Coach

An iOS app that tracks your weight, food, and recovery in one place, then tells you what the numbers actually say. Food logging is a conversation ("chicken burrito and a beer" gets you macros, not a form), and the insights are deterministic code with a mandatory not-enough-data branch, which is the difference between an insights feature and a horoscope.

Architecture diagram:

Text alternative

Weight and activity come from Apple Health, recovery and sleep from Whoop, and food from a conversational logger that turns plain English into macros. Everything lands in one store, and deterministic analyzers on the device compute the daily calorie target and insights, including saying not enough data when that is the honest answer.