Theron: Dynamic Triathlon Plan. Built for Apple Watch.

Stop guessing your next workout. Theron is the only adaptive scheduler that uses your Apple Health data and your inputs to automatically create the perfect training plan, ensuring you hit race day at peak fitness.

START FREE: Get Theron on the App Store

First 60 Days Absolutely Free | No Credit Card Needed

Theron app on iPhone and Apple Watch

Stop Using Static Plans That Don't Adapt to You

Theron: The Smarter, Simpler Way to Train

Adaptive Training, Minute by Minute
Theron uses your Apple Health data, including Sleep, HRV, and Daily Activity, to dynamically adjust the intensity and duration of your next workout in real-time.

Built for the Apple Ecosystem: Seamless Integration

Apple Watch

Workout Guidance on Your Wrist
Export your entire training session—from long rides to interval runs—directly to your Apple Watch with one tap. Follow real-time zones and instruction without interruption.

Apple Health Data

Scientific Coaching Powered by Health Metrics
Our algorithm is built on peer-reviewed sports science. We translate your Health metrics (like resting heart rate and sleep quality) into actionable training decisions, ensuring you train hard only when your body is ready.

Workout Support

All Distances, All Workouts
Whether you're training for your first Sprint or aiming for an Ironman PB, Theron provides perfectly periodized plans. Includes specific workouts for swim, bike, and run training.

Simple, Transparent Pricing

🚀 Try Theron FREE for 60 Days!

Theron Pro Membership

  • Full access to Dynamic Training Plans
  • Seamless Apple Watch & Health Sync
  • Unlimited Race Planning
  • Priority Support
€8.50/month
Download Free on the App Store

Need Help? Contact Theron Support

Or email us directly at: hello@theron.app