This is the event app for Keystone Symposia's conference on "Optogenetics", taking place in Denver, Colorado, March 12-16, 2015, and organized by Edward S. Boyden, Klaus M. Hahn and Chandra Tucker. Our mobile app allows you to: • View the full text of poster and speaker abstracts• Send messages to other attendees• View the program, “favorite” sessions you don't want to miss and create a personalized meeting agenda• Receive on-site announcements from our staff• Take session-specific notes and email them to yourself• Access information about local-area activities, discounts and services.For more information about this conference, you can also visit Keystone Symposia’s website at http://www.keystonesymposia.org/15C5