GuideCast turns smartphones into a wireless tour guide system—no dedicated receivers or mobile data required. A guide speaks into one phone, while participants listen in real time on their own phones over Wi-Fi. • iOS & Android • Tested with 37 simultaneous listeners • Tested up to 50m A 5GHz Wi-Fi router and high-capacity power bank are recommended. An all-in-one battery-powered router can also be used. Built for tours, museums, exhibitions, factory visits, schools, and group events.