is Fertility Friend reliable?

Erin • Mommy to 2 boys. 💙💙 trying for #3.
So my temps have been absolutely crazy. I'm doing them every morning at the same time, after a good solid block of sleep. This is my first cycle with clomid and I'm on CD 29. My CM has been heavy in volume since day 14 and my cervix was high, firm and open last week. I thought I had a positive OPK on CD18-19. But then I think I got my actual positive on CD24-25? I'm wondering if Fertility Friend is accurate. Has anyone else found it to be somewhat reliable in detecting ovulation? I'm just really confused as to whether I've even actually ovulated or not. 🤷🏽‍♀️