Integration with Whoop
The last idea to link Whoop was a long time ago. Since then, whoop grew immensely and all the top athletes from the NBA to Football in Europe are using it. It's a great tool. Integration with Trainerize would be amazing for clients and for trainers, who could have access to much more data through whoops features.
Furthermore, Trainerize would for sure get a larger user base and new clients, and the other way around would be true. It's a double win-win situation.