The app contains thousands of high-resolution images from NASA IOTD, APOD, and NASAImages.org, exclusive videos, breaking mission information, and even information about shuttle launches.
You'll also be able to enjoy streaming NASA TV at any time, and getting instant updates from NASA's official Twitter feed.
You'll have access to maps of all NASA centers to see which is closest to your location.
NASA App is a great app for anyone interested in space and space-faring missions. Both the quality and quantity of content are really impressive.