Measuring your body regularly is a common way to keep track of muscle gain and weight loss progress. The ZOZOSUIT is a 3D body scanner suit that combines with your phone to capture highly accurate body scans, so you can see the changes your body is going through as you exercise. The companion app tracks changes of 1/4 of an inch. It offers optional Apple Health integration.
Thanks to the ZOZOSUIT, you can track changes in chest, waist, thigh, hips, calves, and other areas. It has a ColorMetric system to highlight changes. It is available for iOS and Android devices. You can find out more about it here.