Put together a rough draft of this prayer book as a PWA (which allows you to install it as an app on mobile). Sadly there is no persistent memory yet (any prayers you make will be erased when you leave the page) but this is enough of a draft that we should be able to bring it to an engineer and get a quote for the amount of work it would take to make a full-fledged version of this https://cb0806151.github.io/react-pwa-test/