ChallengeUS: Run & Tri Coach

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About this app

Big goals. Whatever it takes.

ChallengeUS is the group for people who set themselves big goals and go all out to reach them: a running or triathlon race, fitted around work and family. The coach builds your plan from your race calendar, finds a way to get there every week and tells you how close you are to your goal. Every change is a suggestion: you decide.

A PLAN BUILT AROUND YOUR RACES
• Goal race and tune-up races, the time you have each day, your typical week
• Phases, recovery weeks, taper and tests in the right place; never two hard days in a row
• Week, month and the journey to race day, with planned hours and kilometers
• A half or a marathon can become that week's long run

THE COACH SUGGESTS, YOU DECIDE
• Every evening the coach reviews your day, every Sunday your week
• After a bad night it suggests a lighter session
• Ask it to move a session by writing, dictating or sending a photo: you see the resulting week and approve with one tap
• The coach uses artificial intelligence only with your permission

CONNECTED TO YOUR GARMIN
• Activities with pace, heart rate, power, laps and route sync automatically
• Plus sleep, HRV, resting heart rate and Training Readiness
• Your next 7 days of sessions go to your watch automatically, with your paces and zones

EVERY MORNING YOU KNOW WHERE YOU STAND
• Today's session first, with the coach's advice
• Your state today, from sleep, HRV, recovery and load
• Preparation and goal, shown separately: where your preparation stands and, for running, how realistic your goal time is
• Every activity read the way a coach would read it: intervals, zones, comparison with recent weeks, place and weather
• Nutrition: carbs and protein day by day

YOU DON'T TRAIN ALONE
• In Groups there's the ChallengeUS community, and every race has its own group to prepare for it together
• Others only see the name you choose, never your email

The first 200 athletes to reach at least 4 active weeks by March 31, 2027 become pioneers: ChallengeUS free for life, AI coach included. Terms apply.

Report a problem or suggest an idea right in the app: we reply there.

Your challenge. Never alone.

ChallengeUS is not a medical device and does not give medical advice. Consult your doctor before starting a training program and before any decision about your health.

Garmin and Garmin Connect are trademarks of Garmin Ltd. or its subsidiaries. ChallengeUS is not affiliated with Garmin.
Your plan for a running or triathlon race. The coach suggests, you decide.
Updated on
Nov 4, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Location, Personal info and 6 others
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

A simpler app in five tabs: Today, Plan, Coach, Groups and You. Swims in meters with a 25 or 50 m pool, indoor or outdoor rides, sessions that vary from week to week. You can upload a .FIT file from an app that does not reach Garmin.
Content rating
Everyone
Users Interact
Learn more

App support

About the developer
Shatoot GmbH
info@challengeus.com
Bühlstrasse 31 6314 Unterägeri Switzerland
+41 76 261 15 90