F Health Corporation, in collaboration with Arizona State University, is developing personal devices that can be worn like badges on the body or clothing to monitor air and breath composition. In particular, they are developing a flow-colorimetric sensing device for continuous monitoring of multiple air pollutants to ensure health safety in polluted environments. Additionally, they are creating a breath-fat oxidation sensor that detects acetone levels in the breath, as acetone is a key marker of fat burning. This device will help people in weight loss and dietary programs measure the efficiency of their practices.