Like Pilot DAR I've been around aviation for a long time and frankly can't see your problem. I administer the maintenance program for my aircraft. I have sixteen log books with the latter ones backed up with an electronic product. I use SkyDemon for flight planning (which now has its own logbook) and am quite happy having all those items administered separately. My licences are stored on PC and on a cloud for remote access.
I doubt you'd succeed in creating an app that caters for online booking when so many schools, such as yours it would seem, prefer to use the phone.
Good luck in your efforts anyway.