Send events from web to native and from native to web in a simple JSON format.
Cobalt is a web and native framework that enables you to build mobile apps that can mix web and native technologies.
Cobalt is faster than PhoneGap because it uses native navigation and some native components. Cobalt is cheaper than trigger.io because it's free! Cobalt is easier to learn than Appcelerator.
Cobalt is an open source and free solution. That means you can use it for commercial applications or free applications.