App won't work – Offers.com Coupon Codes & Deals Review

I get the emails and think the website works fine via web browser, but the app will not let me log in. I've tried to use Facebook to create and account and log in several times but it failed. I can't create an account now because it says I already have one, but then it won't let me log in with it. I've deleted and reloaded the app and it still won't work.
Review by Shanana Nanagins on Offers.com Coupon Codes & Deals.