Connect Garmin or Strava
Activities, sleep, heart rate and recovery flow in on their own. No files, no imports: the coach always has the full picture.
RUNNING · TRIATHLON · GARMIN · STRAVA
A coach that reads everything.
A plan that changes with you, every day.
ChallengeUS is the all-in-one app for people who train between work and family: an AI coach that analyses a huge amount of data (activities, sleep, HRV, stress, calendar), builds your plan from your races with advanced models, integrates nutrition and adapts it automatically, day by day, to your sporting and working life.
- Connected to Garmin and Strava
- Plan and nutrition together
- Adapts every day, on its own
Garmin●
Z2 · 128–142
Plan adapted today, 6:12
GET THE APP
On your phone in thirty seconds.
ChallengeUS installs straight from the browser, no store needed: home-screen icon, full screen, works offline too.
- 01
Open app.challengeus.com on your phone
On a computer, scan the QR code next to this: the app opens on your phone.
- 02
Tap “Install”
On Android it shows up right away; on iPhone tap Share, then “Add to Home Screen”.
- 03
Sign in the way you like
With Strava, Google, Apple or with e-mail and password. Your plan starts in two minutes.
- Strava
- Apple
- E-mail and password
HOW IT WORKS
Three steps, then the coach takes over.
Tell it your races, time and life
Main race, tune-up races, minutes available per day, work peaks. The season plan comes from advanced models: base, build, specific, taper.
Live, the plan adapts
Short sleep, a trip, a heavy week at the office? Every day the coach re-reads everything and redraws the week, with an explanation. Each session goes to your watch.
INSIDE THE APP
Everything in one app. Nothing to stitch together.
A coach that analyses everything
Thousands of data points a day: activities, sleep, HRV, stress, load and calendar. The AI coach reads them together and tells you what to do today, and why.
Plan from your races, with advanced models
Phases, recovery, taper and tests in the right place; load and form estimated with physiological models, never more than 10 % progression.
Adapts every day, automatically
Work, travel, family, a missed session: the week redraws itself and stays consistent with the goal.
Nutrition built in
Carbs and protein per day, fuelling in long sessions, carb-loading and race-day plan: all in the same plan.
Are you on track?
One indicator weighing trajectory, adherence, recovery, safety, time and life period. You always know where you stand versus the race.
It talks, you decide
Dictate how you feel: the coach understands, proposes, you confirm. The plan always respects the safety limits.
WHEN YOU WANT A PERSON
The AI works every day. A real coach, when you ask.
The plan is the AI's, explained and verifiable. When you want extra assurance (an important block, a race that matters) a certified coach reviews the proposal, corrects it and signs it. Or you book a session with them.
Plan confirmation
The coach reviews the week or block proposed by the AI and approves or edits it, with notes for you.
Coaching session
1:1 video call for tests, technique, race strategy or to talk about how it is going.
Ongoing follow-up
A coach follows you for the block or the season: the AI works, they decide.
MERCHANDISE
Wear it.
Tri suits, cycling kits, running and swim tops in ChallengeUS green. Coming with the beta.
TriMax
Men's and women's tri suit
CycloneGear
Cycling kit
RunPro
Running top
PRIVATE BETA
Be among the first.
We are opening the beta to a small group of athletes with a Garmin watch. Leave your email: we'll write to you.
We use your email for the beta only. No newsletter without your consent.