No. The connection over the coaching platform between a coach and an athlete is free of charge. Coaches and athletes pay for their own license subscription. No additional fee has to be paid by the coach or the athlete for the use of the coaching platform.
Data sharing between athletes and coaches is only possible if they both have a iQO2 license and accept the request to share data with each other. The request is sended by the coach or athlete, but the connection will appear on hold until the request is accepted.