Grava — Free AI Calorie Tracker for iPhone

Q: How accurate is it, really?

No tracker — human or AI — knows a plate's exact calories, which is why apps that print "743" are lying to you politely. Grava gives a tight, realistic range, reads printed nutrition facts when they're visible, explains its reasoning, and lets you correct anything before it's logged. Consistent, honest estimates beat false precision.

Q: Will the cat make me feel bad about what I eat?

No. Mochi reacts to your food the way a cat would and otherwise just keeps you company. It never rates what you eat, comments on how much, or mentions your body, weight, or shape. If you'd rather it kept quiet, switch its voice to Gentle or Quiet in Settings.

Meet your companion

It eats what you log. It has opinions.

Every calorie app has a chart. Grava has a cat. It eats what you log, its mood follows your day, and it says exactly what it thinks about your lunch. Every Sunday it gets its own photo card, made to be shared.

Oh good, you're here. Mochi was getting bored.

Feed Mochi

Tap a food. Mochi eats it and tells you what it thinks.

It teases the food, never you. The cat wants a bite of whatever you log — it never rates your food, counts your portions, or mentions your body. Too much? Switch its voice to Gentle, or Quiet.

Why Grava

Tracking works. Tracking apps don't.

You already know a calorie target works. What fails is week two — when logging a sandwich takes longer than eating it. The problem was never your discipline. It was the data entry.

Search the database

Scrolling four hundred entries for "chicken breast, grilled" — and picking the wrong one anyway. Grava looks at your actual plate instead.

Weigh everything

No one weighs rice at a restaurant. Grava's AI judges the portion from the photo — item count, size against the plate, toppings and sides.

Guess and give up

When logging gets tedious, you round down, then skip, then quit. Grava keeps the cost of an honest log at one photo and one tap.

The best tracker isn't the most precise one. It's the one you're still using in March.

How it works

Snap. Confirm. Eat.

Snap — or just type

A photo of your plate. A screenshot of the delivery order. The menu, the nutrition label — or nothing but "two slices of pepperoni." Any of it works, alone or together.

The AI does the math

Grava judges the portion, reads any printed nutrition facts (and trusts them over guesses), and returns calories plus protein, carbs, and fat — with its reasoning written out. Every estimate shows its work.

You stay in charge

Nothing is logged until you say so. Tweak any number, or log it as-is with one tap. Curious what that dessert would cost? Snap it, look, and walk away — checking is free.

See it work

Five screens. That's the whole app.

No dashboards to configure, no streaks to protect, no feed to scroll. Three tabs and a camera button.

Grava's Log Food screen with Camera and Photos buttons and a text field reading 'Two eggs with 1 slice of toast'.

Grava's Confirm screen showing a 240–270 kcal estimated range, 270 kcal pre-filled for cut, and the AI's written reasoning under 'How this was estimated'.

Grava's Today screen showing 540 calories, a 1,940 kcal deficit, macros and three logged meals.

Grava's History calendar for July 2026 with deficit days tinted teal.

Grava's History list grouped by week, showing average calories per day for each week.

Scroll sideways for more →

Download on theApp Store Free · Sign in with Apple, then a one-minute setup

Honest by design

The only tracker honest enough to say 720–840.

A burrito is not exactly 743 calories, and no app on earth knows otherwise. Grava gives you the real range — then logs the end of it that protects your goal, so estimation error can never quietly sabotage you.

Chicken burrito with chips · estimated range

720 840

840 kcal logged

Cutting? Grava logs the top of the range — so hidden calories can't stall your deficit.

Bias the error in your favor

Pick a goal once and every estimate lands on the right side of uncertainty automatically: the top of the range when you're cutting, the middle at maintenance, the bottom when you're bulking. When nutrition facts are printed — a labeled snack, a diet soda — the range collapses to the exact number. And you can always override any value before it's logged.

Everything else

Small app. Sharp edges filed off.

The usual, in one tap

Foods you keep logging come back as one-tap rows, with your own corrected numbers. Had that yesterday too? Log it again from any entry.

Log from the Action button

Set the Action button to Log Food — or ask Siri, or search Spotlight — and Grava opens straight to the camera sheet.

