I originally started using Duolingo on my Android phone and everything worked great. I recently got an iPhone and and immediately downloaded Duolingo. After logging into my account, I was disappointed to see that none of my progress showed up.
Is there anything I can do?
They are compatible, so you should have no problem. Are you sure the username is correct? For example, did you sign in with Facebook in one and not the other?
No, I didn't use facebook, but I just double checked the email addresses and apparently I previously registered under two different email addresses. I don't remember doing that! Thanks for the help :)