Time to rest and reset
Menstrual phase
The uterine lining sheds and both estrogen and progesterone are at their lowest. Your body is working quietly but hard.
LilyYour cycle,
clear and calm.
Lily works out your phase, what your body needs today, your chance of pregnancy and how much water to drink — without the noise.
Get startedFour phases, four playbooks
Energy is coming back
Follicular phase
Estrogen rises and an egg matures. Mood, focus and motivation climb — your body is in building mode.
Peak fertility
Ovulation phase
The egg is released and lives 12–24 hours, but sperm can survive up to 5 days. This is the most fertile window of your cycle.
Slow down and take care
Luteal phase
Progesterone leads and your body prepares for your period. Sweet cravings and extra sensitivity show up.
Share with a partner
Create a private link and decide exactly what your partner sees — phase, symptoms or hydration. You can switch it off at any time.