Reads anything

Menus, nutrition labels, delivery-app screenshots — Grava reads the text in your images and trusts printed facts over guesses.

Shows its work

Every estimate comes with the AI's reasoning and a badge naming the model behind it — Gemini or On-device — so a quality downgrade is never silent. Trust it, or fix it.

Targets, computed for you

A one-minute setup computes your maintenance calories the standard way (Mifflin-St Jeor), plus ±1 lb and ±2 lb per week targets. Every day shows your deficit or surplus.

Your day ends at your bedtime

Midnight snack? It counts toward today, not tomorrow. Your calorie day can end as late as 6 AM — and Grava offers it automatically the first time you log past midnight.

History that tells the truth

Chart, calendar, or list — with weekly per-day averages so one big Saturday doesn't hide the trend. Tap any day for the full breakdown.

Syncs everywhere

Sign in with Apple keeps your history on iPhone, iPad, and Mac. A frontier cloud model does the estimating; on Apple Intelligence devices, an on-device model takes over when you're offline.

Pricing

Free. No asterisk.

Every calorie app you've tried wanted $70 a year for the part that actually works. Grava doesn't have that part, because there's no locked half.

Photo estimates run on a frontier AI model, which costs real money per meal. That cost is mine, not yours. If it ever has to change, it'll change out in the open — and everything you've logged stays yours either way.

No subscription. Not monthly, not yearly, not "lifetime."
No trial that expires. Nothing switches off on day eight.
No premium tier. Every feature is free. The only thing for sale is an extra companion, once, if you want one.
No ads, no data sale. You're not the product either.

Privacy

Your plate is your business.

What you eat is some of the most personal data there is. Grava treats it that way.

Photos are never stored. Your picture produces the estimate and is discarded — an entry keeps only the name, the numbers, and the time.
Sign in with Apple. No email-and-password account, no marketing list. Hide your email if you like.
Your log leaves when you do. Delete your account in the app and the whole history goes with it.
No ad tracking. No ads and no ad IDs. The app counts which features get used, anonymously, and you can switch that off. This page has no trackers at all.

FAQ

Fair questions.

Is it really free?

Yes — free to download, free to use, with no subscription, no expiring trial, and no features held back behind a premium tier. There are no ads and your food log is never sold. The one optional purchase is cosmetic: an extra companion, bought once. The AI estimates cost me money for every meal analyzed; that's a cost I've chosen to carry rather than charge you for.

How accurate is it, really?

Honest answer: no tracker — human or AI — knows a plate's exact calories, which is why apps that print "743" are lying to you politely. Grava gives a tight, realistic range, reads printed nutrition facts when they're visible, explains its reasoning, and lets you correct anything before it's logged. Consistent, honest estimates beat false precision — that's what actually moves weight.

What can I point it at?

A plate of food, a restaurant menu, a nutrition label, a delivery-app screenshot from your photo library, or no photo at all — a plain-text description works too. You can also add a note to any photo ("only ate half").

What do I need to run it?

An iPhone or iPad running iOS 26.5 or later, or an Apple Silicon Mac. Grava is built on features that only exist in the newest OS, which is why the bar is high. Apple Intelligence is optional — it powers the offline estimates only, and everything else works without it.

Does it need an internet connection?

Grava is best online, where a frontier cloud model does the estimating. Offline, devices with Apple Intelligence fall back to a model running entirely on your phone. Without Apple Intelligence, offline means manual entry — which always works.

Does Grava keep my food photos?

No. The photo is used to produce the estimate and then discarded — there is no image field in the database at all. A saved entry holds the food's name, the calories and macros, and the timestamp. Nothing else.

Will the cat make me feel bad about what I eat?

No. Mochi reacts to your food the way a cat would — "Pizza! Mochi would like the crust, please." — and the rest of the time just keeps you company. It never rates what you eat, comments on how much, or mentions your body, weight, or shape. If you'd rather it kept quiet, switch its voice to Gentle or Quiet in Settings.

Is there an Android version?

Not yet — Grava is built deeply on Apple's platforms (Apple Intelligence, Sign in with Apple). iPhone first, done right.

Calorie counting, without the counting.

It eats what you log. It has opinions.

Tracking works. Tracking apps don't.