My favorite!
Ive had this app since 2013 and I got pregnant on my exact ovulation day in 2014! I now use it to know what days Im fertile to avoid pregnancy until my husband and I are ready.
If you are not regular, give it a few months of tracking and it will pick up on your cycle and adjust.
ChristopherRileys.com about
Period Tracker by GP Apps, v9.3.5