which app to go by

But I have a question. I tracked my ovulation date with opks and cm/cp as well as symptoms. So I'm pretty positive that I ovulated on cd20/21. Currently I am on cd27. When I logged all of my fertility window stuff Glow changed my af due date to the 8th. But ovia kept af due to arrive on the 4th. If I ovulated 6/7 days ago when would you think I Gould expect af? This is my first month off of bc, I took 8 months of bc as well as metformin to regulate my cycles since I have PCOS. What do y'all think? I'm new to all of this ttc stuff. My daughter who is 7 was a pretty big surprise.