Cant access the app

Id love to try this app, since I really enjoy the MyNetDiary Pro app and would like to sync them, but I cant access it. I downloaded it but it keeps telling me theres an error with my username or password, when Ive verified these 100% on the other app and on the online version. I changed my password to make sure, and waited overnight to sign in to this app again (after multiple failed attempts), but still nothing. Please fix!

mlebdv about MyNetDiary GPS Tracker - Running, Walking, Cycling for Weight Loss