Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for monitoring a user's health data. A wearable fitness tracking device may include a heart-rate sensor, a steps taken sensor, a display, and perform operations including: receiving, from the heart-rate sensor, data representing the user's heart rate during a time period, receiving, from the steps taken sensor, data representing the number of steps taken by the user during the time period, determining a risk score for the user using the data representing the user's heart rate during the time period and the data representing the number of steps taken by the user during the time period, comparing the risk score to a threshold risk score, determining a risk profile using a result of comparing the risk score to the threshold risk score, and presenting data for the risk profile on the display.