I'd be remiss to not mention a very well-written article in the Denver Catholic Register by Julie Filby: Catholic apps make faith aids mobile.
In the article, Julie does a great job explaining apps and their growing prominence in the lives of the faithful, along with some tips from Mark Hart and I:
Today’s technology offers Catholics many tools for praying, communicating and learning about their faith. One such tool comes in the form of “apps.” [...]
While members of the younger generation used to be the primary users of apps, driving sales and popularity; today all age groups are using them.
This market is still a moving target, and I'm anticipating some great new apps for the faithful—as well as some great updates to old ones—in the coming months. In fact, thanks to the generosity of @kliftonjk, I have two Android devices on which I'm developing an Android version of Catholic News Live!