Confused!!! Trying to figure out ovulation

Ky
Morning guys. So, I noticed a dip in my bbt, and it started to rise yesterday. I got my positive opk yesterday. I have two other apps that are suggesting I ovulated on the 9th, but as I mentioned, I got my positive yesterday. My question is, do I ovulate the day I get a positive, two days after, or have I ovulated already?