"This app for iPhones and Android makes it easy to sort through the park's 50-plus landmarks and attractions, double-check distance and hours, and create custom itineraries. You'll find updated park event listings, an interactive map and some two dozen day hikes, that range from easy strolls to extremely strenuous hikes. Hello, Half Dome. We especially liked the app's itinerary function which helps you to plan your day, from the Curry Village ice rink to drinks at the Ahwahnee Hotel. And the postcard option lets you snap a selfie and send the "picture postcard", with its Yosemite border, to a friend."