Clue Period Tracker & Calendar is described as 'Are your moods related to your menstrual cycle? Just track in your period diary what you’d like to know more about, and Clue takes care of the rest. The period tracker you’ve been waiting for: Now You Know' and is a Period Tracker in the sport & health category. There are more than 25 alternatives to Clue Period Tracker & Calendar for a variety of platforms, including Android, iPhone, iPad, Android Tablet and Apple Watch apps. The best Clue Period Tracker & Calendar alternative is drip., which is both free and Open Source. Other great apps like Clue Period Tracker & Calendar are Mensinator, Menstrudel, Tyd and Period Tracker.