That's great thank you.
I used the android app over a long period of time and perhaps developed a slightly non-standard way of working, maybe because most of my focus was on learning Psalms (i.e. long passages of scripture). I didn't tend to use the flash card approach but always used the line mode of operation, speaking or thinking the passage line by line and revealing them to check as I went along.
When I changed my phone, I found that with the iPhone version it wasn't possible to mark a verse (or at least I couldn't see a way) to say that you had memorized it correctly, without going into the flash cards and that only allowed the verses to be accessed in order. This is different in v6 and has the option to tick a verse without using flash cards. The other problem was that for the show the first letter of each word mode the v5 displays the whole passage whereas the android version did it line by line....this also seems to be aligned with the android app in v6. So from my perspective you can see why I was so pleased to see v6.
The only thing I am missing now is font size adjustment, also line spacing seems unnecessarily wide. I also don't really care for the really thick underlining in a different colour, but maybe I just got so used to the android version...... visually I thought the android version was spot on.
I don't know if you are familiar with a flash card open source program called Anki, but one thing that would be really neat would be to have the repetition algorithm slightly more flexible. With Anki you can say when you get tested whether it was easy, medium, or hard to remember (it also shows how many days it will be scheduled in based on what you answer. The program then schedules the next test depending on that result. There's a bit more to it than that I think, but basically with a hard passage after 100 days you probably don't get it right first time, so with Anki you would say it was hard and it would schedule it in 4 days. It doesn't go back to the spacing that was used when you first learnt the item but adapts depending upon upon how well you did know it. It also means when your practice slips and you forget some verses you get a chance to re-learn it without it getting scheduled for 100+ days time the first time you say you remember it again. So basically eases you back into it more gently.