Samsung Electronics Co. Ltd. ranks first among fitness-band makers for customer-satisfaction among U.S. residents, while Fitbit Inc. is second, according to a survey by J.D. Power and Associates. It said in a press release Tuesday that Samsung's wearable fitness tracker scored high in terms of performance, style and appearance, variety of features, battery life and durability, while Fitbit was noted for its reliability, ease of use, durability and availability of apps. “The wearable fitness tracking device industry is taking hold and competition is heating up,” Kirk Parsons,...