Lanbla Speak

Privacy Policy

Last updated: October 18, 2026

Lanbla Speak (the "Service") is an AI conversation-practice service for users of the language-learning app Lanbla, provided by the same operator. We handle your personal information with care. This Privacy Policy explains what information the Service collects and how it is used and managed.

1. Information we collect

When you use the Service, we may collect the following information.

  • Account information: the user identifier, email address and name we receive when you log in with Apple or Google (we never receive your password). When you open the Service from the Lanbla app, or use Lanbla with the same account, we also receive from Lanbla your Lanbla user identifier, display language, study language and Lanbla plan
  • Learning settings: display language, study language and language level
  • Conversation content: transcripts of what you said during practice, the AI's replies, corrections, translations and hints, saved sentences and words, and topics you created (roles and situation descriptions)
  • Audio: recordings of your speech are sent for transcription only and are not stored on our servers once transcription is complete
  • Conversation partner settings: the name, gender, relationship, personality, origin and bio of the partners you register, and the "things the partner remembers" that the AI summarizes from your conversations (a summary of what you told them)
  • Purchase information: subscription status, expiry date and store type (we never receive amounts or card details)
  • Device information: OS type (iOS / Android) and app version
  • Usage: how much AI, speech recognition and text-to-speech you use (to manage limits and costs), sign-in times and error logs

2. How we use information

  • To provide, maintain and improve the Service
  • So that your conversation partners can talk with past conversations in mind (per-partner memory)
  • To send the sentences and words you check on the summary screen to your Lanbla account
  • To manage the usage limits of the free and paid plans, and to show ads
  • To respond to inquiries
  • To prevent abuse and respond to violations of the Terms of Service

3. Sharing with third parties

We do not provide personal information to third parties without your consent, except where required by law. The Service and Lanbla are provided by the same operator, and transfers between them are not third-party sharing.

4. External services

The Service uses the following external services. Each provider receives only the information needed to deliver its function.

  • Anthropic (AI replies, corrections, translations and hints, suggested sentences to save, and partner memory summaries): conversation transcripts, study and display languages, language level, topic and partner settings, and partner memory
  • OpenAI (speech recognition): recordings of your speech and cues such as the study language. The Service receives only the transcription
  • Google Cloud Text-to-Speech (read-aloud): the text to be spoken, such as the AI's replies
  • App Store / Google Play and RevenueCat (in-app purchases): purchase and subscription status and an anonymous user identifier issued by the Service
  • Google AdMob (ads on the free plan): information needed to serve ads, such as advertising identifiers and device information. We show only non-personalized ads and never ask for permission to track you across apps
  • YouTube (the introduction video on the Japanese page of our website): when you play the video, information needed for playback, such as device and browser information, is sent to YouTube (Google), and cookies or similar technologies may be used. The video is embedded in privacy-enhanced mode, so YouTube cookies are not used until you play it
  • Lanbla (the language-learning app from the same operator): the sentences and words you check on the summary screen with their translations, and the conversation's title and date. They are saved in your Lanbla account as a "Conversation" folder

Please see each provider's privacy policy for how they handle information. If we add a new external service, we will update this policy.

5. Cookies

We use a cookie to keep you signed in. We do not use cookies for advertising. When you play the introduction video (YouTube) on the Japanese page of our website, YouTube (Google) may use cookies or similar technologies.

6. Retention and deletion

You can delete your conversation records, registered partners, saved sentences and words, and settings with "Delete my account" on the Name screen in Settings. If you delete your Lanbla account, the link between the Service and Lanbla is removed, but your data in the Service remains (you can delete it from "Delete my data" in the Service). Sentences and words already sent to Lanbla are Lanbla data and are governed by Lanbla's privacy policy. Usage records for AI, speech recognition and text-to-speech may be kept in a form that does not identify you.

7. Contact

For questions about this policy, please contact us at:

Email: support@lanbla.com

8. Changes to this policy

We may change this policy without prior notice when necessary. The revised policy takes effect when posted on this page.

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