There are dozens of fitness apps and wearables, and Strava’s new rules will make it harder to get all that data in one place. The reality is many smaller fitness apps and wearable makers don’t have the resources to strike up direct data integrations with the thousands of other fitness apps and devices on the market. It’s much easier for everyone to use Strava’s API and call it a day. And unlike Apple’s HealthKit API or Google’s Health Connect, Strava is platform-agnostic.
https://www.theverge.com/2024/11/22/24303124/strava-fitness-data-wearables