1. A portable electronic health coaching system for coaching a user through a health plan using a portable electronic device, comprising: a display screen; a user input; a satellite positioning system receiver; an accelerometer; a wireless communication transceiver; a memory; and one or more processors configured to: receive a first input corresponding to user nutritional consumption; receive a second input corresponding to user nutritional expenditure; calculate a nutritional value based on the first and second inputs; determine whether a coaching message is needed based on a comparison of the nutritional value to a predetermined value; and receive the coaching message.