A Zentner Labs app.
Zentner Labs Health is a private, personal tool built and used solely by its owner. It reads the owner's own Google Health data — sleep, heart rate, heart rate variability (HRV), steps, weight, and body fat — to produce daily reports for their personal coaching assistants.
The app is not offered to the public. It accesses only the owner's own Google account data, with their consent, and is not available for other users to sign up for or use.