An oral appliance constructed with a housing that encloses a recorder and a transceiver. The oral appliance responds to commands received via the transceiver. When so directed, the oral appliance uses one or more sensors alone or in combination to record measurements at periodic intervals. When communicatively coupled to a suitably configured communication device, the oral appliance receives commands that direct the oral appliance to transmit an identifier, the recorded data, or both the identifier and the data. The transmitted data can be used to determine whether the user of the oral appliance has complied with a recommended usage schedule.