Privacy Policy

Last updated: July 3, 2026

1. Who we are

Lenia App ("Lenia," "we," "us," "our") provides an online language learning platform accessible via our website and applications (the "Service"). This Privacy Policy explains how we collect, use, and protect your personal data when you use the Service, in accordance with the EU General Data Protection Regulation (GDPR) and applicable German data protection law (BDSG).

Data controller: Lenia App [Legal entity name / registered address — to be added] [Handelsregister number — to be added, if applicable] [VAT ID — to be added, if applicable] Germany

Contact: privacy@lenia.app

If we appoint a Data Protection Officer, their contact details will be added here.

2. Data we collect

2.1 Data you provide directly

Account data: name, email address, password (hashed), preferred learning language(s), date of birth (to verify you meet our 18+ age requirement)

Profile & learning data: placement test answers and results, course/lesson progress, flashcard review history, streaks and points

Content you create: writing submissions, saved vocabulary, notes, uploaded audio (for listening tracks), imported video links

Speaking & conversation data: audio recordings and transcripts generated during AI speaking/conversation practice sessions

Payment data: handled directly by Stripe (and, for mobile, RevenueCat) — see Section 4. We do not store full card numbers on our own servers.

Support communications: anything you send us via email or in-app support

2.2 Data collected automatically

Usage data: pages/features visited, session duration, device and browser type, IP address, general location (city/country level, derived from IP)

Technical data: log data, error reports, cookies and similar technologies necessary for the Service to function (see Section 7)

We do not currently use third-party analytics or advertising trackers.

3. How we use your data and our legal basis

We use your data for creating and managing your account, delivering learning content, processing AI features, payment processing, age verification, maintaining security, responding to support requests, and sending essential service emails. We do not sell your personal data. We do not use your data for behavioral advertising.

4. Third parties we share data with (subprocessors)

We use the following service providers to operate Lenia: Railway (application hosting), Vercel (frontend hosting), Cloudflare R2 & Stream (media storage), Stripe (payments), RevenueCat (mobile), Anthropic Claude (writing feedback), Google Gemini (conversation practice), OpenAI Whisper/TTS (speech), YouTube Data API (video metadata).

Where data is transferred outside the European Economic Area (EEA), we rely on the European Commission's Standard Contractual Clauses (SCCs) as the transfer safeguard.

We do not permit these providers to use your data for their own purposes beyond providing their service to us.

5. Data retention

Account data: retained for as long as your account is active, plus up to 10 years for billing records under German commercial law

Learning and content data: retained while your account is active, deleted upon account deletion

AI conversation/audio data: retained only as long as needed to provide the feature, then deleted or anonymized

Support communications: retained for as long as needed to resolve your inquiry and for quality/dispute purposes

You can request earlier deletion at any time (see Section 6).

6. Your rights

Under GDPR, you have the right to access, rectify, erase, restrict processing, data portability, object to processing, withdraw consent, and lodge a complaint with a supervisory authority.

To exercise any of these rights, contact us at privacy@lenia.app. We will respond within one month as required by GDPR.

7. Cookies

We use only cookies strictly necessary for the Service to function: Session/authentication cookies (httpOnly, used to keep you logged in) and CSRF protection cookies.

We do not use third-party advertising or tracking cookies. If this changes in the future, we will update this policy and request consent where required.

8. Data security

We apply appropriate technical and organizational measures to protect your data, including encryption in transit (TLS), hashed passwords, access controls, and regular security review of our infrastructure. We are committed to promptly investigating and addressing any incident.

9. Children's privacy

Lenia is intended for users 18 years of age and older. We do not knowingly collect data from anyone under 18. If we learn that we have collected data from a user under 18, we will delete it promptly.

10. Changes to this policy

We may update this Privacy Policy from time to time. Material changes will be communicated via email or an in-app notice before they take effect. Continued use of the Service after changes take effect constitutes acceptance of the updated policy.

11. Contact

Questions about this Privacy Policy or our data practices:

Email: privacy@lenia.app

Postal address: [To be added]