Multiple Apple Watch, Google Fit, and Fitbit Users Can Compete on Activity, Here's How
Compete with multiple people on the Challenges app, regardless of their fitness tracking device.
Competing against friends in the Fitness app on your iPhone can be enjoyable, but you can only participate with one other Apple Watch owner per competition. However, with the help of the Competitions app, you can compete against more than one friend, even if they use a different fitness tracker.
