My guess is that if your are experiencing bloating and cramping and your significant other is cowering under the bed, you are probably 'on' your cycle. I'm guessing no one needs a piece of software to tell you so.
All you men are hysterical! I love it.
Do you really not comprehend that we could have medical use for an easy way to track statistics? That for some female geeks we would prefer to have it on our blessed BB instead of outlook or a paper calendar?
I think people can use these apps to time when they are most fertile to aid conception... Or to try to avoid fertile times for the opposite reasons......
We have three similar free apps on phoload.com, so there must be a market!