iPhone, iPad, iPod Touch, OS X. One library. Your choice. QCObjective-C handles your threading for you to keep your apps responsive and quick.
Most Android apps run all of their logic in the main UI thread. This causes the UI to be unresponsive. QCJava will handle all of the threading for you. Your UI will remain responsive.
Why use one application design for your Android app, another for your Java EE app, and a third for a Java SE app? Use the QCNative library in them all and ship a better product faster.