For runners, cyclists & triathletes

Real-time nutrition tracking on your wrist

Log carbs, sodium, and water during training and race day. Instant sync between iPhone and Apple Watch — works offline, no internet required.

Built for race day

Every feature designed for when you're tired, moving, and need quick answers.

GPS Route Visualization New

See where you fueled with interactive maps, elevation profiles, and heart rate zones. Import Garmin FIT files.

Instant Sync

Changes sync between iPhone and Apple Watch in under 1 second via Bluetooth. No internet required.

Apple Watch

Log food from your wrist during any activity. One tap, instant timestamp, back to moving.

Live Activities

Session stats on your Lock Screen and Dynamic Island. Glance at nutrition without unlocking.

Hourly Breakdown

Consumption stats for each hour with actual rates and averages. Spot patterns in your fueling.

Works Offline

Bluetooth sync between devices, CloudKit backup when online. Built for 24+ hour ultra events.

Built by an ultrarunner

FuelFlow was created after bonking at mile 70 of a 100-miler — trying to track nutrition in your head doesn't work when you're exhausted. Every feature reflects real lessons from the trail, from quick-tap logging to real-time hourly tracking.

Whether you're running an ultra, cycling a century, or racing a triathlon, proper fueling makes or breaks your performance. FuelFlow helps you nail your nutrition so you can focus on moving forward.

Start tracking your nutrition

Join endurance athletes who fuel smarter with FuelFlow.