Google Health initially included one-way Apple Health integration. The app could read and import health data recorded by an iPhone, Apple Watch, and other HealthKit-connected apps, but it couldn’t write Fitbit data back to Apple Health.
Today’s Google Health iOS app update adds the missing half of that connection.
Data concerning sleep, steps, workouts, and vitals captured by Google Health can now be sent to Apple Health. For someone who likes the Fitbit Air but really dislikes its app, this is good news.