I don't usually wear a watch, and don't use a smartphone. I also want reasonably accurate temperature information when I'm hiking. For me, the Brunton Nomad V2 has been a good choice. I has time, temperature, altimeter, barometer, chronometer, alarm clock and a limited amount of data storage. I hang the Brunton off the front of my pack so it is easy to consult. I found an altimeter was one of the most useful instruments on the AT because it was often difficult to see any distant landmarks to determine location, and there were many areas with false summits. The altimeter is easily calibrated when passing a point at a known altitude. The barometer is quite useful in providing some storm warning as well.