Confused ovulation.

Tiffany
I have 2 apps and they both have different AF dates. So in turn that means 2 different ovulation dates. I don't know how to do this thing I never had to ttc. I don't k NJ on if I'm suppose to do a pregnancy test or not. I'm so confused. Go said my cycle was to start tomorrow I believe and my other app said like the 24th wich is way off . Should I test or not?