Outdated method.

This method of observing your fertility, called the rythm method, is really outdated, over 80 years old, and very ineffective!

Please look for an app that supports modern family planning methods, making use of observations, e.g.:
- body temperature (precise to 0.05 degree C, not just 0.1)
- cervix state and cervical mucus
- possibly other symptoms.

Maciej :-) about Ovulation Calculator & Fertility Tracker, v1.4