Track your cycle, know your fertile days, and understand when pregnancy is (and isn’t) possible. In under 60 seconds per day.
Find out which device is right for you with a quick quiz.
Your reproductive future.
In your hands.
500,000+ women trust our devices with natural family planning
★★★★★
One year ago I made one of the best decisions of my life. I believe every woman should have the right to choose what method is best for her lifestyle & body, and the fertility awareness method is hands down the best one for me. I am forever grateful for this method. I have a whole new level of love and trust for my body.
★★★★★
An incredible tool to support your family planning goals, whatever they may be, backed by science. It’s just a small commitment (1-2 min) every morning and the insights are life changing. Even more, understanding your chart of daily temperatures gives you a window into your overall health, beyond cycle tracking.
★★★★★
This is the best thing that’s ever happened to my relationship. Before I tried various hormonal methods and they messed me up super hard, especially with my PCOS.
Never looked back since, this is well worth the price. Would totally recommend it.
Find your fertile days
Backed by 40 years of science.
After analyzing data from over 10 million cycles, researchers found Valley devices identify fertile and non-fertile days with 99.4% accuracy.
Your data is yours.
And yours alone.
Your privacy is extremely important to us. That’s why your cycle tracking data is only stored on your device and never shared with anyone – not even us.
Which ovulation tracker is right for me?
Answer a few quick questions to get a personalized recommendation.
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Meet the experts
Read up on periods, basal body temperature, and fertility.