A reliable period and ovulation calculator app, even when you have irregular periods.




Spot On is described as 'Staying on top of your cycle has never been easier or more fun with Spot On – a birth control and period tracker powered by Planned Parenthood' and is a Period Tracker in the sport & health category. There are more than 25 alternatives to Spot On for a variety of platforms, including Android, iPhone, iPad, Android Tablet and Apple Watch apps. The best Spot On alternative is drip., which is both free and Open Source. Other great apps like Spot On are Mensinator, Menstrudel, Peri and Mooneva.
A reliable period and ovulation calculator app, even when you have irregular periods.



