Most free smartphone menstrual cycle tracking apps for patient use are inaccurate. Few cite medical literature or health professional involvement. We list accurate apps to aid health care providers in understanding the key components they can use to evaluate and recommend apps for patients.

(Abstracted from Obstet Gynecol 2016;127:1153–1160) Tracking of menstrual cycles is a form of self-monitoring that promotes patient empowerment and informed decision making. Tracking is useful in women for self-understanding and achieving fertility goals.