If you're looking for flexibility in a Angular-driven framework for building mobile apps, you may want to check out Famo.us/Angular (github.com/Famous/famous-an

If you're looking for flexibility in a Angular-driven framework for building mobile apps, you may want to check out Famo.us/Angular (github.com/Famous/famous-angular). The framework is still relatively young, but at 0.1.0 and nearly 5 months of development, it's gaining some traction. (disclosure: I'm a contributor) The cool thing about Famo.us is that you can express animations imperatively, and the framework enables those animations to be GPU accelerated (i.e. "buttery smooth".) So imagine if jQuery animations were performant. Add AngularJS to the mix and you get a pretty powerful mobile app framework. The flipside with regard to Ionic is that there are (as of yet) fewer full-blown UI widgets like Ionic provides [though there are some nice ones like LightBox in the Famo.us core], so though you aren't boxed in, you also don't get quite the same "one directive and done" simplicity that you get when you're working with-the-grain with Ionic.