@regordane Yes, GeoJPG works offline on iOS and Android. If you can display landmarks in your area with the GISsurfer web map (one of my other projects) then you can make your own custom map that will include those landmarks and view that map offline with GeoJPG.
@mappingsupport
I'm still not clear from that technoblurb whether or how geo-location works when offline. I'm also sure that the sort of person who gets separated on an office team-building trip is likely to be the sort of person who wouldn't be able to use this.