While versioning for libraries is important, and one could argue about different ways, app versions (ie mobile or desktop) with anything other than whole intege

While versioning for libraries is important, and one could argue about different ways, app versions (ie mobile or desktop) with anything other than whole integers is dumb. Our mobile apps have versions like X.Y.Z and X changes at random times for no reason, and in general in mobile you never see the version anyway, and with auto updating on customers don't even notice.