A coach that
shows its work.
Meridian reads your readiness each morning, builds the session that fits it, and explains exactly why — then sends it to your Apple Watch.
14-day free trial, then $30/year · iPhone & Apple Watch
Every number, explained.
Most apps hand you a score and ask you to trust it. Meridian opens the hood: what shaped your readiness, how much training runway you have, and why today's session is what it is.
- See the readiness, ACWR, and load figures behind each decision
- Read the actual formulas — nothing is hidden
- Tune the thresholds yourself as you learn your own body
The session that fits today.
Meridian builds each workout to a training-load budget rather than pulling it from a static template — with intervals, targets, and optional strength cross-training that support your sport instead of taxing it.
- Auto-built interval blocks sized to your available load
- Sport-specific zones for running, cycling, and swimming
- Send the session straight to your Apple Watch
Watch your fitness take shape.
Track the trend, not just the day. Meridian models your power–duration and pace–distance curves, tracks your streak, and sharpens its picture of you with every session you log.
- Fitness curves for cycling power and running pace
- VO₂max, durability, and sport-specific zone analysis
- A training calendar that keeps the whole plan in view
Eat for the session you're about to do.
Fueling guidance that scales with the day's intensity — daily energy and macro targets that account for the workout you actually logged, plus carb and sodium targets for the session ahead.
- Daily targets built from resting needs plus workout energy
- Session-specific carb and sodium guidance
- Informational tracking — never medical nutrition therapy
Built for athletes who want to understand the numbers.
Not shielded from them.
It actually coaches
Readiness fused from HRV, resting heart rate, sleep, and energy. A plan that adapts when your body says so — and tells you when to back off.
Made for endurance
Run, bike, and swim as first-class disciplines, with training load, durability, fitness curves, and fueling in the language you already use.
Private by design
Meridian runs on your device. There's no account to create, and your health data isn't collected by us or sent to a server.
Take the plan with you.
Once Meridian builds your session, send it to your Apple Watch as a guided workout — your intervals and targets are waiting for you when you start.
- One tap to hand the workout to your watch
- Structured intervals with targets, ready to run
- Completed sessions flow back into your training history
Try it for two weeks. Then decide.
Full access from day one. Cancel any time before the trial ends and you won't be charged.
Get the appRequires iPhone. Apple Watch recommended.
Subscriptions are billed through your Apple ID and managed in App Store settings.
Currently an iOS-only app.
Meridian is built for iPhone and Apple Watch, and takes full advantage of Apple Health. We may expand to other platforms in the future — but for now, iOS is where Meridian lives.