I am a basic Greek reader, and have a Reading plan set up to read through the NA28 each year. Each day I will need to use Lookup two or three times either to parse a word or to find its meaning. On the Logos iPad app this takes time (up to 15s) when online and doesn't work at all when offline. It was only today when experimenting with A-company's iPad app that I realised how much smoother this could be. When I look up a word there, the parsing and a basic gloss comes up instantly. This actually transformed my reading experience, making it so much smoother and easier.
Having said that, I then wasted half an hour trying to work out how to set up a Reading Plan in A-company's desktop and mobile apps!
I know there are a series of technical challenges in the Logos architecture over making some of these things available offline, but I have to say I'll probably be doing my Greek reading elsewhere until this feature comes to the Logos mobile app.