Currently no auto detect on workouts. You have to start the workout in the app. I think however Ringconn will continue to work on this feature. So fingers crossed not long before it can.
They gonna add paywall soon, maybe as ultra human, or different. CEO even mentioned that sleep apnea will be avaiable behind pay wall x). Having no subscription and not doing new accesories like watch, sugar meter etc... the company cannot survive, maybe if they release one ring every year but... We will see, atm am sad that they are not transparent about future pay walls.
So at the moment no mention of a paywall. I think because there has been so much talk and marketing around not having a subscription I would be very surprised if they did.