My apps all say something different

Adonis

So I'd like to get the gist of my pregnancy before I go to the doctor. All 3 of my apps have the same information yet differ in response. How do Ik which one is right?

July 16 and 17 is when we did it.

My last period went off July 11th. I didn't find out I was pregnant until 15 days after my period was supposed to come on which was the end on July and it blends into August. A little help please and thank you.