Switching connected health apps - how does Active calculate my progress throughout the day?

Active calculates your progress throughout the day from the health app you have selected in the Connected Health Apps menu in your profile (“Me”). At midnight we save your progress for that day based on the health app you have selected. For example, if you switch connected health apps between Apple Health and Fitbit multiple times throughout the day and Fitbit is connected to your account at midnight, Active will save your progress from Fitbit for that day.

In your settings you can check your weekly history to see which health app you have been using to connect with Active.