I asked for some BB advice on this the other day, and have downloaded the free versions of pink pad and period tracker, but it doesn't seem like the free versions allow you to enter CM signs, which is all I'm planning on doing until AF returns after weaning DS2. Does anyone know if you have to buy the full versions to enter CM, or is there another app that allows CM in the free version. I don't mind paying, but want to pick the best one before I buy.