Getting pregnant using this app

Hi all! A friend of mine was ttc & was using the MyDays app to track her period/ovulation. Turns out the ovulation and all other info generated by the app (besides her own period) was wrong, so it delayed her getting pregnant by a looooot! I’m wondering if <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> is legit? And accurate with the info they provide such as ovulation? Any one gotten pregnant with the help of this app?