Why is the Fitness App asking for a fee on my iPad when it's free on my iPhone?

The App on iPad is itself free to download but only offers access the Fitness+ subscription service and its fitness videos and training sessions. Its not asking you to pay for app, but for the Fitness+ subscription.

It does not have the activity tracking features of the iPhone app. It's basically just the iPhone's Fitness+ section in a larger screen.

Unless you are subscribed to Fitness+ the iPad app doesn't do much at all.