Really annoyed with app!!!

I am so annoyed with this app cause I really can not get past the end date of my period when I am entering in the CORRECT date(S). I have sent an email to the email that was/is provided and that I have seen to contact them and was NO help at all. They told me that if I was able to update the app go and do so since it may be an older version and there was NO way I could update it since it was not showing that it needed to be updated at all, also asked what kind of device I was using and after I sent my email I never heard anythin back from the people again, tried emailing them again but still no reply back. I would really like to use this app but cant if its saying that STUPID error message all the time when I try and set it up to use it.

Jamie_2009 about Cycle Free (Period Tracker)