AO for your mobile device is not a program. It's a webpage specially sized for small devices. The font is big, so the page doesn't need to be re-sized to click anything, and most of the links AO users would use regularly are all together, on one page. By saving this page as your AO bookmark, frequent users should have less clicking to do to get to where they want within the AO site. The links take you to the correct page within the regular AO website.
There are also links to the CM series, Parents' Review, online guide books so you can look things up while out on nature walks, music, art, poetry, online book searches, and even a few extras - movie review sites, notable CM blogs, Snopes, Find Your Congressmen, news sites, and more.