I just got 2 different OPKs. They are both from walmart. The 1st is Answer ovulation test & the 2nd is clearblue Advanced digital. I used Answer last cycle & it worked very well. I got my peak that matched with my CM then temperature rise. Sadly wasnt able to baby dance enough in that time but this cycle i feel really good about and im hoping with the clearblue i will be able to get a better insight of when i ovulate.