Which is more accurate to predict ovulation OPK or BBT and cervical mucus?

Question

I have been using tcoyf carting software with OPK. I had a positive with OPK on 02/01/07. With my BBT and cervical mucus tcoyf has predicted my ovulation day as 02/04/07. If I change the setting to OPK before fertility signs my ovulation day is predicted to be 02/02/07. Which date would be more accurate?

Answer 1

I have read on many ttc sites that cm is the best but if that isnt enough than the bbt but I would do all three if you have been trying with no luck