Know your body fat percentage – from a single photo.
Body Fat Scanner estimates your body fat percentage from your photos and shows your progress over time. No calipers, no expensive devices.
Estimate in seconds · Your data stays private
How it works
Three steps to your estimate.
Take a photo
Snap a photo following the in-app guidance – good lighting and the right distance help.
AI analyzes
The app reads visible body cues and estimates your body fat percentage from them.
Track progress
Save your scans and watch your trend in clear, simple charts.
What the app does
Everything you need to keep an eye on your body fat.
Photo-based estimate
Body fat percentage from your photos – no calipers or special gear.
Progress at a glance
All scans in one place, with trend curves over weeks and months.
Private & secure
Your photos and data are yours. Simple, clear privacy.
Fast & easy
A result in seconds, with no complicated setup.
Start for free
Download the app and make your first estimate.
Motivation that sticks
Visible progress keeps you going.
What is body fat percentage?
Body fat percentage is the share of your body weight that is fat. It tells you more than the scale alone because it separates fat from muscle and water – which is exactly what makes progress visible.
| Category | Men | Women |
|---|---|---|
| Essential fat | 2–5% | 10–13% |
| Athletic | 6–13% | 14–20% |
| Fit | 14–17% | 21–24% |
| Average | 18–24% | 25–31% |
| Elevated | 25%+ | 32%+ |
Orientation values – they vary by source, age, sex and method and are not a medical diagnosis.
FFMI – how much muscle is there?
The Fat-Free Mass Index (FFMI) relates your fat-free mass to your height – like BMI, but without the fat. It says more about your muscularity than BMI, which does not separate fat and muscle.
How we estimate the FFMI
Your estimated body fat percentage gives your fat mass. Subtract it from your weight and you get the fat-free mass (FFM). We then compute the FFMI like BMI – just with fat-free mass instead of total weight:
| Meaning | Men | Women |
|---|---|---|
| Low | below 18 | below 15 |
| Average | 18–20 | 15–17 |
| Above average | 20–22 | 17–19 |
| Very good | 22–24 | 19–21 |
| Top (near natural limit) | 24–26 | 21–22 |
Orientation values. The naturally achievable FFMI (without aids) is roughly around 25 (men) and 22 (women). Not a medical diagnosis.
How do you measure body fat?
Every method has its strengths. For everyday use, what matters most is measuring regularly under similar conditions – then the trend is meaningful.
| Method | Accuracy | Effort | Everyday |
|---|---|---|---|
| Photo estimate (app) | estimate | very low | very high |
| Caliper (skinfold) | medium, with practice | low | medium |
| BIA scale | fluctuates (hydration) | low | high |
| DEXA scan | very high (reference) | high (appointment/cost) | low |
Body Fat Scanner takes the photo route: no device, anytime – ideal for tracking the trend. For a one-off reference measurement, DEXA remains the gold standard.
A look inside the app
Clear result, simple history, no clutter.
An honest take
Body Fat Scanner gives you an estimate of your body fat percentage based on photos. How close it lands depends on the photo, lighting and pose – for meaningful trends, take photos under similar conditions.
Note: this app is not a medical device and does not replace professional measurement methods such as DEXA or caliper testing. Results are for information and motivation.
Frequently asked questions
How accurate is the estimate? +
The app provides an estimate, not a medical measurement. Accuracy depends on the photo, lighting and pose. For reliable trends, take photos under similar conditions.
Do I need gear like a caliper? +
No. All you need is your smartphone and a photo.
What happens to my photos? +
Your data is yours. The details are in our privacy policy.
Is the app free? +
You can download the app and get started. Any extra features are explained inside the app.
Which platforms is the app on? +
On Android via the Google Play Store. An iOS version is in the works.
Does the app replace a doctor or a DEXA scan? +
No. The app is not a medical device and does not replace professional measurement or medical advice.
Latest articles
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Read more →Ready to know your number?
Download Body Fat Scanner and make your first estimate – for free.