Get 15% off on an annual plan at Natural Cycles!

Natural Cycles is the first app of its kind to be FDA Cleared and CE Marked. Natural Cycles is an app powered by an algorithm that determines your fertility status based on body temperature. Just measure, add your temperature to the app, and let our algorithm do the work. Most other fertility apps assume your cycle is 28 days long. This means the fertile window they give you is not tailored to you. Our algorithm significantly reduces the risk of you being assigned an incorrect fertile day as it uses your personal data. This reduces the risk of unwanted pregnancy, or can help you plan pregnancy with greater precision.