Apple Thursday pulled all apps from the App Store that linked to its new HealthKit app. 

According to a report on The Next Web (TNW), Apple said it is working quickly to resolve a critical flaw in iOS 8 that is affecting apps associated with the new operating system’s health tracking platform. 

Apps like MyFitnessPal and CARROT Fit, which had released updates that would work with HealthKit, were forced to pull those apps. Apple said that it expects new versions of those apps that will connect with HealthKit to be available by the end of the month. 

Apple had pitched the new health tracking features as a major part of its new iOS 8, iPhones and Apple Watch. 

TNW reports the following statement from Apple: 

“We discovered a bug that prevents us from making HealthKit apps available on iOS 8 today. We’re working quickly to have the bug fixed in a software update and have HealthKit apps available by the end of the month.”