Now that iOS 8.0.2 is out with support for the Health app enabled, third-party developers are starting to roll out their apps with HealthKit support. The list isn't very long yet, but it is growing so we expect to see more apps showing up soon.
Apple's Health app is open for business thanks to iOS 8.0.2
HealthKit works as a common platform and conduit for collecting health, fitness, and medical-related data from apps from devices connected to your iPhone. That data can be viewed in iOS 8's Health app so you can see all of that information together and hopefully learn more about yourself than you could by viewing the data as segregated bits.
Apple promised Health support with the launch of iOS 8 earlier this month, but later said that would come in an update. iOS 8.0.1 with Health and HealthKit support rolled out a week after iOS 8 was released, but was quickly pulled because it disabled Touch ID along with cell service in the iPhone 6 and iPhone 6 Plus.
Now that iOS 8.0.2 is available, we can start trying out Health-compatible apps, and we don't have to worry about our phone features disappearing in the process.
Carrot Fit Carrot Fit tracks your workouts and what you eat, then offers you rewards or light-hearted shaming depending on your performance. Version 3.1.1 adds HealthKit support, so now you can monitor your progress in Apple's Health app. Carrot Fit  costs US$2.99.
FitPort Like Apple's own Health app, FitPort is a sort of dashboard showing an overview of your health and fitness activities. The app tracks the same sorts of data such as steps, how far you walk or run, calories burned, and weight. Instead of working as a data supplier to Health, FitPort is an alternative. FitPort  costs $1.99.
FitPort Uses HealthKit to display your fitness activity, like Apple's Health app
Lark The Lark app aims to collect your fitness and activity data from multiple sources thanks to HealthKit, and then present that information in a meaningful way that helps improve your overall life. It can log and analyze step counts and other activities logged by your iPhone's M7 or M8 motion coprocessor, tracks sleep patterns, and lets you log what you eat, then presents its suggestions for improvement in a conversational form. Lark  is a free App Store download.
MotionX 24/7 Tracking sleep patterns can help improve your overall sleep quality. MotionX 24/7 uses your iPhone's motion sensor and microphone to log when your sleeping well, when you're restless, and then uses that information to wake you at the appropriate point in your sleep cycle. Version 9.3 adds the ability to send your sleep data to Apple's Health app. MotionX 24/7  is priced at $0.99.
Use your iPhone to track sleep patterns with MotionX 24/7
MyFitnessPal Logging what you eat and tracking your eating habits is MyFitnessPal's, well, bread and butter. Version 5.6.6 lets you send your weight, exercise logs, and mea summaries to Apple's Health app via HealthKit. MyFitnessPal  is free.
Patient IO If your doctor is part of the Patient IO network, you can use the Patient IO app to get health-related information and treatment instructions, reminders for your health tasks, and more. The data you collect through Patient IO can be shared with your doctors, too, thanks to the app's HealthKit support. Patient IO  is free, but your doctor must support the system for you to use the app.
Patient IO links to Health to share medical data with your doctors
UP Jawbone's new UP app tracks your dail step count and lets you log what you eat, workouts, sleep, and more even if you don't use an Up or Up24 fitness tracker. It also helps set personal fitness goals, and lets you share your stats with friends for motivation. The app links to Health to collect your activities and displays the data in its own interface. UP is a free download.
WebMD WebMD is known for its health-related content, symptom-checking tools and medicine database, but the service's iPhone app does more by helping track your overall health and fitness. Version 5.3.3 added HealthKit support so you can get, as WebMD calls it, "actionable insights on your health data." WebMD  is free.
Yummly Your iPhone can be your never ending cook book thanks to the huge recipe database Yummly offers. The app also sends nutrition information for what you eat â" assuming you're meals are Yummly recipes. Yummly  is free at Apple's iTunes-based App Store.
Zova Zova offers workouts geared just for women. It includes more than 250 workout plans for stretching and circuits, strength training, HIIT, 7-minute workouts, and cardio fitness. The app tracks your workouts and fitness progress, and has been updated to support HealthKit, too. Zova  is a free download.
Zova targets workouts for women and shares your progress with the Health app
More apps will be rolling out regularly now that iOS 8.0.2 is available. We'll keep adding those apps to the list as we find them. Have you found any HealthKit-compatible apps? Let us know.
[Updated with more HealthKit compatible apps]