The cycle tracking feature in the health app was fairly basic when it was first launched. It didn't do much other than allow you to log your period, but you couldn't log factors like birth control or pregnancies. The company recently added features that can retroactively identify when a person ovulates.

It is understandable if you are not willing to give up your fingerprints for this purpose in the post-Roe era. You can easily remove those features if that is the case.

Apple uses temperature data to estimate ovulation. The only Apple Watch that tracks that information is the Apple Watch Series 8 or Ultra. It's possible to manually input your body temperature. The Health app won't be able to collect this data if you disabling wrist temperature tracking.

To disable wrist temperature

You can open the health app on your phone. The options are on the right of the cycle log. Go to watch data and turn off use wrist temperature If you don't want to share any data, you can turn off the use heart rate. If you head to the settings, you can use wrist temperature and heart rate.

Apple Watch on a wrist showing a screen that lets a user log a period
Wrist temperature data collection can be disabled from the Apple Watch Series 8 or Ultra too.
Photo by Amelia Holowaty Krales / The Verge

To disable fertility tracking

All fertility tracking features within the Health app can beDisabling the wrist temperature features doesn't mean disabling all fertility tracking features within the Health app Your data won't be used to make window predictions. The Health app can still use your data to predict your fertile window, but it won't be as accurate.

Fertility tracking should be completely disabled.

You can open the health app and navigate to options. You can scroll down to Fertility Tracking and check the Fertility Window estimates.

Apple has added a new feature called cycle Deviation Detection. Users are notifies if they have irregular, intermittent, or long periods. If it discovers persistent spotting, it will let you know.

To turn off cycle deviation detection, open the health app and navigate to cycle tracking options. You can see Cycle Deviation Detection under the Period Tracking headers. Irregular Periods, Infrequent Periods, Prolonged Periods, and Persistent Spotting should be shown in four different ways. All these must be turned off.

A note on privacy

Privacy protections for period apps are not the best. Here is how Apple approaches the data.

When your phone is locked with a passcode, Touch ID, or Face ID, all of your health and fitness data in the Health app, other than your Medical ID, is encrypted. Any health data synced to iCloud is encrypted both in transit and on our servers. And if you have a recent version of watchOS and iOS with the default two-factor authentication and a passcode, your health and activity data will be stored in a way that Apple can’t read it.

This doesn't cover what happens if you share this data with third-party apps. It doesn't guarantee that Apple won't share data The only way to be 100 percent sure is not to go digital.

If you want to learn more about period app privacy, you can use the related links box above.