ChatGPT Health Misinterprets Apple Watch Data

Earlier this month, ChatGPT Health, which integrates with Apple Health, analyzed Geoffrey A. Fowler’s Apple Watch data — about 29 million steps and 6 million heartbeat measurements — and produced inconsistent cardiac health grades. The Washington Post found the tool relied on estimated VO2 max, ignored sensor-driven resting heart rate shifts, and repeatedly forgot demographic and lab details, producing grades that varied from F to B.