Your palmarès
Every climb you've ever ridden, matched across rides — every attempt, your PRs, and whether you're getting faster. Name your local climbs and chase your own records.
Cycling performance · iOS & Android · Now on the App Store & Google Play
Read the crux
Read the crux
of every ride.
Built for cyclists who train, not just ride. Training load, power curves, time in zones and gear analysis — Crux turns your rides into the insight that makes you faster.
● Free while in early access · no account · no subscription
FORM +12
NP 241W
TSS 545
IF 0.85
↑ 2,972m
W/KG 3.8
01 — What you get
The whole picture, across every ride.
Training load & form
Fitness, fatigue and form from every ride — a full performance-management chart, so you know when you're fresh or digging a hole.
Power profile
Your all-time power curve plus per-ride mean-maximal power — from 1-second sprints to multi-hour efforts, with W/kg.
Your FTP, from evidence
Hold a genuinely steady 35–75 minute effort and Crux uses that as your FTP — a demonstration, not a model — with the time you held it. Otherwise a Critical Power fit decides, with the efforts, the model and its confidence all on show. Not a black box.
Durability
Your power when you're already deep into a ride: compare fresh against after 500–2,500 kJ of work, and see how much of your 5-minute power survives to hour three — with the ride behind every number.
Time in zones
Exactly where your power and heart rate sat — Coggan power zones and heart-rate zones, broken down for every ride.
Your ride library
Import your FIT files and browse your whole season on an activity grid. Works with Garmin, Wahoo, Hammerhead and other FIT-compatible devices — wherever you keep your files. Search, filter by date, and drill into any day.
Gear & climb tools
Gear ratios and gain, side-by-side bike comparison, and climb-time estimates from your power, weight and the gradient.
Tyre pressure
Front and rear PSI calculated from rider weight, tyre width, surface and tubeless setup — tuned to your bike, not a one-size chart.
03 — Available now
Available now on the App Store and Google Play.
Crux is out on the App Store and Google Play — free while in early access, with no account and no subscription. Bring your FIT files from wherever you keep them and start reading your rides.
Questions before you download? Get in touch.