Fitbit Charge 4 update brings Sp02, skin temperature tracking - Android

Fitbit rolled out some advanced features to its latest line of smartwatches, the Versa and the Sense and eventually to the Ionic too. Now the Fitbit Charge 4 will be getting new features as well in its firmware update. This includes Sp02 or blood oxygen tracking, skin temperature tracking, and a new Health Metrics dashboard. […]