contagt is a combined indoor/outdoor navigation solution. In outdoor areas, contagt determines the user’s position via GPS satellite signal. In indoor areas, the proprietary CPS (“contagt Positioning System”) takes over, combining different positioning technologies. Next to the sensors of the smartphone and location markers (QR and/or NFC tags), CPS uses radio signals from WiFi routers and Bluetooth beacons for position calculation. As a result, contagt allows seamless navigation from outdoor to indoor areas with an accuracy of up to 1-2 m.