Comparing apps and BBT

If anything confuses me more it’s this. Only because I’m also on two other fertility/ovulation apps just to see if they all say the same thing.

2/3 do. However, “Ovia” says I’m in my second day of my fertile window just now. This app and the app “OC” say it was the 14th-19th.. which seemed more believable. Pretty big difference… now I’m anxious which to trust. Anyone have any experience with the app Ovia? Here’s what my bbt looks like this week. I also feel like I can’t 100% confirm ovulation though as my CM has stayed the same consistency this entire month. I’m just new to tracking everything and I’m getting frustrated.