FuelCast: Endurance Fuel Plan

Carbs, Caffeine & Hydration

Only for iPhone

$4.99 · Designed for iPhone. Not verified for macOS.

iPhone

FuelCast builds a carbohydrate, caffeine, and hydration plan around your run or ride. Tell it how far you're going, how fast, and what fuel you're planning to use. In seconds, you have a timed plan - what to take, when, and how much. Science-backed carb targets FuelCast recommends carbohydrate intake based on your race duration, following evidence-based sports nutrition guidelines. Targets adjust automatically as your estimated finish time changes. Variable-interval timing Unlike fixed-interval calculators, FuelCast spaces your fuel based on the actual carb content of each item. A 40g gel needs more time before your next fuel point than a 22g one. The maths adjusts to what you're actually carrying. Mix gels and real food freely Choose from a pre-loaded database including Maurten, SiS, GU, Precision Fuel, High5, Lucozade, Torq, NeverSecond, and others, alongside real food options including bananas, Medjool dates, rice cakes, and jelly babies. Add your own items with a name and carb count. Race course nutrition For supported events, on-course nutrition stations are merged into your personal plan. You see what's available on course and how it fits around what you're carrying. Supported running courses: TCS London Marathon, BMW Berlin Marathon, Bank of America Chicago Marathon, TCS New York City Marathon, Boston Marathon, Tokyo Marathon. Supported cycling courses: L'Étape du Tour de France, La Marmotte Granfondo Alpes, Maratona dles Dolomites. Caffeine strategy Caffeinated gels are automatically placed in the final 40% of your race, where they deliver peak benefit when it matters most. Caffeine total is shown in mg and mg/kg bodyweight. Hydration plan Estimate your sweat rate from temperature and effort, or enter it directly. FuelCast calculates a fluid target and tells you when to drink water versus sports drink - and adds sports drink carbs to your plan total. Cycling support FuelCast supports both running and cycling, with sport-specific carb recommendations and separate sweat rate estimates that account for airflow cooling on the bike. One-time purchase, no subscription. Buy FuelCast once and use it for every race. No account, no login, no subscription. Your data stays on your device and is never shared. Please fuel responsibly.

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The developer, Mountain Fold Architecture, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Contact Info
    • User Content

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

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Information

Seller
Mountain Fold Architecture Limited
Size
31.5 MB
Category
Health & Fitness
Compatibility
Requires iOS 15.1 or later.
  • iPhone
    Requires iOS 15.1 or later.
  • iPod touch
    Requires iOS 15.1 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
9+
Copyright
© 2026 Mountain Fold Architecture Ltd
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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