Frankly, to me a smartphone with any kind of fitness activity feels like a step 20 years backwards to the times of Discmans with "electric skip protection".. they are devices I end up having to babysit. No rain, no sweat, too massive to carry comfortably without the wonky looking massive arm straps or bike holders, unstable apps, a user interface requiring complex interaction patters not at all suited to fitness activities, and most of all, horrible battery life.
Meanwhile, my Garmin 810 sits on the bike and can go 12+ hours with GPS and display on. It has hardware buttons for the important stuff and a touchscreen that still works in the rain with a zero chance of ending up in some freaking "Google now" screen accidentally.
Meanwhile, my Garmin 810 sits on the bike and can go 12+ hours with GPS and display on. It has hardware buttons for the important stuff and a touchscreen that still works in the rain with a zero chance of ending up in some freaking "Google now" screen accidentally.