Regarding present version:
1. Latest version made the app a little slower. Especially text in the Bible appears slowly after switching the chapter.
2. I dislike new full screen option. Or, rather, I preferred previous option, when I could hide all bars (by double tapping) for good. Now they hide and show on and on anytime I scroll just a little bit and I cant hide them for good.
Drombik about JW Library, v1.7.1