I enjoy the ease of this app, however I do have 2 key issues that have contributed to the app miscalculating my fertile window. (1) It does not allow me to record when I’ve missed a period. Instead it continuously reminds me to “Log a Period”. Sometimes, I cannot because it hasn’t happened. (2) If two periods are close together it will not allow me to record both saying, “The periods are too close together”. My periods have always been irregular and for this reason I downloaded this app to help me find my most fertile time. However, the inability to record exactly when my periods occur or not has been an issue in figuring this out.