MyHealth - iOS - Is MyHealth compatible with Apple Health?

Yes! Since version v5.0.3, you can import and export your data between MyHealth and Apple Health.

To share your data between MyHealth and Apple Health, follow the below steps:

1. Check the version number of your app (5.0.3 minimum). If necessary, update it.

2. Select ACCOUNT, scroll down to MY PREFERENCES, tap on APPLE HEALTH and active the link

3. Select and allow the data you want to share between MyHealth and Apple Health.

Important:

If you want to modify or disable Apple Health synchronization, we recommend you to follow below steps:

1. Open the Health app.
2. Tap your profile avatar in the upper-right corner. 
3. Under Privacy, tap Apps. You can see apps that you already own that are compatible with Health. If you don't see an app, it might not be compatible. 
4. Tap an app and turn on the health categories that you want that app to track.
   source: https://support.apple.com/en-us/HT204351