I have The Bike app for my iPhone and it’s an ungodly piece of crap. It’s supposed to use the phone’s built-in GPS to operate like a conventional bike computer, but instead it turns your ride into a test of your patience in the face of futility. There are some other iPhone apps like X-GPS that work with bikes for plotting routes and tracking speeds. This guy made a simple hack to keep the rain off his iPhone while pedaling around town. Don’t also rely on it to prevent phone theft when you lock your bike outside Dunn Bros.