Clue Tracking is designed for those who don’t experience menstrual bleeding. Unlike Clue Period Tracking, in which each cycle begins on the first day you track period flow, Clue Tracking allows you to start a custom cycle on your own terms, without the need for period tracking.
Clue Period Tracking uses a science-based predictive algorithm specifically for the hormonal menstrual cycle. On the other hand, in Clue Tracking it’s up to you to determine what type of cycle you want to track.