In short: we do not sell your data and show no ads. Cycle data is processed only with
your consent. Only anonymized context is sent to the AI - no name, exact dates or calendar event titles.
You can delete your data at any time.
1. Who we are
Greta is published under the name ALIC, the trading name of
Valeriia Nesterova, an individual developer based in Buenos Aires, Argentina.
She acts as the data controller for the Greta app ("Greta", "we"). You can reach us at
support@greta.press - this is the fastest way to get an
answer about your data.
This Policy explains what data we collect in the Greta mobile application (the "App"), why we collect
it and with whom we share it.
2. Data we collect
Account data: email address (for code-based sign-in), optionally a name.
Cycle and wellbeing data: period dates, cycle length, symptoms, mood, sleep, energy,
pain, discharge and other diary entries. This is special-category health data, processed only with
your explicit consent.
Health profile: optionally height, weight, date of birth, contraception and your
goal (cycle tracking or planning a pregnancy).
Health Connect (Android): with your permission we read menstruation, weight and
height records to pre-fill your calendar and health profile. Read-only and consent-based.
Phone calendar events: with your permission we read event titles and times to show
your day plan. Event titles stay on your device - only a generic type ("workout",
"meeting") is sent to our server and to the AI.
Technical data: device and app version, country and language, Premium subscription status.
3. How we use data
To calculate cycle phases, predictions, statistics and reminders.
To provide personalized guidance based on your phase, goal and wellbeing.
To operate accounts and subscriptions and to keep the service secure.
To improve the app using anonymized product analytics.
We do not use your data for advertising and do not sell it.
4. AI assistant
Guidance is generated by an external neural network (AI service provider). We send it only
anonymized context: your cycle phase and day, language, country, a generic calendar
event type and the text of your chat questions. We do not send your name, email,
exact dates, period history or calendar event titles.
Processing takes place on AI providers' servers located:
in the USA - for users in the EU/EEA, the UK and Switzerland;
in China - for users in all other countries.
AI responses are informational and not medical advice.
5. Who we share data with
Supabase (database and authentication hosting, EU region - Frankfurt) - account,
cycle settings, diary.
AI providers (neural networks) - anonymized context for assistant responses;
servers in the USA and China (see section 4).
Brevo - sign-in code emails and service emails; contact record (email, country,
language, Premium status). No health data is shared.
PostHog (EU hosting) - anonymized product analytics: screen opens, taps, sign-in
events. No cycle or symptom data is sent. Session recording is disabled.
Google Play - subscription processing.
They process data on our behalf and may not use it for their own purposes. We may disclose data where
required by law or to protect the rights and safety of our users.
6. Storage and security
We keep your data while your account exists. Some cycle data is also stored locally on your device for
offline access. Data in transit is encrypted (HTTPS/TLS). We apply reasonable technical and
organizational safeguards, although no method of transmission over the internet is completely secure.
7. Your rights
You can access, correct or delete your data, delete your account entirely in the app settings, and
withdraw your consent for health data processing (related features will then become unavailable).
If you are in the EU/EEA, you have rights under the GDPR, including data portability and the right to
lodge a complaint with a supervisory authority. Contact us at
support@greta.press and we will respond within a reasonable time.
8. Children
The App is intended for users aged 16 and over. We do not knowingly collect data from
children below this age. If this has happened by mistake, please contact us and we will delete it.
9. Changes to this Policy
We may update this Policy from time to time. We will announce material changes in the app or by email.
The current version is always available at this address and inside the app.