I am not sure I fully understand your issue. But as far as I can tell, once you setup your AirData account, you simply login to your account using the credentials you entered when setting it up (e-mail address + password). You do need to to verify your e-mail address when you set it up the first time but you can do that on a computer. So you certainly don't need to have an email account setup on your iphone or ipad. If you are getting a password error, you are most likely entering an incorrect password. Perhaps reset your password from a computer?