Not to get too far off subject, but if you want to leave your GPS on and record a track log while riding, there's a little-known (but recently updated) android app from Google called "My Tracks" that has a pretty neat interface and dashboard, and a cool way to replay your ride in Google Earth. Also makes it easy to save and share the data through Google Drive.
I mostly use it for dual sport riding, but it's fun to play back street rides also. It shows relative speed in the Earth map overlay, so you see yourself slowing down, stopping, etc. Your iphone buddies will all be jealous.
George