Different pros: Design, the ability to choose screens to improve the appearance, the ability to select and install the necessary applications. In Has cons: During a workout, when you want to quickly see the pulse, you need to peer at the small inscriptions on the screen. Before that, I used the POLAR bracelet, there immediately in full screen with large numbers and color depending on the zone. It's a pity that Apple doesn't have the ability to choose the screen view during a workout.
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