Duck Duck Moose has joined Khan Academy, a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We'd like to thank you for supporting us. Without you, we wouldn't have attained this exciting next stage of growth. Now that we're part of Khan Academy, all Duck Duck Moose apps are available for free to anyone, anywhere. Download any apps you might be missing, share our news and learn more about getting involved at www.duckduckmoose.com/about.