Can't even log in or create an account – Food Monster - Vegan Recipes Review

I downloaded this app as I have started a vegan diet and saw this app recommended on a nutritional site. Read through reviews good and bad, and thought I'd give it a try, great reviews from users who have been successful, bad reviews from users about glitches and crashes. So far I can't even log in to an account. Tried to access it by Facebook login, it tells me that an account already exists with that email. Which I know doesn't. Tried to create a new account using a different email address, again another error, this time something about the data format being incorrect. I would be one of the users to actually download the app and pay a nominal fee for more access, too bad I can't get access. I'm using iPhone. Maybe I need an update or something. I'll try that and then see if I can change my rating. So far, a big disappoint.
Review by sistasallysue on Food Monster - Vegan Recipes.