This New App is Really Sexist

The latest app discovery is not a good one, an app, Frederick is “an honest menstrual cycle navigator, for men”.

So pretty much a guy can type in the day their girlfriend starts her period, and the app works out roughly what her cycle is. Since they'll then know the dates of her period they can then avoid her, or be sensitive about what they say/do during this time. 

It appears that this super sexist app is only in the UK, so that's something. It's not even free, so if you download you're not only short a girlfriend, you're also short of a couple of dollars.

Source