I'm wondering if anything like this exists. I prefer to use a GPS to record my trips instead of a cycling computer because I can also visualize where I've been, not only the mileage.
I currently use an eTrex for this, but it's a bit cumbersome for day cycles: it's big enough so it's annoying to keep in the back of the jersey (I already have the phone, some cards and car keys there). With some pushing in the saddle bag I can keep it there, but it's hard to zip the bag closed (there's already a multitool, patch kit and other small stuff in it).
Does anyone know of a GPS receiver that can record the track for later download but have little other functionality so it's smaller than an eTrex? I find the iPhone useless for such recordings because of the low battery life; some of the apps I tried were also suspending the recording when the phone was auto-locking.
I kind of doubt anyone is making such simple receivers, but you never know.