Ovusense vs Fertility Friend ... which day??

Jessica

I started using Ovusense this cycle. I enter the temp data from it into FF each morning along with my OPKs & such. FF put my cover line at day 13 (Monday), I felt O pains Tuesday, and Ovusense makes it look like I ovulated yesterday (day 15).

Which do you think is more accurate?

BTW .. I am loving the ease of Ovusense. I have a son who wakes up randomly at night and I feel like I’m getting a more accurate BBT than traditional temping!