Exclusive: Two Apple medical trials shed light on how HealthKit will work

DexCom’s device measures glucose levels through a tiny sensor inserted under the skin of the abdomen. That data is transmitted every five minutes to a hand-held receiver, which works with a blood glucose meter. The glucose measuring system then sends the information to DexCom’s mobile app, on an iPhone, for instance.

Apple’s HealthKit is probably going to revolutionize clinical trial data gathering.