This is Healthbook, Apple’s major first step into health & fitness tracking | 9to5Mac

Lead paragraph from a detailed app overview

"Seven years out from the original iPhone’s introduction, and four years past the iPad’s launch, Apple has found its next market ripe for reinvention: the mobile healthcare and fitness-tracking industry. Apple’s interest in healthcare and fitness tracking will be displayed in an iOS application codenamed Healthbook. I first wrote about Apple’s plans for Healthbook in January, and multiple sources working directly on the initiative’s development have since provided new details and images of Healthbook that provide a clearer view of Apple’s plans for dramatically transforming the mobile healthcare and fitness-tracking space…"

This is Healthbook, Apple’s major first step into health & fitness tracking | 9to5Mac