How Lena works
Knows your cycle. Knows its limits.
Lena is a women’s health AI. It answers from what you share, and flags when a doctor should weigh in.
Lena knows only what you share.
Your cycle, symptoms, check-ins and assessments shape each answer, so it’s about you, not an average.
Your cycle
Your cycle day is computed from the dates you log, not guessed.
Symptoms and check-ins
What you log in the app, or mention in chat.
Assessments
Your answers and results, like your FertiScore.
Apple Health or Health Connect
Sleep, activity and heart rate, only if you connect them.
Your conversations
What you’ve already told Lena, so you don’t have to repeat yourself.
Where the answers come from.
Lena’s answers come from large language models, guided by your own context and by assessments our medical team reviewed.
You ask
In your own words, day or night.
Lena adds your context
Only the relevant part of your record.
You get an answer
In plain words, with sources for medical claims.
Built with doctors, not just data.
Lena’s medical team, led by Prof. Arash Rafii, reviews its assessments.
Meet the team behind Lena
Lena knows where its job ends.
Information, never a diagnosis.
Lena explains what may be going on. It doesn’t diagnose, prescribe or replace your doctor.
A doctor, when it matters.
When something needs a doctor, Lena says so, and Doctor Chat is one tap away.
How Doctor Chat worksNot for emergencies.
Call your local emergency number: 112 across the EU, 15 in France.
Your data, your call.
Read the privacy policy- Where it’s stored
In the EU, under GDPR.
- Who we sell it to
No one, ever.
Not advertisers, insurers, employers or data brokers.
- Apple Health and Health Connect
Only if you connect them.
Read-only: Lena never writes to them.
- Your account
Delete it anytime.
In the app’s Settings, or online.
Delete your account
Straight answers.
Lena is on your phone in a minute.
Free to start. Ask Lena anything, or talk to a real doctor in the same app.
