Ratio
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Estimated by visual analysis

Your body-fat percentage, from a single photo.

Ratio reads your photos and estimates your body composition — body fat, BMI and FFMI — with the legibility of a measuring instrument. No scale, no calipers.

Results in seconds
Your photos stay private
9:41
Result · Jun 2, 2026
Weight 76.2 kg · Apple Health
Body-fat percentage
14%
Athletic zone
OptimalHigh
Better than 78% of men aged 25–35.
BMI
Normal
23.8kg/m²
NormalHigh
Within the normal range for your height.
FFMI
Athletic
22.4
LowOptimal
Lean mass high — better than 78% of your age group.
Visual estimate · not a substitute for medical advice
Body fat
14%
Athletic zone
OptimalHigh
How it works

From photo to measurement, in three steps

No scale, no skinfold calipers. Ratio turns an image into a legible, repeatable benchmark.

01

One photo is enough

Import an existing gym photo or take one: front-facing, shirtless, abs engaged. Side or relaxed photos refine the measurement.

02

The model analyzes

A vision model estimates your body-fat percentage from the image. Weight is pulled from Apple Health to compute the derived indices.

03

A clear reading

A clean percentage, placed on a reference scale, alongside BMI and FFMI — and where you stand within your age group.

The app

An instrument, not a dashboard

A single column, left-aligned text, tabular figures. Every screen gets straight to the point.

9:41
New scan

Front photo

No photo
Face the camera
Shirtless
Abs engaged
Even lighting
Optional photos · refine the result
Capture

Clear instructions before the shot.

9:41
Result · Jun 2, 2026
Weight 76.2 kg · Apple Health
Body-fat percentage
14%
Athletic zone
OptimalHigh
Better than 78% of men aged 25–35.
BMI
Normal
23.8kg/m²
NormalHigh
Within the normal range for your height.
FFMI
Athletic
22.4
LowOptimal
Lean mass high — better than 78% of your age group.
Visual estimate · not a substitute for medical advice
Result

The percentage, placed on its scale.

9:41

History

Body fat · 3 months
−2.4PTS
Compare · Mar 1 → Jun 2
Mar 1
Jun 2
Body fat
−2.4 pts
BMI
−1.1
FFMI
+0.9
All scans
Jun 2, 2026
Body fat
14.0%
−0.8 pts
May 5, 2026
Body fat
14.8%
−1.1 pts
Apr 3, 2026
Body fat
15.9%
−0.5 pts
Mar 1, 2026
Body fat
16.4%
History

Compare two dates, follow the trend.

The metrics

Three indices, one standard of rigor

Each measure sits on an oriented scale — green always marks the favorable zone, whether low (body fat, BMI) or high (FFMI).

Body fat
Athletic
14%
OptimalHigh
The headline indicator. Better than 78% of men aged 25–35.
BMI
Normal
23.8kg/m²
NormalHigh
The weight-to-height ratio, sitting in its normal range.
FFMI
Athletic
22.4
LowOptimal
The lean-mass index. Here high — relevant for muscular builds.
Visual estimate. Ratio is not a substitute for medical advice.
Pricing

A free trial, then simple pricing

Seven days to try everything. Then two no-commitment plans — cancel anytime.

Estimated body-fat percentage
BMI and FFMI computed
Tracking and comparison over time
Unlimited scan history
7 days free, then €49.90 / yr. Cancel anytime.
Seriousness & privacy

An instrument you consult without apprehension

Your photos stay private

Images are used for analysis, not sharing. No public gallery, no social comparison.

A scale, not a judgment

Each measure is presented as a factual, contextualized benchmark — never as a verdict.

A benchmark, not a diagnosis

Ratio is a visual estimate meant for tracking. It does not replace a medical examination.

Questions

What you need to know

No. A front-facing, shirtless photo with abs engaged is enough — ideally a gym photo you already have. Extra photos (relaxed side, relaxed front) refine the estimate but stay optional.

Weight is pulled automatically from Apple Health on each scan, when available. It is used to compute BMI and FFMI.

Ratio relies on a vision model to estimate your body-fat percentage. It is a visual estimate designed as a tracking benchmark, repeatable over time — not a clinical measurement.

No. Your images are used only for analysis and your personal history. There is no public gallery and no social comparison.

Yes. The trial lasts 7 days, then the subscription is commitment-free and cancellable whenever you like from your account.

Measure your starting point.

One photo, one percentage, one trajectory. Start your 7-day free trial.