I wonder how many users you need in a given metro area to get resonable accuracy? Probably not that many, but seems like a tricky problem to boot strap.

Is the point to be an non-google alternative to Google Maps on Android? (On iOS as well of course, but there I guess you have almost no option but to trust Apple, and can use Apple Maps).

Little bit weird that the App Store listing says they are not collecting any data when they have this crowd sourcing of data?

Is this the same General Magic as the one publishing the app? https://www.generalmagic.io

EDIT: Probably not the same: This seems to be the company behind it https://www.magiclane.com/web/about/ if you sleuth round a bit. Then the pricing model of free makes more sense at least.

EDIT2: Or maybe not at all, the street addresses don't match up. Enough playing internet detective for this coffee break, back to work.