A scientific fertility monitor measuring core body temperature and LH hormone levels via ovulation test strip to track cycle and days of fertility.
*Please note NaturalCycles is aimed for women in stable relationships. If you are single, you can still use NaturalCycles for your personal health information. NaturalCycles recommends however to use condoms regardless of the colour of the day as you need to protect yourself from sexually transmitted diseases.
NaturalCycles tracks fertility with scientific accuracy.
On a red day you could be fertile and need to take precautions.
On a green day the app is 99.9% certain you are not fertile
Simply take your temperature each morning to discover your fertility for the day.
For further accuracy use LH hormone ovulation test strips.
But on a green day the app is 99.9% certain you are not fertile.