Confident. Scientific.
Not pink.


Track your cycle.
It's beautifully complex.

Clue is designed to make tracking your fertility accurate, fast and friendly. Keep track of your monthly cycle by entering data about your period, pain, mood, fluid, sexual activity and personal notes.

Get to know your
body. It's not a clock.

Glance at your phone to know when your next period or PMS is coming. Clue uses an algorithm to calculate and predict your own unique cycle. The more you use Clue, the more accurate it gets. Clue includes educational material about the menstrual cycle, answering questions like: Is my cycle normal? When can I get pregnant? What is PMS?

Lead your life.
It's your fertility.

Clue is made for you Whether you want to get pregnant, be prepared for your next period or understand your mood swings. Make the right decision every day.

Available for iPhone,
and Android