The Femometer is a fertility thermometer designed for women. It measures the body basal temperature which is displayed on the mobile phone. According to the changes in the body temperature, the application on the phone accurately predicts the next cycle information, such as ovulation, menstrual period, safe period and so on. The product has no screen or buttons, it transfers the data automatically through Bluetooth, it does not require users to carry out redundant operations. The part under the tongue is ergonomically designed, you will feel so comfortable when you have the Femometer in your mouth. The error will be plus or minus 0.05 ℃.