Embodiments of the present application relate generally to electrical and electronic hardware, computer software, wired and wireless network communications, wearable, hand held, portable computing devices for facilitating communication of information, and the fields of healthcare and personal health. More specifically the present application relates to a new and useful systems, methods and apparatus for estimating body fat in a user with applications in the healthcare and personal health fields. An electronic device, such as a portable electronic device (e.g., smartphone, pad, tablet, etc.) may include software (e.g., an APP) to implement body fat estimates of a user and may use hardware and/or software resident in the electronic device (e.g., display, accelerometer, gyroscopes, transducers, vibration engines, speakers, microphones, GPS capability, etc.) to aid a user in placing the electronic device at instructed location on the user's body and to apply an impulse to the body at instructed locations.
