For iPhone · Fourteen days free
CoreFuel breaks a photo, or a sentence, into named items with calories and macros for each. Correct what it got wrong and it lands on your day. Didn’t finish? Say what was left, and the day recounts itself.
FOURTEEN FREE DAYS ON EVERY NEW ACCOUNT · NOTHING TO ENTER
How it works
Also on this plate
Nobody photographed the oil. It was inferred from the dish, listed at lower confidence, and is yours to remove.
01 · Three ways in
The fast ways in. Whichever you use, the estimate arrives as named items, each with its own calories and macros, and every one is yours to change before it counts.
Photo
Whole plate in frame. Shoot from where you sit; we correct for angle, not for a missing edge. Items you did not photograph but must have eaten, like the oil the rice was cooked in, are listed at lower confidence so you can keep or remove them.
Anything that comes back above 1,000 kcal is refused and the plate is re-examined by a larger model. Totals are recomputed from the items, never taken on trust.
Voice
We read the whole sentence, not keywords. Before anything is worked out, your words go back on screen for you to check, because a misheard food is not a typo you notice later. It is the input to the calorie figure.
The recording is never kept. Not on the phone, not on the server.
Barcode
Barcodes are looked up in Open Food Facts, the crowd-sourced database, and credited as such in the app. If a code is not there, enter the figures from the label and it is yours from then on.
ALSO: A PHOTO FROM YOUR LIBRARY · SEARCH YOUR OWN HISTORY AND THE COREFUEL FOOD DATABASE · TYPE A SENTENCE · ENTER IT BY HAND, NO AI
Stop and read it back · then, heard you
“I had two scrambled eggs on sourdough toast with a flat white and a handful of blueberries.”
That’s what we heard. Estimate from it, or say it again.
2.3 s
From tapping stop to the sentence on screen, word for word.
5 items
441 kcal. “Two” read as a quantity, “handful” kept as the unit.
+ butter
Added for the scrambling, at lower confidence. Nobody mentioned it.
02 · Leftovers
Open the meal, tap Log leftovers, and tell CoreFuel what stayed on the plate. The meal recounts to what you ate, and so does the day.
Photograph
We compare it with the photo you logged when we can. When we can’t, we judge from the one photo, hold our confidence lower, and tell you so.
Say or type
“Left half the rice and most of the slaw.”
By hand
No AI at all.
You review every item before anything is saved, and the correction is reversible.
The day recounts itself
Tap how much of each meal you actually ate. The three meals are Monday’s, from the screen above.
1,110/ 2,638 kcal
AS SERVED · 235 KCAL
AS SERVED · 565 KCAL
AS SERVED · 310 KCAL
03 · Where the numbers come from
Most of what you see in CoreFuel is arithmetic you can check. A model is used in six places, where reading a plate, hearing a sentence or interpreting a week takes judgement, and nowhere else.
A formula you can check
Mifflin–St Jeor for resting energy, a stated activity multiplier, a goal offset, clamped to a sane range. Protein from bodyweight. The equation is named on screen, with the 1990 paper and the IOM reference intakes linked.
Percentiles and z-scores against your own baseline, shrunk toward published priors, a weighted mean, threshold rules. Statistics, not a model.
Compare your last two check-in weights. If a weight-loss target has stalled, take 100 kcal off, down to a floor.
A template filled from your day. Not written by a model.
Where a model is used · six places, no others
No percentages on a photo log. When an estimate is unsure it says so in words: CONFIDENT ON THE FOOD, LESS ON THE PORTION.
Why there is a second model
35,895kcal, for one poke bowl
That was a real answer, once. The fix was not to scale a bad number, which invents data. Now any estimate above 1,000 kcal is refused and re-examined by a larger model, whether it came from a photo or a sentence, and every total is recomputed from its items. A hard meal costs us more. It does not cost you a wrong day.
04 · Your day
Today names the day, counts what is left to eat and lists what you logged. Under the sentence sit the two or three body readings that produced it, each naming its source.
Because
Sleep in hours and minutes, HRV in milliseconds against your own baseline, resting heart rate. Each says where it was read from, and the full Readiness screen sits one tap behind it.
Targets
Every number editable, its source beside it, and a live preview of what a goal change does before you choose it. Set next week’s target in advance and it takes effect on your Monday.
Check-in
Once a week: weight, a note, optional progress photos. It re-tunes the target from real weight data and proposes what changes next week, for you to approve. The week digest closes with COACH, the one passage a model writes for you.
A missed day
Pick it on the week strip and log into it exactly as you would log into today. Kilograms or pounds, light or dark — both are yours to set, and the app shows what switching units does to your own numbers.
Read with permission
Read only for the types you allow, and you can refuse any of them. The only thing CoreFuel writes back is the weight you typed at check-in.
05 · Privacy
Each permission names its limit on the screen that asks for it. This is the short version; the full summary is one page.
Voice is transcribed, then the audio is discarded. Not on the phone, not on the server.
A plate photo is uploaded to be analysed. It is not processed on the device, and we do not say otherwise.
Delete account is in the app, with no request form. It erases your meals, photos, check-ins, targets and the account itself.
Health data is read only for the types you allow. The only thing CoreFuel writes back is the weight you typed at check-in.
No password to hold, no email login, no guest mode.
What you have logged, as one file, from inside the app. Long histories come back most-recent-first.
06 · Pricing
Every new account starts with fourteen free days. It is CoreFuel’s own trial, so there is no card and nothing to enter. After that, CoreFuel Plus renews monthly, at the price shown in the App Store for your country.
There is no lite tier and no upsell inside the app. One subscription, every measurement. Everything is included.
Install CoreFuel, sign in with Apple, and let it fill your facts from Apple Health. Fourteen days free, nothing to enter.
