fuelOS

Food, supplements, and how you feel

Everything you put in your body. One place.

Snap a photo or scan a barcode. The card writes itself.

Download on iOS See how it works

Whole-body intake

Meals, pills, and your daily check-in

Down to the compound

Macros, micros, and the compounds underneath

Beside how you feel

See how intake lines up with your energy and focus

01Capture

Capture in one gesture.

Point the camera, talk, or scan a barcode. A meal, a supplement, whatever you take. The card appears and fills itself in as it reads. You never touch a form.

PHOTOSnap the plate.

VOICEJust say it.

SCANRead the barcode.

ANALYZING1:15 PM

Grilled Herb Chicken Bowl

Wood-fired chicken, roasted sweet potato, tahini.

0g0g0g

KCAL

MICRONUTRIENTS + BIOACTIVE

Curcumin ~38 mgBeta-glucans ~2.1 gOmega-3 ~0.8 g

CreatineSUPPLEMENT

5 g · 9:02 AM

+LOGGED

BPC-157PEPTIDE

250 mcg · 9:05 AM

+LOGGED

NMNENHANCEMENT

500 mg · 9:06 AM

+LOGGED

YOUR STACK · TODAYAUTO-LOGGED

Levothyroxine75 mcg · fastedMEDICATION

Creatine5 gSUPPLEMENT

Omega-32 caps · foodSUPPLEMENT

BPC-157250 mcgPEPTIDE

Tirzepatide2.5 mg · weeklyENHANCEMENT

MORNINGMORNINGMIDDAYEVENINGNIGHT

02The Stack

Supplements, meds, peptides —
one stack.

Everything you take — and exactly when. fuelOS keeps the whole stack on schedule and logs each dose as it’s due, so nothing slips.

03Down to the compound

Most apps stop at calories. fuelOS doesn't.

Macros first. Then 24 micronutrients. Then the bioactives almost no one tracks, like curcumin, beta-glucans, and polyphenols. Detail you'd normally hunt for, read straight from the photo.

GRILLED HERB CHICKEN BOWLREADING

MACROS · OF DAILY GOAL

Protein

0 / 80 g

Carbs

0 / 200 g

Fat

0 / 60 g

MOST APPS STOP HERE

MICRONUTRIENTS · 24 TRACKED

Iron~4 mg

Magnesium~38 mg

Zinc~2 mg

Vitamin B12~1.2 µg

Folate~60 µg

Potassium~480 mg

Selenium~18 µg

Vitamin D~2 µg

Choline~90 mg

Omega-3~0.8 g

+14 more

BIOACTIVE COMPOUNDS · RARE

Curcumin~38 mg

from the herb rub

Beta-carotene~6.2 mg

from the sweet potato

Sesamin~14 mg

from the tahini

Polyphenols~120 mg

from the herbs

CurcuminBeta-glucansOmega-3MagnesiumCreatineVitamin DPolyphenolsFiberLuteinCholineZincSeleniumProbioticsElectrolytesCollagenQuercetinIronFolatePotassiumB12

04How you feel

The night you slept well had a reason.
Your record holds what it was.

Everything you take sits on the same timeline as how you sleep and feel. Look at the two together and the quiet patterns surface.

check-in · your inputNOW

sleep · Apple HealthSOON

HRV · Apple HealthSOON

recovery · WHOOPSOON

Patterns, not predictions. Every link names the nights behind it.

YOUR LAST 14 DAYSLEARNING

Example shown · association, not a prediction

TOOK

FELT
↑ longer

TYPICAL

NIGHT 8 · MAGNESIUM

NIGHT 1TONIGHT

NIGHTS LOGGED

0 / 14

complete

MAGNESIUM NIGHTS

of 14

LINKED TO YOUR SLEEPEXAMPLE

Illustrative — your own links form as you log.

Magnesium

n = 11 / 14

pattern forming

longer

Creatine

n = 4 / 14

no clear link

On nights you took magnesium, your sleep ran ~0 min longer.

Ranked by how strongly each tracks with your sleep · sleep links arrive when Apple Health connects.

05Ask

Bring it into the chat you already use. Just ask.

A read-only fuelOS connector for ChatGPT and Claude — ask your own log in plain language.

ChatGPT

What am I quietly low on that my stack doesn’t already cover?

Used fuelOS · get_nutrient_trends · list_stack· read-only

Magnesium. You hit it just 0 of 30 days — averaging 0 mg against a 0 mg goal, and your stack (creatine, omega-3, D3) has nothing for it.

Ask anything

Claude

Have I actually cut back on added sugar, or does it just feel that way?

Used fuelOS · get_nutrient_trends· read-only

LIMIT · 25g

22g

4 WK AGOTODAY

Real — 0 g down to 0 g, now under your 25 g ceiling.

Reply to Claude…

06Reviews

Built for people who count what goes in.

★★★★★

“I've tried Yazio, Lifesum, Cal AI, SnapCalorie, MyFitnessPal… this one is easily the best. The UI is beautiful and the AI is more accurate.”

CHRONICALLYCURIOUS

★★★★★

“Intuitive design and features that let me tailor it to my goals. Quick and easy to actually keep up with.”

LILLIANZW

★★★★★

“It makes health and wellness feel simple, supportive, and realistic.”

LET US HAVE OUR PICTURES

FREE TO START

— A few AI meal scans a day
— Re-logging a past meal is always free
— The Stack and daily check-in

fuelOS PRO

Everything, unlimited

✦ Unlimited logging
✦ Micronutrient and bioactive estimates
✦ Analytics dashboard
✦ Apple Health and data export, anytime