Ovulation help

Sam • •Married💍• Momma to 4 ( including twins)• 5 losses👼🏻•Aps•

So if I take a digital clear blue and it shows up solid smiley and it says I’ll ovulate 24-36 hours just by the book. Why does my app log my ovulation the day I put that I took a test and got a solid smiley shouldn’t it put it for the next day as my peak ovulation? Then my days could be off for testing and my DPO?