A few months back, I started doing most of my Bible and Catechism reading on my computer. I find that it’s especially helpful while traveling, but even at home, I get great benefit from the search capabilities and other features.
I’ve been using Accordance, a Macintosh program. (It supposedly also works on Windows with an emulator program, but I haven’t tried that.) I like how this company offers a Catholic Collection of products, with the Catechism, the Order of Mass, the Documents of Vatican Councils I and II, etc. Accordance is also endorsed by a well regarded Catholic writer Jeff Cavins.
They even have a try-before-you-buy program, so check it out.