Brilliant and reliable, =D

Ive been using this app since October 2009. I personally think that its the best Free Menstrual Cycle Calendar on here. Even though my periods are quite irregular, it still predicts my "due date" with a precision of 1 or 2 days.
The other apps I used were sometimes a whole two weeks early or late. It caused quite a few unnecessary scares, making me think there was something wrong with me when there wasnt, :S

Richard Owen about Menstrual Calendar FMC, v5.0.6