I don't own a smart phone or GPS device and have no desire to spend money on them. Bicycle time is time for me to unplug and have fun. Most of my weekday riding is between work and home, and I'm surrounded by computers in both places. I don't need one on my bicycle, too. When I go weekend MTBing on local trails, gravel, and single-track, it's usually with a friend or two. Since everyone but me has bike computers and/or smart phones these days, somebody is always happy to tell me how many miles when we're done.

I tend to think of cycling more by time spent than distance ridden, such as two hours on the trails, an hour on the road, a 30 minute commute, etc. I do carry my cheap flip-phone in my pocket or in the under-seat bag, adn that eliminates the need for a wristwatch. Of course I can call for help if needed as well, which fortunately I've never had to do.

Simple is good.