On your phone
Your daily log is stored encrypted on your phone. Lock it with Face ID or a PIN.
A private wellness companion for women
Your cycle, taken seriously.
Four follows the four phases of your cycle, at your own pace, learns what your body is asking of you, and answers whatever you ask. Private by design.
Private by design: we never sell your data. No ads.
Coming soon to iPhone and Android.
Your cycle is yours.
Four keeps your daily log encrypted on your phone. No ads. We do not sell your data.
No ads. No selling.
No ads, no tracking of your health, and we do not sell your data.
You are in charge
Ask Four sends only what it needs for each answer. Back up or delete your data any time.
Why Four
Female health has been under-explained for too long. Four listens, learns your cycle, and makes it a little better. Taken seriously, always.
Four phases. Your own rhythm.
01
Menstruation
02
Follicular
03
Ovulation
04
Luteal
Four follows you through each phase, then learns what is true for you.