Size Stream’s platform captures and delivers highly accurate body composition metrics using your smartphone
Measuring multiple health metrics creates a more complete and realistic picture of overall health, emphasizing that progress isn’t about a number on the scale, but instead, it’s about sustainable and well-rounded health improvements.
Body fat, a key component of body composition, is a critical measurement related to long-term health and fitness. Elevated body fat is linked to multiple chronic diseases and health consequences including:
- Cardiovascular disease
- Diabetes
- Metabolic syndrome
- Cancer
- Mobility issues
- Reduced life expectancy
Body mass index (BMI) is a simple and widely used tool to assess whether a person has a healthy body weight for their height. Unfortunately, it is also highly biased, ignoring critical inputs such as muscle mass, body fat distribution, gender, age, bone density, ethnicity and physical fitness.
Scan Subject 1 is shorter with a highly muscular build. His weight is driven largely by lean muscle rather than excess body fat, yet BMI considers only total mass relative to height. Because muscle is denser than fat, his BMI calculation places him in the “obese” category (BMI = 39.5), despite body composition data showing a strong, healthy physique with favorable fat levels and high functional fitness.
Scan Subject 2 is taller with less muscle mass and a slimmer appearance. His BMI falls within the “normal” range (BMI = 19.7), but this number does not account for lower lean mass, potential fat distribution concerns, or overall strength and conditioning. Without deeper analysis, BMI alone may suggest he is healthier than Subject 1, even though body composition insights tell a more nuanced story.
Our AI-powered body scan analysis uses 3D body measurements to produce a multitude of body composition metrics including:
- Body fat composition
- Body mass index
- Body surface area
- Bone mineral content
- Fat mass index
- Lean body index
- Lean body mass
- Resting metabolic rate
- Visceral adipose tissue
- Fitness Index
There are an abundance of tools and methods to measure the human body’s size, weight, body fat and other composition metrics.
Most simple low-cost options including traditional scales and bioimpedance devices lack accuracy.
Low cost
Low accuracy
