Decide while your head is clear.
Build around the run, the conditions, and the products you trust. The strategy is settled before the start.
Marathon fueling app for iPhone + Apple Watch
Fuelstate turns your run, conditions, and trusted products into a strategy you can prepare, pack, and follow when the miles get hard.
One strategy. Ready before the start and simple to follow under pressure.
Fuelstate is a running nutrition planner and live fueling companion for iPhone and Apple Watch. It turns your profile, planned distance and pace, weather, terrain, gut tolerance, and the products already in your kit into carbohydrate, fluid, and sodium targets; caffeine guidance where relevant; and a practical packing and timing plan. During the run, that prepared plan stays close through live countdowns, audio, haptics, the Lock Screen, and Apple Watch where supported. See how the full workflow connects.
The race-day blind spot
Pace has a plan. Training has a plan. Fueling is often still a note, a screenshot, or a rough interval. At mile 20, memory is not a system.
One thought before the run. One action during it.
Build around the run, the conditions, and the products you trust. The strategy is settled before the start.
Know what comes with you and what happens before the gun—without rebuilding the plan in Notes.
Fuelstate carries the next action into the run on iPhone and Apple Watch, so your attention stays on the race.
Build around the run, the conditions, and the products you trust. The strategy is settled before the start.
Know what comes with you and what happens before the gun—without rebuilding the plan in Notes.
Fuelstate carries the next action into the run on iPhone and Apple Watch, so your attention stays on the race.
The missing execution layer
Most running tools solve one part of the day. Fuelstate connects the nutrition decisions before the start to the moment you need them.
Swipe to compare →
Planning and execution, connected.
Education and starting ranges.
A manual planning surface.
Pacing, workouts, and activity recording.
| Approach | Primary job | What shapes it | Product-specific packing | During the run |
|---|---|---|---|---|
| FuelstatePlan → pack → prompt | Running nutrition planning and execution | Runner, run, conditions, supported course context, and preferred products | Built into the strategy | iPhone and Apple Watch |
| Generic fueling guidance | Education and starting ranges | Broad guidelines | Not typically | No execution layer |
| Notes or spreadsheets | Manual planning | Whatever the runner enters and calculates | Manual | Must be remembered or referenced |
| GPS watches and training apps | Pacing, workouts, and activity recording | Training and activity data | Not typically their focus | General alerts vary |
Fuelstate complements your coach, sports dietitian, training plan, and GPS watch. It focuses on making the fueling strategy executable.
Verified App Store review excerpts
“Took the guesswork out of it and allowed me to focus fully on performing on race day.”
“This is going to help so many runners feel more prepared for runs.”
Lock Screen Live Activity
See what to take and when without reopening the plan. Fuelstate keeps the current cue, countdown, and response controls glanceable when attention is scarce.
Before you download
Fuelstate is a running nutrition planner and live fueling companion for iPhone and Apple Watch. It turns the runner, run, conditions, course context, and preferred products into a strategy to prepare, pack, and follow.
No. Fuelstate works on iPhone. Apple Watch adds wrist-based prompts and controls if you want them.
Yes. Fuelstate can build around products in its catalog and custom products you add, so the strategy reflects what you already trust and carry.
No. Fuelstate complements coaching and professional nutrition care by helping make a run fueling strategy practical and executable. It is not medical advice.
Yes. You can build a personalized strategy for any run. Supported race presets add course context where it is available.
Fuelstate builds the strategy from the runner, planned distance and pace, conditions, gut tolerance, relevant preferences, and the products selected for the run. It turns those inputs into practical targets, quantities, and timing.
Fuelstate translates nutrition targets into product-specific packing guidance. You can see what to take before the start, what to carry during the run, and the quantities needed for the planned strategy.
Fuelstate carries the planned fuel timing into the run through iPhone and Apple Watch surfaces, including live countdowns, prompts, audio, haptics, and glanceable run information where available.
No. Fuelstate can build fueling strategies for training runs, half marathons, marathons, trail runs, and ultras. The inputs and selected products shape the strategy for the specific run.
Yes. Fuelstate can record completed or skipped fuel events and support a post-run review of execution, fueling quality, gut feedback, and product patterns over time.