Product Overview The ovulation thermometer is designed for ovulation tracking, and it is designed to help you to test your basal body temperature in the early morning. It works with the Premom Ovulation APP, which can predict your fertility window and expected period to increase your chances of conception or avoid pregnancy naturally. Place the fast basal body thermometer under your tongue. The test can be completed as fast as 60 seconds, which is extremely convenient especially when tracking regularly. This is is one of the fastest and best basal readings currently on the market. Note : No Bluetooth or Backlight included. Works with Premom APP EasyHome BBT thermometer can work with ovulation tracker Premom App. Follow below steps to start your trying to conceive and/or cycle prediction journey: Step1: Download Premom App. Step2: Enter the temperature results on App manually (Without Bluetooth). Step3: Premom App will generate bbt chart for easy reading and interepretation. Clinical Accuracy: High accuracy to satisfy your trying to conceive needs. Quick: Measurement in ONLY 1 Minute. Soft Beep: Beeps when reading is complete. The last temperature is saves automatically. It allows you to record it later on the Premom App. Switchable: Fahrenhent & Celsius is Switchable. Your best partner while trying to conceive If you want to promote or prevent a pregnancy, the basal digital thermometer is one of the best natural family planning method options. Our EasyHome basal thermometers are highly accurate in measuring temperature to the 1/100th degree so that you can easily detect your temperature change.The temperatures will be displayed in a nice vertical chart for you to look as long as you manually input the results in the app.