CourseSmart recently made reading e-textbooks more accessible with the unveiling of the new app that can be used on the Kindle Fire, iPad, and Android devices. The free app provides customers with a catalog of more than 20,000 e-textbooks created by CourseSmart, as well as other digital course materials and users will need to pay for access to the e-materials. To use the app you need Google Chrome, Safari, or Amazon Silk on Android 3.0 and higher, Kindle Fire, or iPad devices. Compatibility with other Android devices, iPhone, and iPod Touch is in the works, according to CourseSmart.