Confused!

Rachel

Hi I am new to the ovulation tests and I am a little confused. I took my first one on day 5 which was the day my period ended and there was a faint second line which I know is negative, it was the same on day 6 but then day 7 the line seemed to be getting lighter and then today when I took one there is no second line at all is this normal? According to my app I am due to ovulate the 3rd February but on my other app it says ovulation day the 1st February