App showing incorrect ovulation prediction

Hello all,

I’m new to this app. The app predicts I will ovulate in 10 days , however when I took the clear blue digital test it said I was ovulating 2 days ago. And I updated that info to my log. Why does the app not update its own prediction based on that info ? And still keep showing I will ovulate in 10 days ?

Just makes me think of the app is any good for me then ?