femSense is a new form of basal body temperature measurement that works completely automatically. The femSense system consists of a skin patch with an integrated temperature measurement chip. This patch is placed under the armpit and measures your body temperature continuously for up to seven days after activation.
The patch should be read twice a day to get new information every day. Based on the recorded data, femSense detects your ovulation and also tells you when you are most fertile. The app reminds you when to stick the patch and shows when you are most fertile.