Contraception Science About Us FAQs Healthcare Professionals Login Webshop Digital Contraception IS IT FOR ME? SIGN UP CE marked in Europe Cleared by FDA Does not protect against STIs You must be over 18 years of age Effective Research and clinical studies have shown that Natural Cycles is 93% effective.* * Natural Cycles is 93% effective under typical use, which means that 7 women out of 100 women get pregnant during 1 year of use. Typical use effectiveness takes into account all possible reasons for becoming pregnant while using the app: from having unprotected sex on a red day, to the app wrongly attributing a green day or the chosen method of contraception on a red day having failed. Recognised Natural Cycles is cleared by the US FDA and CE marked in Europe as a medical device for use as a contraceptive. Read more about our regulatory clearances. Natural The “brain” behind the app is a smart algorithm that can accurately determine a woman’s daily fertility. Check out how Natural Cycles works. And so much more At Natural Cycles we are passionate about women’s health and helping women understand more about their bodies and menstrual cycle. Find out if Natural Cycles could be right for you. Independent Expert Fact Sheet on Natural Cycles Read what leading researchers and gynaecologists write about Natural Cycles. These are some of our App Store reviews MountainFi by Simple, accurate and natural 02 January 2018 I find this the best way to track my periods and fertility - it really is very accurate at predicting dates! I have struggled with hormonal birth control in the past, and feel so much better without it. Natural cycles has given me the freedom to just be a woman, and it feels great. Makes a woman's life easier!! by Tansie29 29 January 2018 Easy to use. Great way of tracking everything with great accuracy. Every woman should be using it! Revolutionary by Chloe Schnell 30 January 2018 This app has revolutionized my contraception method. I now feel so in tune with my body and am so happy to be off hormones! Couldn't recommend this app enough. Natural Cycles in the media I love Natural Cycles, I’ve learned so much about my body in the last year. - Sofie Ready to get started? Get the annual subscription today, thermometer included. SIGN UP English UK NATURAL CYCLES How It Works Science Instructions For Use Plan a Pregnancy Pricing COMPANY About Us Careers Press & Media Terms of Use Privacy Policy Use of Cookies Contact EXPLORE Blog Webshop CUSTOMER SUPPORT Cyclerpedia GET THE APP