Marathon fueling app for iPhone + Apple Watch

Don’t leave fueling to memory.

Fuelstate turns your run, conditions, and trusted products into a strategy you can prepare, pack, and follow when the miles get hard.

Fuelstate run strategy showing targets, selected products, packing guidance, and fuel cadence on iPhone.

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

Your training is precise. Why is your fueling still a guess?

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.

Decide clearly. Pack once. Follow through.

Fuelstate strategy showing run targets, selected products, packing guidance, and fuel cadence.
01 · Plan

Decide while your head is clear.

Build around the run, the conditions, and the products you trust. The strategy is settled before the start.

02 · Pack

Pack certainty, not extras.

Know what comes with you and what happens before the gun—without rebuilding the plan in Notes.

03 · Follow

When thinking gets expensive, the plan gets simpler.

Fuelstate carries the next action into the run on iPhone and Apple Watch, so your attention stays on the race.

Fuelstate strategy with run targets, selected products, packing guidance, and fuel cadence
01 · Plan

Decide while your head is clear.

Build around the run, the conditions, and the products you trust. The strategy is settled before the start.

Fuelstate what-to-bring view with product-specific quantities and timing
02 · Pack

Pack certainty, not extras.

Know what comes with you and what happens before the gun—without rebuilding the plan in Notes.

Fuelstate hands-free fueling cues during a run
03 · Follow

When thinking gets expensive, the plan gets simpler.

Fuelstate carries the next action into the run on iPhone and Apple Watch, so your attention stays on the race.

The missing execution layer

Your tools track the race. Fuelstate carries the fueling plan.

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

01 / 04

Fuelstate

Planning and execution, connected.

Shaped by
Runner, run, conditions, course context, and preferred products
Packing
Built into the strategy
During the run
iPhone and Apple Watch
02 / 04

Generic fueling guidance

Education and starting ranges.

Shaped by
Broad guidelines
Packing
Not typically included
During the run
No execution layer
03 / 04

Notes or spreadsheets

A manual planning surface.

Shaped by
Whatever the runner enters and calculates
Packing
Manual
During the run
Must be remembered or referenced
04 / 04

GPS watches and training apps

Pacing, workouts, and activity recording.

Shaped by
Training and activity data
Packing
Not typically their focus
During the run
General alerts vary
Fuelstate compared with common ways runners plan and execute race nutrition
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

What changes when the plan is out of your head.

Read reviews on the App Store

“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

The next cue is already waiting.

See what to take and when without reopening the plan. Fuelstate keeps the current cue, countdown, and response controls glanceable when attention is scarce.

Live countdown Skip or complete Phone stays locked
Fuelstate Live Activity showing a fuel-now countdown on the iPhone Lock Screen during a run

Before you download

The questions that matter.

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.

You already did the hard part

Don’t leave fueling to race-day memory.

Build the plan. Pack the kit. Carry it into the run.

Download on the App Store