This is the Companion App for ThruDoor. Use of this app is restricted to certified, vetted, and trained companions, and it facilitates the matching of approved companions based on their training, certifications, location, and availability with users so that the companion may provide the requested navigation and/or other mobility assistance to the user during the pedestrian part of their journey. Whether indoor or outdoor, the app helps companions find the user through location services, wayfinding, and direct audio and visual communication.