We've already covered how to create a CrowdLink Profile (on the web) after registering for an event here. This article covers how to create a profile from inside the CrowdLink app.
1) Download CrowdLink from the App Store or Google Play store.
2) Click on Don't have an account? Sign up now. at the bottom of the screen.
3) Fill out the form with your information. The email address you use to sign up must be the same one you use to register for events, if they're different you won't be able to see your events in the app.
4) Click the Sign Up button when you've completed the form. Once you've signed up, a confirmation email will be sent to you and you'll be taken to the confirmation screen below to log in.