A button to find your trainer is on both the Workout and Nutrition pages.

The Trainers page (found in Settings) will also have a link to find your trainer.

Clicking on any of these will bring you to the trainer lookup page. Your trainer should provide you their SimpleFit trainer id. You can enter their trainer id to find their SimpleFit trainer page.

You can send a request for their trainer services from their trainer page. After they accept your request you will be able to see their contact information, articles they have written for clients, and an option to send check-in photos.