Cross-OS platforms for mobile development on the whole are not yet a completely perfect, have-your-cake-and-eat-it-too solution, but many of them offer an excellent alternative to ignoring one mobile OS in favor of another or, perhaps worse, burning serious resources to develop for two or three platforms at once.
Sencha Touch, a high-performance HTML5 mobile application framework, is the cornerstone of the Sencha HTML5 platform. Built for enabling world-class user experiences, Sencha Touch is the only framework that enables developers to build fast and impressive apps that work on iOS, Android, BlackBerry, Kindle Fire, and more.
ChocolateChip-UI has been completely rewritten to abstract out the differences between ChocolateChip.js, jQuery and Zepto. There is now only one version of ChocolateChip-UI. It is exactly the same for all three libraries. This means you get the exact same feature set, functionality and behavior, regardless of the library you use. ChocolateChip-UI has been updated to work with iOS versions 5 and 6, and Android versions Icecream Sandwich and Jelly Bean.