Ovulation Tests

Ma
Hey everyone!
So I bought equate brand ovulation tests and they aren't showing any line at all? I've taken 2 so far. They show the one line...not sure what it's called but the second line isn't showing up at all. My app says I ovulated last week but I took one on my "highest peak ovulation day" and another one the next day just to see if maybe the first one was defective. Anyone have any suggestions? Maybe my app is off???