Runtrition
Never Bonk Again
Science-backed race nutrition planning. Simulates glycogen depletion, plans fuel timing, and keeps you fueled from start to finish.
Download on theApp Store
Everything You Need on Race Day
Glycogen Simulation
Real-time carb depletion chart shows exactly when you'd hit the wall — and how your fuel plan prevents it.
Multi-Fuel Strategy
Mix gels, chews, bars, drinks, and custom fuels. The engine builds an optimal schedule from your selection.
Caffeine Timing
Strategic caffeine placement in the second half when you need the boost most.
Weather Adjustment
Hot day? Cold morning? Your plan adapts hydration and carb burn rates automatically.
Pre-Race Guide
Carb loading targets, race morning meals, and foods to avoid — personalized to your race.
Race Card Export
Export your fuel schedule as a shareable card. Tape it to your arm or send it to your crew.
Apple Watch
Fuel timer companion on your wrist with haptic alerts when it's time to eat.
Race Logging
Log what worked and what didn't after each race. Build better plans over time.
See It in Action
Free to Plan. Pro to Master.
Core planning is free. Unlock Pro for the full race day toolkit.
Runtrition Pro
- Save unlimited plans
- Custom fuel editor
- Weather & elevation adjustment
- Race logging & history
- Plan export & comparison