good app from experienced NFP couple

My wife and I have been using natural methods to regulate our family size for 18 years. I really like this app, its not perfect but pretty close. I have one suggestion, instead of calling the green days of the month "safe" could they be called "infertile." Using "safe" implies that couples are using this method/app to avoid pregnancy when so many are using it to achieve pregnancy. Using "infertile" makes the app more inclusive of all users. Thanks for your consideration and thanks for the app, yes its better than paper charts.

Matt & Rachel W. about Woman Calendar, v1.6.2