Four years ago, we explored developing a school app as a signed up member of the Apple Developer Program, but submitting to iTunes was a very involved process.
We used a free service to design our app initially - Conduit (now Como) - but it offered only a limited numbers of users. At present, the app is only available in a web browser but the links do work if you click on the buttons - Map, Twitter, More etc.
Parent Claire Wheeler suggested looking into this again and we would warmly welcome parental support from anyone who has expertise in this field. Please contact firstname.lastname@example.org