Ovulation app question

Hannah • 5 beautiful children 14 angel babies pregnant and shooting for #6: the last one

So I use 3 different apps to track ovulation. Fertility friend, ovia and glow. FF says I ovulated yesterday ovia says I'm ovulating today and glow says I'm ovulating in 2 days. Which one would you believe? I didn't track with OPK or temp this month so now I'm blind on this. I am considering getting a couple of the dollar tests just to see if I get a positive by the end of my fertile week. What do y'all think?

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