Next time you fire up the Nook app on your Android tablet, you'll be able to browse HD magazines -- assuming your device has a 1280 x 720 screen. Introduced three months ago on Retina iPads, the feature now jumps to the latest version of the Android app, along with a number of other updates. New magazine titles aside, version 3.4 lets you enlarge book illustrations and adds support for the system's assistive technology for blind and low-vision users. So, you can go wild with screen magnification on Android 4.2 or higher, or listen to the app speak via TalkBack on 4.1. Meanwhile, the Nook app for iOS comes equipped with bug fixes and a better way to organize books in a series. Sure, these updates don't bring a bunch of new major features, but they show that Barnes & Noble isn't likely to axe its mobile apps in the near future like it did the ones for Macs and PCs.