Understand your training, not just your data.
OSO breaks down every ride and run in plain English and examines it against your own physiology.
Compatible with
Speed is personal. Your fast isn't anyone else's. It's the tailwind that makes you feel unstoppable, and the climb that leaves you gasping in the last 200 meters.
When it clicks, it's hard to describe. Everything gets loud and quiet at the same time, and the next 30 seconds are the only thing that exists.
That's the reason we do this. Not the medal. The moment the effort disappears and all that's left is motion.
Everything in One View
Every ride, run and swim feeds one model, so your form reads the same whether you trained on the bike or on your feet. Fitness, fatigue and form share a single chart, with planned sessions projected forward and your HRV, resting heart rate and sleep sitting next to the training that moved them. You arrange the dashboard. The numbers you check first are the ones you actually care about.
How Hard It Really Was
Upload a session and OSO works out how hard it really was for you, and what it changed. It tells you in words, not just charts. Zoom into power, heart rate, pace and cadence with the map tracking your cursor. Intervals are detected by repetition, so a hilly ride is never mistaken for a track session, and every effort is scored in zones that match the sport: runs on your pace, rides on your power.
Modeled After You
OSO fits a critical power model to the efforts you've actually produced, and updates it as you train. Critical power and W′ for riders, critical speed for runners. It also names the system holding you back, and how big the gap is. Closing that gap is one tap from the profile, which loads a session aimed straight at it.
Simple Pricing
One simple price for the self-coached athlete, with a Coach plan on the way for the athletes you look after. Every feature included, no tiers to decode.
Athlete
billed monthly, cancel any time
- Fitness, fatigue and form from your own data, one curve across every sport
- Individualized zones and an athlete profile, never a population table
- Power and pace curves with your critical power and critical speed
- A plain-English read on every session
- Durability, decoupling and your limiter, named with the gap
- Structured workout builder, sent straight to your head unit
- Garmin, Wahoo, Hammerhead, Strava and Polar, all connected
Coach · Coming soon
3 athletes included, then $5 / month each
billed monthly, cancel any time
- Everything in the Athlete plan, for your own training
- A shared view of every athlete you coach
- Their individualized profile, fitness and form, and session reads
- Prescribe structured workouts and send them to their device
- A roster board that shows who needs you first, at a glance
- The athletes you coach train free, covered by your plan
- Your first 3 athletes are included, then $5 each per month
- Add or remove athletes any time, pay only for active ones
The Athlete plan starts with a 10-day free trial, then bills monthly and cancels any time. The Coach plan is coming soon: a monthly base that includes 3 athletes, then a small per-athlete fee beyond that, with the athletes you coach covered by your plan and never paying separately.
Coming soon
Built for Coaches, Too
One shared view of the work: the same individualized profile, fitness and form your athlete sees, with structured workouts you send straight to their head unit. We’re building the coach and athlete relationship deliberately, with the coaches who will use it.
Become Obsessed with the Work, Not the Result.
Race day just puts your training on display.
The work is what changes you.
The 5 a.m. alarm. The interval set on an empty track in the rain. The days you show up for no reason other than you said you would. Nobody's watching, and there's no medal for any of it.
That's where you actually grow, long before you line up.
OSO exists so none of that work goes to waste. It turns the gains you can't see into something you can read and act on.
The work is who you are. Do the work.