Ovulation Test Question

So my husband and I have finally start actively TTC and I've been tracking my ovulation through this app and I also take ovulation tests just to be sure it lines up. I've taken a test the same time every time on Tuesday, Wednesday, Thursday and today(Friday) and it still says that my chances are high because it's a flashing smiley face. But I haven't gotten the solid smiley face to indicate peak ovulation. 
My question is do people ovulate that long? Or could the tests be defective?