My fertility specialist is starting me on medicated cycles and wants me to use a digital OPK (I have only use cheapie test strips before).

She told me I can just use the regular digital, that the advance is pointless. It does the same thing as the regular, but costs more money. Like I said, I have never used these, but it was my understanding that the advance kind of gives you a heads up so you can BD earlier in your fertile window or plan better for ovulation, whereas the regular just tells you the day before or the day of ovulation.

Are the advance worth it? They are only like $3 more, so I'm not concerned about the price. I want to buy whichever will be more beneficial for us