In addition to supporting WatchKit and the Apple Watch, the iOS 8.2 software update will re-introduce some previously removed features in Apple’s Health app on iOS 8 as well as provide some feature enhancements. As discovered in the latest iOS 8.2 beta for developers, Apple is reintroducing support for blood glucose tracking through the iOS 8 Health app after an issue with which unit of measurement the app defaulted to presenting problems for international users of the feature. The somewhat intimidating Health app is also getting a little smarter with brief descriptions for the various data points tracked by the app listed under each section. Read more
The Health app lets you manually enter and view blood glucose values in mg/dL (milligrams per deciliter). This unit of measurement is used by a number of countries, while some other countries use mmol/L (millimoles per liter).
HealthKit supports both units of measurement. However, if you measure your blood glucose using a device that displays mmol/L, those values can’t be manually entered or displayed in the Health app with that unit of measurement.
To prevent confusion in countries where mmol/L is commonly used, we’ll soon release a software update that will temporarily remove the ability to manually enter and view blood glucose values in the Health app while we work on an update to support both units of measurement.
If you have previously entered values manually in the Health app, you’ll no longer see this data in the Health app after the update. However, your data won’t be deleted, and other apps with permission to read health data will still have access to blood glucose values that you previously entered.
Third-party apps will continue to be able to support both units of measurement and can continue to use HealthKit APIs to store blood glucose data.