Three steps. Your coach or gym already set you up, so there is nothing to search for.
Open the email
From a coach, the subject is their name, then invited you to train on Marrow. Press Accept invite.
From a gym, it reads Your training moved to Marrow.
Cannot find it? Check your spam folder, or ask your coach to send it again.
Set your password
From a coach: type your email, create a password, and type it again. If your coach charges for training, you then enter your card at their price. That is the only thing you pay.
From a gym: the email takes you to a page where you type your email and press Get me back in. We set up your password with you. Nobody charges you here.
Sign in and train
Download the app from the link in your welcome email, or sign in on the web, with the same email and password.