Definitely a pwa, need to start this off as simple as possible. As to content, I wonder if we could start simple, as just a prayer book (which also seems to be what you're is doing alrready). There's a lot of apps out there already, which is good, because we can just borrow from what works well. I can already think of the next evolution of it, which would be a build your own prayer book: pick the prayers you want from a list, and those are on the home screen for you (if we do start out simple, this isn't a problem, but once we add more prayers, this will become a necessity, if you've ever tried to scroll through the "Prayers" section of iBreviary, being able to populate your own personal prayer section is a good thing). A further evolution would be the ability to add push notifications to prayers, to remind you to pray certain prayers at certain times of the day. This can also set the stage for a social aspect: we'll need accounts to make individualized prayer books, and at that point it would be cool if users could share their prayer books, or you could borrow the prayer book from someone you respect and use that.