Drop a file, read your data
FIT, TCX, or GPX straight from your Garmin, Wahoo, COROS, or phone. No Strava export, no waiting — the analysis is instant.
Running · Cycling · Swimming · Row · Ski · Hike
The training app that
doesn't make you fight it.
Everything intervals.icu and WKO do — power-duration curves, fitness & form, time-in-zone, a planning calendar — for every endurance sport, in a UI that's actually a pleasure to use. Drop a file and see for yourself.
Analyze an activity → No account needed to try it. FIT · TCX · GPX.
- Run
- Ride
- Swim
- Row
- Ski / Nordic
- Walk / Hike
Every sport, one tool
Run, ride, swim, row, ski, hike. Each gets the right primary metric and the right load model, not a cycling tool with running bolted on.
Fitness, fatigue & form
Build a performance chart across all your sports and see your form line into race day — the model the pros use, finally readable.
Power-duration curve
Your best efforts from 5 seconds to an hour, with an estimated threshold — the WKO-style curve, no desktop install.
A calendar that plans
Drag planned workouts onto a calendar, log what you actually did, and watch the load balance itself week to week.
Beginner or pro, your call
Start with the three numbers that matter. Flip to pro for the full surface — NP, IF, VI, W′, time-in-zone — when you want it.
Where your data lives
The privacy-first calculators never touch a server. This app is different on purpose: to track fitness across months and devices it keeps your activities in your account. We store what you upload and the metrics we derive from it — nothing else, no ad trackers — and you can export or delete everything at any time. Every number links back to the published method it comes from.