Methods, systems, and apparatus, including computer programs encoded on computer storage media, for providing user attribute prompts. One wearable attribute tracking device may include one or more user attribute sensors, a speaker, and a display and perform operations including: receiving, from the user attribute sensors, user attribute data for a user wearing the wearable attribute tracking device, determining target attribute data for the user, comparing the user attribute data with the target attribute data to determine attribute differences, determining historical data for the user, determining an attribute prompt using the attribute differences and the historical data, and providing, for presentation to the user by at least one of the speaker or the display, the attribute prompt.