it’s a social network. Some people do post things related to health and fitness, and it’s another gold mine of private data for ad targeting, so from a business perspective it makes sense to have features that integrate Instagram with these health and fitness gadgets.

This list is a summary of the data they may collect. Using these apps don’t mean you’re handing all this info automatically. Most of these are actually voluntarily shared e.g. when the user connects a fitness app to it; or actively requested e.g. when they make use of location sharing in the in-app chat.

The more in-app functionality a user makes use of, the more data they’ll hoard about that user.