No, you cannot use Natural Cycles while you are using hormonal birth control.
In general, the hormones in hormonal birth control affect your temperature. As Natural Cycles uses body temperature to calculate your fertility status, the app cannot be used together with any hormones that impact your temperature.
Additionally, hormonal birth control generally works by stopping ovulation, which means that you don’t have an actual menstrual cycle while using hormones. The bleeding you may experience while on hormonal birth control is not considered a period; it is a type of spotting called withdrawal bleeding.
If you log that you are still using hormonal birth control when setting up your account, you will be placed in the Transition Mode. You will not be able to enter any data during this time (it will not be saved), and you will not be able to connect your measuring device (Oura Ring, Apple Watch, or Bluetooth thermometer).
Once you’re off hormones and ready to start, you can exit the Transition Mode by clicking on “Start today.” You will then be able to connect your measuring device to the app.
If you selected the wrong measuring device when first setting up your account, please contact our Customer Care team via this link. We can help you change the device on your account so you can seamlessly connect after exiting Transition Mode.
We also write more about when and how to start using Natural Cycles after hormonal birth control, here: When can I start after being on other birth control methods?