CycleGuide is a period and hormone tracking app that goes beyond just predicting your next period. It explains what is happening inside your body during each phase of your cycle — why your energy dips, why your mood shifts, why some weeks feel effortless and others feel impossible. Log your period, symptoms and mood each day. CycleGuide predicts your next cycle, shows your fertile window and delivers a personalised AI coaching tip based on where you are in your cycle right now.