Lip balm and a candy bar, bottled water and ear plugs—these are all Treefort Music Fest essentials, but there is no item more central to enjoying the festival than a smartphone. It's the primary tool for making plans with friends, sharing media and keeping up with festival news. In years past, Treefort handed out maps complete with lineups to ticket-holders; the app was optional. Now, it's the other way around: The best and most efficient way to navigate the party is with the app. This year's update is streamlined and more user-friendly. It has the same schedule feature for keeping track of favorite acts that has been a function of the app for years, but it's easier than ever to share schedules with friends. There are loads of other features, from exploring related hashtags with ease to tuning in to Radio Boise and getting the latest on individual forts and volunteer opportunities. Don't leave home without it.The app is free and available on Google Play and the iTunes App Store.