What app version are you using?
Make sure to log in with the same email you used for registration.
If you can't remember which account you used to register, please type in the email address you are using to receive email alerts from Seeking Alpha with.
If you forgot your password you can always recover it by entering your email address and on the password screen tap on “Forgot Password”. You will get an email from Seeking Alpha with a One-Click Setup link. This will log you back in.