The Fitbit Ionic looks awesome, but it's only compatible for swimming laps in a pool.
The main competition, the watch with a certain fruit name, can be used in the sea and it will use GPS to map the workout and track distance / calories / speed. Other trackers have GPS, water resistance, but curiously aren't capable of using the GPS while swimming, but can be tricked by choosing a "Running" exercise and just jumping into the water. That makes me believe that the only thing stopping FitBit supporting this feature is just software, as all the hardware sensors and capabilities is already there.
Please consider implementing an "Open water swim" workout that uses GPS to track calories / distance for swimming, instead of laps.
Moderator Edit: Title for Clarity/Added Labels
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