Ok so this is this months calendar I’ve been using my opks ( yes I know not at the same time everyday but I get busy & sidetracked)

I’ve had a few peak results I imputes yesterday and it changed my ovulation date to today BUT when I imputes today’s opk in my other app it’s changed my ovulation to tomorrow? How will I know if it’s today or tomorrow? Do you ovulate while it’s still peak or after? Sorry for so many questions I’m just trying to time it right as I may have missed it last month😩🤞🏽