Launch of iOS 8 has a hitch; HealthKit compatible apps are removed from the App Store
According to a tweet from developer Brian Mueller, Apple has removed all HealthKit compatible apps from the App Store. The list includes Mueller's own Carrot Fit, calorie counter MyFitnessPal, and WebMD. All three had support for the HealthKit initiative that comes with iOS 8, including the Health app.
Apple is said to be working on a fix for the problem, but it looks like all apps that integrate with the Health application will have to sit out today's launch of iOS 8. An earlier tweet from Mueller indicated that the problems could last throughout the remainder of the week.
source: @BrianMueller333, 9to5Mac via Engadget