iPhone Screenshots


Fat -Byte performs body composition estimates and much more by one digital image from your smartphone. It’s a valuable tool for monitoring your body fat, and to perform anthropometry to help refining body composition and well-being.
Fat estimates were validated confronting Fat-Byte to DXA examination (Dual Energy X-ray Absorptiometry) in a group of subjects with BMI 18 -33. http://www.mdpi.com/1424-8220/16/12/2163

The current lifestyle of many in the World has led to marked changes in the body composition of a high percentage of its citizens where way too many people are obese. It is now recognised that BMI is a relatively poor measure of body composition and dependence on it for determining intervention strategies can be misleading.
The use of personal health assessment in weight management is a burgeoning approach in management of overweight and obesity. An attraction of this preventive approach is the privacy and convenience of performing these activities at home.

This App allow users that can range from individuals, community health workers, sportspersons and medical professionals to obtain an accurate and rapid measure of body composition including fat mass using a mobile phone with our patented software.
The principle relies on obtaining a digital image of the subject taken laterally against a homogenous light coloured background- The software then converts the image into a two fundamental colour image from the eyes to the ankle.The raw image together with the subject’s, age, height, weight and gender is acquired either by built in camera or uploaded from memory into the phone App and the software after conditioning the image, gives an accurate estimate of body fat.
The software has been validated by comparing the data obtained from a range of subjects of differing body composition (BMI 18 >33) using the photo application with figures obtained using 2 different reference methods of dual energy X-ray absorptiometry and underwater weighing the first one to construct and the second to validate the fat estimating equation. The squared correlation coefficient between the two techniques was r 2 > 0.95 indicating that photo technique could be applied with confidence to a wide range of clinical and non-clinical applications.(1)(3)
A European patent application has been made (2), and it has been extended world-wide (PCT)

1 .De Lorenzo et al Is Digital Image Acquisition (DIP) a Valid New Tool for Preoperative Body Composition Assessment? a Validation by Dual-energy X-ray Absorptiometry Obesity Surgery 16,560-566

2. European Patent Pending (N° 15425037-7-/EP15425037)

3. H.Lukaski et al. A Smartphone Application for Personal Assessments of Body Composition and Phenotyping http://www.mdpi.com/1424-8220/16/12/2163

What’s New

Version 1.1.3

iOS 12 compatibility issue fixed

Ratings and Reviews

Thesuzmom ,

Nice try

Nice idea but photo integration needs work. Using photo from roll doesn’t work. Can’t see photo. Only white on black. Percent is very far from caliper readings or scale readings. Don’t believe I can trust the analysis.

Developer Response ,

The black and white shape is achieved only after that the original picture has been conditioned. The touch up palettes are helping to get a clean profile necessary to obtain valid estimates and should be used eith care snd accuracy. Finally dragging horizontal lines exactly over eyline and ankles is absolutely needed. Height in centimeters also.
Calipers (skinfokd) are not quite a reference method. Please read the validation study vs DXA standard.
Any body composition method unless performed with adequate skill is subject to errors. We encourage propedeutic test to get to an acceptable top if your learning curve
Thanks for your feed back!
Please visit www.fatbytesrl.com

SolemnVowsFan ,

Love it!!

This app is genius and it could really benefit millions of people.


Fat Byte S.R.L.
126.8 MB

Requires iOS 10.3 or later. Compatible with iPhone, iPad, and iPod touch.

Age Rating
Frequent/Intense Medical/Treatment Information
In-App Purchases
  1. Body Composition $0.99
  2. Lateral cross section measurements $0.99
  3. Purchase all features $1.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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