As cell phones get become more like electronic multitools, you’ll find more serious uses for them on hiking and climbing trips. People who are still analog holdouts will tell you that you can’t depend on electronic devices in the wild, and that you need paper backups of topo maps and other important documentation. Absolutely! But experienced people also bring phones to take advantage of the lightning fast access to mapping, weather, and other useful data, even where there is no cell service. Here are a few apps to help you get the most out of your Apple or Android device.