iOS 27 brings GymKit to iPhone and AirPods, but what does it actually do?

iOS 27 adds GymKit support for iPhone, letting users tap the phone’s NFC reader to compatible cardio machines and use AirPods Pro 3 for heart-rate sensing, with the equipment’s data syncing to the Fitness app. The feature still requires GymKit-enabled machines and does not replace the broader capabilities of an Apple Watch.