Fertile Window confusion?

Bria

Hi ladies! I just need a smidge of advice. I’ve been using OvuSense for the past 2 cycles and I noticed that last cycle (cycle 2) it was super accurate about my O date. But before I even got ovulation confirmed Premom was spot on.

Now fast forward to now. Premom has moved my fertile window up from what OvuSense had set (10/15).

We have our donor stopping by tonight and Wednesday. Do you think I’m on the right track here?