Confused about conception date? Help?

KR

My app says my conception date is June 24th... but we didn’t even have sex until July 2nd and July 6th.

I got a positive test on July 15th...

My last period was June 10th and my average cycle is 31-35 days (irregular)

So, I’m trying to figure out what the conception date is when we couldn’t have conceived until after July 2nd when the egg would have fertilized, right?