When you've finished downloading the app, tap the QuizUp icon on your home screen to open it.
Please keep in mind that you can not change the way you link your account, so choose wisely!
If you sign up with email, please make sure you enter your email address correctly and you choose an email address that only you can access. If you forget your password you'll need access to your email to get back into your QuizUp account.
If you sign up with Facebook/Google+, please keep in mind that deleting your Facebook/Google+ account will also delete your QuizUp account.