Ovulation & Period Tracker is described as 'A reliable period and ovulation calculator app, even when you have irregular periods' and is a Period Tracker in the sport & health category. There are more than 25 alternatives to Ovulation & Period Tracker for a variety of platforms, including Android, iPhone, iPad, Apple Watch and Android Tablet apps. The best Ovulation & Period Tracker alternative is drip., which is both free and Open Source. Other great apps like Ovulation & Period Tracker are Mensinator, Menstrudel, Peri and Tyd.