Prevent or plan a pregnancy naturally with the algorithm in this FDA-cleared app that uses body temperature to identify fertile and non-fertile days that are unique to your personal cycle.

Most other fertility apps assume your cycle is 28 days long. This means the fertile window they give you is not tailored to you.

The algorithm used by this app significantly reduces the risk of being assigned an incorrect fertile day by using personal data, reducing the risk of unwanted pregnancy, and helping to plan pregnancy with greater precision.

Clinical evidence shows a typical use effectiveness rate of 93% and a perfect use effectiveness of 98%.

Additionally, the app allows you to log your mood, energy, and more to see how your cycle impacts you. It also provides customized insight and expert content to help you understand your unique experience.

App syncs with the included thermometer or with an Apple Watch or Oura Ring.

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