Unsafe Sex on Safe Days

I have been using this app for 3months. I have sex and have been having sex with the same man for more than a year and a half now. I am no longer on birth control as it made me depressed. We also don't use condoms as neither one of us enjoy the feeling of it. And so I got the app to know when I am ovulating to avoid pregnancy. He has been cumming inside me when there is 3% chance of pregnancy. This method has been working so far and so I would like to know if others use this method and if they have or haven't gotten pregnant because of such?