To connect a device or app via the Heads Up Health mobile app, please perform the following steps:
From the dashboard, tap the 'plus' sign and choose 'Add source'"
To connect Apple Health, FitBit, MyFitnessPal, Garmin and other popular devices and apps, tap the blue 'Connect with HumanAPI' button and follow the prompts:
Once the source has been connected, you can add supported metrics to your dashboard using the 'plus' sign and then 'Add Tiles'.
If you need to change the source for a given tile (for example, is Steps is showing 'FitBit' as the source and you want to change it to 'Apple Health') please see this article.