We’ve partnered with WHOOP to offer a new way to measure with Natural Cycles. Your WHOOP collects data while you sleep, and the NC° algorithm then analyzes your temperature data to provide personalized fertility insights directly in the app.
WHOOP is not FDA-cleared nor intended to be used as birth control, so it's essential to open the NC° app every day to check your fertility status.
How does WHOOP work with NC°?
- Wear your WHOOP while you sleep
- Your WHOOP syncs to the WHOOP app automatically in the background — there's no need to open it
- Wait for the push notification from your NC° app letting you know your fertility status is ready
- Learn your daily fertility status in the NC° app!
What data is shared between WHOOP and Natural Cycles?
WHOOP will only share sleep data with Natural Cycles (which includes temperature data, heart rate, sleep length, and sleep stages). The Natural Cycles app will not get any cycle data from the WHOOP App.
For data protection reasons, Natural Cycles does not share any sensitive data with WHOOP. The partnership is a one-way integration, meaning any data you log in the Natural Cycles app will not sync with WHOOP. Always refer to the NC° app for a daily fertility status.
However, if you contact our Customer Care Team to troubleshoot a technical issue with the integration, we may securely share relevant data with WHOOP’s team to help resolve the problem. For more details, you can view our Privacy Policy.
Which WHOOP devices work with Natural Cycles?
You must have an active WHOOP One, Peak, or Life membership.
Natural Cycles works with the WHOOP MG and WHOOP 5.0. Older models (WHOOP 4.0) are not compatible with the integration. If your current device isn't compatible, we recommend contacting WHOOP’s Support Team to discuss hardware upgrade options through your membership.
How to connect your WHOOP wearable to the Natural Cycles app
As a new user
- Sign up for Natural Cycles and choose WHOOP as your measuring device.
- Log in to the Natural Cycles app. Follow the in-app instructions to connect your WHOOP account. Enable permissions for heart rate and wrist temperature data when asked.
- Wear your WHOOP device while you sleep each night. It automatically syncs with the WHOOP app, and your overnight temperature data is then shared with the Natural Cycles app, where our algorithm determines your daily fertility status.
As an existing user
You can change your measuring device at any time by going to the app’s top menu > My device > Switch device.
Please note that we recommend only switching measuring devices at the start of a new cycle. Check out the article How to switch measuring devices to learn more.
⚠️ Important: Always check the NC° app for your fertility status. WHOOP syncs your body temperature data with the Natural Cycles app — our algorithm then analyzes this alongside other cycle variables, which may cause your ovulation and temperature data to look different in each app. WHOOP Connect does not use our regulated algorithm and should never be used for birth control.