Wouldn't it be great if while reading a word in your NKJV Study Bible within logos, you double point to or doubleclick a challenging word and voila - it suddenly speaks it aloud (in English) for you on your device?
In my humble opinion, this would be a great basic - "please don't charge me extra" - everyone-will-come-running-to-buy Logos really cares about us common folk basic functionality feature.