breathe ilo is the only cycle tracker that detects your fertile days in real time.
The hormonal changes that naturally occur during the female menstrual cycle alter the CO2 levels in a woman’s breath.
breathe ilo measures these CO2 levels and transmits the data to the breathe ilo smartphone app.
Accurately predict your most fertile days by breathing into the breathe ilo device for just one minute per day. The self-learning algorithm gets to know you better with each cycle.