Different Apps/Different Ovulation Predictions

Hi All,

I’m new here and my husband and I are in our third month TTC. This is my first month using this app as I used another one before and it seemed like my ovulation date according to that app was wrong. Currently have 4 apps including Glo and I’m getting different ovulation dates.

Apps are saying my ovulation will either be Oct. 10, 11 or 12th. My Glo calendar is below and saying Oct. 11 is my ovulation date. Not too sure what to go by and when to do the BD with all these different ovulation dates from various apps. Any help would be great! Thank you!!