I could easily port to the fenix3, I just need a victim to test it. That said, I'm not sure how useful it is. The fenix3 and 920xt allow users to create activity profiles for many more activity types than the vivoactive. For example, on a 920xt, you can create a custom activity profile for each of these types.
- Running
- Run
- Run Indoor
- Treadmill
- Trail
- Race
- Custom
- Cycling
- Bike
- Bike Indoor
- Trainer
- Road
- Mountain
- Race
- Custom
- Pool Swimming
- Pool Swim
- Race
- Custom
- Open Water Swimming
- Open Water
- Race
- Custom
- Ski/Board
- Ski
- Snowboard
- Other
- Custom
- Multisport
- Triathlon
- Duathlon
- Brick
- Custom
- Other
- Hike
- Paddle
- Row
- Strength
- Cardio
- Other
- Custom
That does leave a few that are not in the native app but are in the Activity Recorder, but not many.
Travis