Trying to get pregnant!

My fiance and I have been trying to get pregnant and have been struggling. I use <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period apps</a> to calculate my ovulation day so we know when to have sex and after but I'm not sure if the app fertile days are actually the days I'm fertile. Maybe it could be right but I downloaded <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> and it seems like a great app from the reviews and post....has anyone gotten pregnant and their ovulation day was accurate from the <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> app?