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DataFuel

The smart supplement box for endurance athletes.

DataFuel is a monthly supplement box based on your training data. We close the loop between wearables and supplementation.

The DataFuel supplement box: matte black carton with an orange gradient, DATA on the short side and FUEL on the front
The DataFuel app showing four scores: gut training, carb fuel, salt and recovery

You track everything, except what you put in your body.

  64%

take too few carbohydrates during a race.

up to 50%

get gastrointestinal complaints during long efforts, often from the wrong or too concentrated nutrition.

up to

higher risk of bone injury when you structurally under-fuel.

You’re not average. Your fuelling shouldn’t be either.

No two athletes burn through training the same way, so generic fuelling advice was never built for you. DataFuel uses your real training data to personalise what goes in your box, so every recommendation is built around how you train, not what works for everyone else.

You did the hard part. Don’t undo it.

Months of training can be undone by getting your fuelling wrong. Too little energy does not just cost performance. It slows recovery, limits adaptation and increases injury risk. We make sure your nutrition supports the work you have already put in.

The Robin to your Batman.

Your training and goals change throughout the season, and your fuelling should too. That is what the app is for: a fuelling plan for every session, four scores that show whether it worked, and recommendations that shift the moment your training does. You are never left guessing what is right next.

How it works.

Download the app

Free on the App Store. Android is coming soon.

Connect your wearable

Set your goals, your diet and your race, then link your wearable or Strava.

Receive your box

Delivered to your front doorstep every month.

Plan and track your fuelling sessions

Your plan tells you what to take and when. Afterwards you track your progress.

Integrates with

  • Strava
  • Garmin Connect
  • Polar
  • Oura

The DataFuel app.

Plan every session

  1. Start 4× isotonic 30 g carbs, 400 mg sodium per bottle
  2. min 45 Energy gel On the bike you absorb more than on the run
  3. min 90 Energy gel Holds you at 60 g an hour
  4. min 135 Caffeine gel For the last hour, when it starts to hurt
  5. After Recovery shake Inside 30 min: 46 g carbs, 20 g protein

Track your overall scores

  • 11 Gut training
  • 77 Carb fuel
  • 97 Hydration
  • 79 Recovery

Understand your scores

77
Slightly under Ø 52.2 g/h target 60.3 g/h

Related metrics

52.2 g/h Avg intake, target 60.3
2 / 12 Under-fuelled, below 60% of target
56% Taken on time
68% gel 32% drink, 0% bar

Carb intake per session (g/h)

Choose the brands you want in your box.

  • Maurten
  • SiS
  • Precision Fuel & Hydration
  • Etixx
  • 4 Endurance
  • Naak
  • Sanas
  • Holland & Barrett

See our supplements

Variable contents. Variable price.

Monthly subscription

From €39.95

per box, per month — shipping separate

  • Your training load decides what goes in the box, so it decides what you pay. A quiet month costs less than a build block.
  • The app comes with it at no extra cost. Without a box there is very little in it to use.
  • No minimum term. Skip or cancel from your profile whenever you want.
Simulate your box

Nothing is charged until you have seen what is in your first box.

What beta testers say

“I had never really considered that supplements could take me to a higher level. DataFuel changed that.”
Amine C. · Marathon runner
“I went from 45 to 75 grams an hour over eight weeks without a single bad stomach. I would never have dared to push that on my own.”
Wout D. · Triathlete
“I no longer have to search across ten different shops. Everything is in one place, matched to my training.”
Esther V. · Marathon runner
“Because of DataFuel I started paying attention to hydration and electrolytes, something I used to underestimate.”
Gijs T. · Marathon runner
“Before DataFuel I did not really know what to take, or when. Now I finally have clear direction.”
Timothy D. · Duathlete

Supported by

  • Start-it @KBC
  • StartLab

Frequently asked questions

What type of supplements are in the box?

Carb gels in different strengths, 30 g and 45 g, with or without caffeine. Electrolytes, carb loaders, recovery shakes, protein bars, cherry juice gummies, omega 3 and vitamin D. Which of them end up in your box, and how many, follows your own training data.

Can I choose my own gel brands and tastes in the box?

Yes. We work with several brands and a range of flavours, so you set what you like and what you would rather not have, and the box is composed around that.

How does payment work?

It is a monthly subscription, and the amount varies because the contents vary with your training. Before each delivery you have three days to change what is in your next box. Change nothing and it is confirmed automatically and charged as it stands. No minimum term, and you can cancel from your profile.

Can I use the app without a box?

You can install it and connect your training, but the four scores are built on the supplements you actually take, and those come from your box. Without one there is very little to score. The app and the box are one subscription for that reason.

Do I have to log every session?

Every session you log gets scored, and the more you log the more reliable the numbers get. The app tells you exactly how many sessions each score is based on. Logging is ticking off what you took from a box we sent you, so it is a few taps, not a food diary.

Which devices and apps are supported?

Strava, Polar, Oura and Apple Health connect directly. Without any of them you can add sessions by hand and everything still works.

Which sports are supported?

Running, cycling, swimming, triathlon and hybrid training. The engine works from load, duration and intensity, so any endurance discipline your app records can be scored.

All questions →

1 box. 4 scores. Unlimited fuelling plans. Cancel whenever.

Connect your training and see what your first box looks like before you pay for anything.

Simulate your box

Free to look at. You only pay once you confirm.