Keywords: indoor positioning system, indoor navigation app, beacon apps, indoor gps system, open source indoor positioning, indoor location wifi, indoor tracking system, indoor positioning system wifi, ibeacon indoor navigation, indoor location app, meridian maps, meridian mapping, indoor mapping software, ibeacons, ios beacons, eddystone, android apps, ios apps, navigation, sensors, wifi, gps, physical web, internet of things, iot, cloud computing