F SOMEONE ASKS you, “How are you doing?” and you feel the need to pull up your tracker app, we get you. Humanity has entered the golden age of health and fitness tracking. Everybody wears a tracker now, whether strapped around the wrist or cuffed around a finger. The global tracker industry was already worth US$41 billion in 2021, and it is forecast to grow to more than US$138 billion by 2028. A legion of companies – Garmin, Fitbit, Whoop, Oura,
