Used it when ttc nr 1 and it was correct. Have been using it for 2 years again and on the dot. Also ttc nr 2 now and using it

It depends how regular your cycles are and how consistently you chart. Mine is usually off by a day or two but I have irregular cycles.

Mines accurate but ive been charting for 9 months. It was accurate when we were ttc our first as well.

Mine is always accurate but I’ve been using it for months now so I think it has got used to my cycles

Its close but not accurate but I am a weirdo and have a different luteal phase every month ?