iOS · physique analysis
ProportionIQ reads a photo and gives you a body-fat range, an FFMI, a score for each of twelve muscle groups, and the proportion your frame is measured against. Where the photo can't support one of those answers it leaves the number blank and names the shot to retake.
Free score, one scan a week. Your first scan needs no account. 18+
One lens on proportion and composition. Not your health, and not your worth.
How it works
The front photo is the only one that's required. Side and back sharpen the read. Before anything is sent, the app proposes a crop around your body, because legs falling outside the frame is the most common reason a scan comes back with four groups blank.
Grok reads the photos. Then a versioned scoring engine on our server turns that read into your numbers, which is what stops a model retune from quietly rewriting your history six months from now. Some scan-to-scan wiggle is normal. The app tells you how much.
Your score arrives with a walkthrough that plays over your own photo. Where the shoulder line landed, what the taper measured, which groups it could see, which it couldn't.
The Visual Assessment
Tap through it like a story. The shoulder line draws itself across your deltoids. The waist line hunts for your narrowest row with your arms excluded, because an elbow in the measurement makes the whole ratio junk. Muscle groups light up one at a time, warped onto the joints your phone found in your own shot. Raise an arm and the bicep tilts with it. All of it runs on your phone.
Eight groups can be drawn from a front photo. Lats, glutes, hamstrings and triceps need a back-view atlas we haven't built.
Symmetry stays blank. Your torso is rotated a few degrees off square, and any left-right number would be measuring your stance instead of you. Stand square with your arms relaxed and I'll read it next scan.
Proportion
We measure the ratio off your own outline, then compare it to the classical reference for your sex: shoulder-to-waist against 1.618 for men, waist-to-hip against 0.70 for women. Ideal Targets scale off your wrist and ankle. A smaller frame gets measured against its own skeleton rather than somebody else's.
These references come from a classical aesthetic convention, which is to say a few thousand years of sculptors agreeing with each other. They say nothing about health. There is no correct body, and that sentence sits on the same screen as the number inside the app.
Muscle Map
Every group the model could see gets a 0 to 100 and a note about what to train. Every group it couldn't see gets the words "Not assessed" and stays out of your radar, out of your weak-point plan, and out of your average. An earlier build scored unseen groups as zero, which cheerfully told people their legs were their lowest group when the photo had stopped at the knee. We fixed it before launch. That bug is why the blanks exist.
Composition & progress
A body-fat range, an FFMI and lean mass. Seven metrics trend over time along with all twelve groups, and a move smaller than the noise floor gets reported as held rather than dressed up as progress. Pick two to four groups to focus on for the cycle and the next scan tells you whether those were the ones that moved.
We can't see whether you trained. So the app says the groups you picked went up and stops there. A flat month is a maintained month.
AI Coach
Ask why your Proportion score moved and the answer gets built from your own scan and trend rather than from general advice. The Coach also writes the plan. It picks the groups that are behind, attaches a training cue matched to your experience level, and puts macro targets on screen with the arithmetic left visible, down to the activity multiplier it assumed for you.
Fuel fails closed. Without positive evidence you sit above the athletic band it holds at maintenance and says why. Deficits cap at 400 calories.
What it won't do
A photo can only carry so much information. We would rather hand you fewer answers and have them hold up.
Free shows body fat as a range, and Pro shows a point with the band still drawn around it. No photo earns a bare decimal.
A sheet on every estimate: what it is, why it's a range, what sharpens it, and how much run-to-run variation to expect. Free, on every scan.
Within a week, sub-score moves inside ±3 hold at their prior value. Anything at 3 or beyond passes straight through.
In the Full Analysis, a shaky read is labelled a shaky read. That's a statement about our estimate. It is never a statement about you.
Privacy
Your photo rides inside a single request to xAI's Grok API for the read, and it is gone when the answer comes back. We write nothing to storage on our side. The full chain is in the Privacy Policy.
Blurring happens on your phone, before the photo leaves it. You can switch it off in Settings.
Your photo history lives on your device, encrypted. Delete a photo, or the whole account, whenever you want.
No third-party ad SDKs and no cross-app tracking. Anything you connect from Apple Health stays on your phone.
One optional reminder on Monday morning, off until you ask for it. And if the app ever routes you to support resources, every scheduled notification stops for a week.
Pricing
Every scan gives you your ProportionIQ Score, your body-fat range, your Archetype and your percentile, free, one scan a week. Pro opens the Full Analysis: all twelve group scores, the proportion breakdown, Ideal Targets, trends, comparisons, the AI Coach, and the long cut of the Visual Assessment.
New subscribers get 7 days free on the annual plan. Both plans renew automatically until you cancel, which you can do any time from your Apple ID settings.
One photo, your numbers, and a blank where your legs were out of frame.
Download on the App StoreProportionIQ is for adults 18 and over. Every output is an AI estimate, made for information and motivation and nothing more. It is not a medical device, it does not diagnose or treat anything, and it does not replace a professional. Proportion references come from a classical aesthetic convention rather than a health standard. A physique score is one lens on one part of you. It says nothing about your health, and nothing about your worth.