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Privacy Policy

Last updated: 2 September 2026

This Privacy Policy explains how Lingvoji (“Lingvoji”, “we”, “us”) collects, uses, and shares information when you use the Lingvoji mobile application (the “App”) and the website at lingvoji.app (the “Site”).

If you do not agree with this policy, please do not use the App or the Site. Questions: privacy@lingvoji.app.

1. Who we are

Lingvoji is a language-learning product. The App lets you practice vocabulary with emoji, folders, daily goals, streaks, and spaced repetition (SRS). The operator of the App and Site is Lingvoji. You can reach us at support@lingvoji.app or privacy@lingvoji.app.

2. Information we collect

Account and identity

You can try a demo lesson without an account. If you sign in, we receive information from the sign-in provider you choose:

Apple Sign In or Google Sign In via Firebase Authentication
A unique user identifier (UID)
Email address, display name, and profile photo URL if the provider shares them

We store a Lingvoji user profile linked to that UID so progress can sync.

Learning and settings

To run the product we store:

Source and target languages
Daily goal (Easy, Steady, or Serious) and related settings
Folder, category, and card progress, including SRS due state
Study statistics (for example cards reviewed today, streak, week marks, learned count)
Continue-learning pointers (last folder or session context)
Reminder preference and reminder time, stored on device and used to schedule local notifications

Some language choices and the daily goal may also be cached on device (for example with local storage) so the App can resume after a restart.

Feedback and reports

If you send feedback from Profile, we receive the text you type and enough account context to look at the report. If you flag an exercise, we receive the reason you pick (wrong translation, wrong emoji, typo/grammar, offensive/inappropriate, or other), an optional note, and identifiers for the vocabulary item and exercise type.

Technical data

Our API and hosting providers may log IP address, timestamps, device or app identifiers, and request metadata needed to operate, secure, and debug the service. Push notification delivery uses the operating system’s notification services when you enable reminders.

Information we do not collect as a core product feature

We do not require contacts, precise location, photos from your library, or microphone access to learn. We do not sell personal information.

3. How we use information

We use information to:

Create and authenticate your account
Provide lessons, folders, dictionary, SRS, streaks, and daily goals
Remember settings and show the right language pair
Schedule optional daily reminders you turn on
Review feedback and exercise reports and improve content
Keep the service secure, prevent abuse, and fix bugs
Comply with law and App Store / Google Play rules
Communicate with you about support or material product changes

4. Legal bases (EEA/UK)

If GDPR or UK GDPR applies, we typically rely on:

Contract — to provide the App you asked for (account, lessons, progress)
Legitimate interests — to secure the service, understand product quality from reports, and improve Lingvoji in a way that does not override your rights
Consent — where required, for example optional notifications on some platforms, or certain analytics if we add them later and ask
Legal obligation — when we must keep or disclose data

We share data only as needed to run Lingvoji:

Firebase / Google — authentication (and related Google infrastructure for the Firebase project)
Apple — if you use Sign in with Apple
Hosting and API providers — to serve api.lingvoji.app and store application data
Apple and Google — if you choose Leave review, the App opens the store; those companies process data under their policies
Authorities — if required by law or to protect rights, safety, or the service

We do not sell your personal information and we do not share it for cross-context behavioral advertising as that term is used in US state privacy laws.

If we ever use analytics or crash tools, we will name them here and, where required, ask for consent or provide an opt-out.

6. Storage, processors, and transfers

Account and learning data are processed on our servers (including https://api.lingvoji.app) and by processors such as Firebase. Those providers may process data in the United States or other countries. Where we transfer personal data out of the EEA or UK, we use appropriate safeguards such as Standard Contractual Clauses when they apply to the processor.

7. How long we keep data

We keep account and learning data while your account is active. If you ask us to delete your account, we delete or anonymize personal data unless we must keep a limited record (for example to complete a support case, meet a legal duty, or resolve a dispute). Server logs are kept only as long as needed for security and operations. Device-side reminder settings remain until you change them or uninstall the App.

8. Your rights and choices

Depending on where you live, you may have rights to access, correct, delete, or export personal data, to object to or restrict certain processing, and to withdraw consent. You may also have the right to lodge a complaint with a supervisory authority.

To exercise rights, email privacy@lingvoji.app from the address on your Lingvoji account. We may need to verify it is you.

In the App you can update languages, daily goal, and reminders in Profile. You can stop using optional notifications in Profile and in your device settings. Uninstalling the App removes local data on that device; it does not by itself delete your server account — ask us if you want that deleted.

California and similar US state laws: we do not sell or share personal information for targeted advertising. You may still request access or deletion as described above.

9. Children

Lingvoji is not directed at children under 13 (or under 16 where that is the relevant age). We do not knowingly collect personal information from children. If you believe a child has created an account, contact privacy@lingvoji.app and we will delete it.

10. Security

We use HTTPS for the API, token-based authentication after sign-in, and access controls on our systems. No method of transmission or storage is perfectly secure. Please keep your Apple or Google account protected.

11. The website

The marketing Site is static. It does not require an account. Hosting may produce standard server logs (IP address, user agent, pages requested). We do not run advertising pixels on the Site as of the date above. If we add cookies that are not strictly necessary, we will update this policy.

12. Changes

We may update this policy. We will change the “Last updated” date and, for material changes, provide additional notice in the App or on the Site when it is reasonable to do so. Continued use after the update means you accept the revised policy.

13. Contact

Privacy: privacy@lingvoji.app
Support: support@lingvoji.app
Web: https://lingvoji.app