)
VDOT-based race time prediction
Adapts daily based on biometric data
Personalized race plans (5K → marathon)
Polished workout step-by-step UX
Plan adjusts when you're under-recovered
Plan respects training load history
Strava sync
Apple Watch / Garmin watch integration
Pairform pulls from Garmin Connect
WHOOP recovery & strain
Oura sleep & HRV
Withings smart scale
Intervals.icu sync
Fitbit
Built-in AI coach (Claude)
Use ChatGPT with your training data
REST API access to your own data
MCP support (Claude, custom agents)
Export your data anytime
Independent (not owned by Strava)
Runna was acquired by Strava in 2025
Bundled into a separate social platform
Free dashboard with all integrations
Last updated April 2026. Runna features based on publicly available information.
Where Runna is genuinely better
We're not pretending Runna is bad. It's a polished product with real strengths, and for the right runner it's a good fit. Here's what Runna does better than Pairform today:
Watch integration depth
Runna's Apple Watch and Garmin workout pushing is more polished. Pairform is catching up, but not there yet.
Step-by-step workout UX
Runna's in-workout guidance for intervals and tempo runs is best-in-class. If you want the app to talk you through every rep, Runna wins.
Race partnerships
Runna has official partnerships with major races (London, Berlin, NYC). If branded plans matter to you, Runna has more of them.
Who Pairform is for
Pairform is built for one specific kind of runner.
The wearable runner
You already track sleep, HRV, and recovery. You're frustrated that your training app ignores all of it.
The student of running
You don't just want to be told what to do — you want to understand why. You read about LT1/LT2, you've heard of CTL/ATL, you care about VDOT.
The injury-burned runner
You've been hurt by ignoring your body before. You want a system that flags when you're heading toward overtraining — not one that pushes you into it.
The AI-native runner
You use ChatGPT or Claude. You want them to actually know your training data — not guess from your one-line summary.
The data-forward coach
You coach a handful of athletes and want one place to see their training load, readiness, and compliance — through an API your tools can read.
The independent type
You'd rather your training data not be harvested into a social platform. You want ownership and exportability.
The number Runna can't calculate
Pairform's readiness score (0–100) is computed daily from five weighted signals. Components with missing data are excluded and weights redistributed — so the score works whether you have one wearable or five.
- Training Stress Balance (TSB)30%
- Sleep quality25%
- HRV trend20%
- Recovery score15%
- Injury status10%
Try the data-driven side
Connect Strava and your wearables in two minutes. The dashboard, readiness score, and integrations are free forever.