I'll be brief -- 1. What do you want to change in Apple's stock fitness app on the Apple Watch? 2. What don't you need? 3. How would you rebuild the app without loading it with features nobody else needs? Personal wants: Tracking weights and reps per lifting exercise; Custom circuit workout programming; HR; Jogging duration; Interval timer (sprints, Tabata, etc); Don't need: All indoor cardio equipment; Swimming; Run mapping or cadence; Bike mapping, pedaling cadence; Elevation Now, I don't have an answer for the third question. Would it need to be a user-configurable app, then? If we go down that path, can it stay simple to use? Or would it ultimately be simpler to use third-party apps like we can do now?