I got pregnant with both my daughters using it. My one daughter is 15 months and I'm 13 weeks with my second daughter. You're more like to get pregnant during your "fertile window" that on ovulation day from my experience. I used the app called Eve, loved it!
A lot of recommendations for the Ovia fertility app. But sometimes "not trying" yields favorable results. When it becomes a chore it takes the fun out of it.