Clue

Clue helps over 10 million people track their menstrual cycle and symptoms with precision, so they can uncover patterns, anticipate changes, and take charge of their reproductive health.

Smarter period tracking.

With Clue, you can follow every stage of your cycle in detail, plan up to a year ahead, and log over 200 experiences with unlimited custom tags. Pair Clue with a compatible Polar watch to seamlessly track nightly skin temperature trends and unlock even more precise insights.

Deeper insights.

Unlock personalized insights and clear data visualizations that transform your cycle into a powerful tool, giving you a clear view of your overall health, fertility, and wellbeing.

Advanced predictions.

From daily fertile day predictions to ovulation test logging and 200+ symptom options, Clue Plus makes fertility tracking simple and precise. Share your cycle with your partner and rely on CE marked and clinically validated algorithms you can trust.

Polar Bonus Pack

3-Month Free Clue Plus Membership.

Clue is the go-to app for understanding your menstrual cycle — from period and symptom tracking to science-based insights and personalized predictions. Whatever stage you’re in, Clue helps you stay in tune with your body.

Compatible Watches

Polar Grit X2

Buy

Polar Vantage M3

Buy

Polar Grit X2 Pro Titan

Buy

Polar Grit X2 Pro

Buy

Polar Vantage V3

Buy

Get Started

...in just 3 steps.

Choose any compatible product from polar.com
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