I had turned the Bluetooth radio off in my original Pebble Watch since I don’t really wear it anymore and the battery went over a month on a single charge. My new Pebble Time Watch probably works almost as long if I turned the radio off. But any smartwatch would be hampered without using the wireless radio. And now my PT watch can answer text messages via voice, it has a mic built-in, and it’s now tied into HealthKit on the iPhone. Even less of a reason for the overpriced Apple Watch.