Open up your ARIONCOACH app. When you open up the app, the following two options will be available: 'welcome back', in case you already have an account, or 'create account' at the top.
The next step is to create your profile. You can add a profile picture, enter your first and last name and select your gender. By clicking on next, you will enter the last phase of creating your account. This step allows you to fill in your birth date, height and weight. Once you are finished, click on done and you are ready to go.