Originally Posted by noglider

Not a direct answer, but I use a Garmin Edge 200. I use it like a stopwatch. I hit start when I start and save when I stop. The battery lasts a couple of days on a charge when I use it, and I like that this is independent of my phone's charge. Every few days, I connect it to my computer by USB. This causes the computer to upload my data to the Garmin web site, where it gives me more information than I could hope for.