Clue | 25,956 followers on LinkedIn. The #1 women-led period and cycle tracker loved by over 100 million women and people with cycles worldwide. | Clue is the #1 doctor-recommended period & cycle tracking app available on iOS, Android, and Apple Watch. Across the globe, more than 10 million active users rely on Clue to help understand their bodies better and keep their data safe and private. Clue’s mission is for women and people with cycles to make good choices for themselves, and live full lives not in spite of their biology, but in tune with it.