I rarely read the Bible anymore. When I first became a Christian, I was reading it all the time, I couldn't put it down. Eventually life got the better of me and I stopped reading it. A few times since then, I decided to start reading it, and
every single time, it turned out to be a really great experience that I was surprised I put off for so long. And then once again, life would get in the way and I wouldn't read it for a while, thinking it was too boring or pointless.
So great job making an app to make this easier.
For your core features, the "instant verse lookup" and "reading progress that sticks" look very useful.
But KJV audio? I think you'd be competing with the excellent dramatized audio book Truth and Life (RSVCE), which nobody can top.