The lifestyle fertility tracker Daysy allows women striving for a health-conscious lifestyle to monitor their individual monthly cycle and to determine their fertile and infertile days in natural harmony with their bodies. The design conveys femininity and clarity. Since the unit measures the basal body temper­ature under the tongue, its form and haptics are inspired by a spoon, resting comfortably in the hand. The friendly aesthetics and intuitive operation make this tracker a congenial daily companion.