I have a iPhone 6s+ and the app works exactly as I expect it to. 31 years sober and have been listening to Joe and Charlie Big Book studies since around 1991. I’ve had cassette tapes, cd’s and now this. So awesome! As I age I have increasing difficulty carrying a Big Book, pens, highlighters, cassettes/cd’s, journal, sticky notes, and etc. Also remembering to get it all. No, I cannot leave it all together, I use it between meetings. I have to drive 25 miles of Kentucky back roads to go to a meetings, so I only make a couple of meetings a week. This has kept me in the Book. Statistics indicate that that’s where the real sober life comes from. THANK YOU CHARLIE AND JOE!