So I was wondering if anyone else has this problem. I use two other apps to calculate my cycle and fertile window. And every website or app I go on says something different and I type in all the same data. Does anyone else have this problem? It's very hard for me to keep track of my fertile window since my periods are so irregular. And I like sex. But not every day to get my fertile window right. I've been trying for over a year now. Ugh.