UltraFuel: Ultramarathon Fuel

Fuel your race like you've got a pro crew.

Sponsored elites have nutrition dialed in and a crew feeding them every few miles. Everyone else is guessing. UltraFuel gives any ultramarathon or trail runner that same advantage: a fueling plan built from your own training, a gut trained to handle it, and a crew that knows exactly what you need on race day.

PLAN — built from your runs, not a chart UltraFuel turns your own training data into personalized ultramarathon nutrition: how many carbs per hour you can absorb, how much fluid and sodium you lose, and what to take at every aid station. It learns your carb tolerance and estimates your sweat rate from the runs you already log. No population averages, no generic race nutrition calculator. Your fueling plan gets sharper the more you run.

TRAIN — a gut that's ready before the start line Stomach problems end more ultras than legs do. UltraFuel builds gut training into your weeks of prep, gradually raising your carb tolerance so your body is ready to take on real race fuel long before race morning. Gut training as a structured program, not a one-time calculation.

EXECUTE — a crew that knows the plan An aid-station planner and offline crew tracker in one. Share your race plan and your crew knows exactly what to have ready at every stop: what, when, and how much. Drop-bag lists, per-station products, printable crew sheets. Works fully offline, even deep in the mountains with no signal.

BUILT FOR EVERY ULTRARUNNER Whether you're a solo runner self-crewing your first 50k, training your gut for your first 100-miler, or an experienced racer who wants your support crew dialed in, UltraFuel gives you the tools the pros already have. Syncs with Strava and Apple Health, so runs from Garmin, COROS and Apple Watch flow straight in.

WHY TRUST IT UltraFuel was built by an ultrarunner who watched sponsored elites get a fueling edge most of us never had. Every recommendation is grounded in published sports-nutrition research and refined with AI. It's not clinical advice, and it's not a replacement for your doctor or dietitian — it's the tool that closes the gap between elite support and everyone else.

FREE FOREVER Training-app sync, manual logging, the full gut-training program, your fueling profile, core insights, one race with a basic plan, and joining someone else's race as crew.

ULTRAFUEL RACE KIT An optional subscription that adds unlimited races, aid-station and drop-bag planning, per-station product lists, printable crew sheets, live crew tracking, and the deeper analysis layer — temperature patterns, race-day projections and training trends.

Monthly: $11.99 per month Annual: $69.99 per year, with 14 days free on your first subscription

Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the end of the current period. You can manage or cancel your subscription in your Apple Account settings after purchase.

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Download UltraFuel and stop guessing your way through race-day nutrition.