Privacy Policy

Last updated: October 10, 2026

1. Introduction

Tanu ("we," "us," or "our") respects your privacy. This Privacy Policy explains how we collect, use, and protect your personal information when you use the Tanu app, website and related services (the "Service").

2. Information We Collect

Information you provide

• Account credentials: your email address and password when you register (passwords are stored securely hashed by our authentication provider; we cannot see them). If you sign in with Apple or Google, we receive the email address they share with us.
• Onboarding answers: the name you would like Tanu to call you, your Japanese level, your reasons for learning, the topics you enjoy, your daily goal, your reminder time, and how you heard about Tanu.
• Feedback: messages you send through "Send feedback", together with the app version and device type.
• Clip reports: when you report a clip, we receive the clip concerned, the reason you select, and any note you add.

Information collected automatically

• Learning activity: clips you watch (and how much of each), and clips you like or save, used to choose clips that suit you and to avoid repeats.
• Usage data: screens viewed, interactions, and feature usage via PostHog analytics.
• Search queries: the words you search for in Explore, used to understand what learners are looking for.
• Device information: device model, operating system, app version, and approximate location derived from your IP address.

Information stored only on your device

Your saved words, flashcard progress, daily watching time and streak are stored on your device.

Payment information

Subscriptions are purchased through Apple's App Store or Google Play. Payments are processed by Apple or Google; we do not receive or store your card details. We only receive the status of your subscription or free trial.

3. How We Use Your Information

We use your information to:

• Operate, maintain, and improve the Service
• Create and manage your account and keep your learning progress
• Recommend clips suited to your level and interests
• Provide your subscription
• Send the daily reminders you choose (scheduled on your device; you can turn them off at any time)
• Respond to your feedback and support requests
• Analyze usage patterns to improve the user experience
• Comply with legal obligations

4. Third-Party Services

We use the following third-party services to operate Tanu:

• Supabase: database and authentication
• PostHog: product analytics
• Apple and Google: app distribution, payment processing, and Sign in with Apple / Google
• RevenueCat: subscription status management
• YouTube: video playback through YouTube's embedded player, which is governed by Google's Privacy Policy

Each of these services has its own privacy policy governing how they handle your data. We encourage you to review their policies.

5. Tracking

We do not use advertising trackers and we do not show ads. We use PostHog analytics to understand how the Service is used. Our website does not use advertising or tracking cookies.

6. Data Sharing

We do not sell your personal information. We may share your information only in the following circumstances:

• With third-party service providers who help us operate the Service (as listed above)
• When required by law or to protect our legal rights
• In connection with a merger, acquisition, or sale of assets (with notice to you)

7. International Data Transfers

Our service providers may store and process information in countries other than your own, including the United States. When this happens, we take reasonable steps to ensure your information is protected in line with this Privacy Policy.

8. Data Retention

We retain your personal information for as long as your account is active or as needed to provide the Service. You can delete your account at any time in the app (Settings → Delete account); your account, profile, likes, saves and watch history are then deleted immediately. If you request deletion by email, we will remove your data within 30 days, except where retention is required by law. Feedback and clip reports you have sent are kept without being linked to you.

9. Your Rights

You have the right to:

• Access the personal data we hold about you
• Request correction of inaccurate data
• Request deletion of your data
• Request a copy of your data in a portable format

To exercise any of these rights, email us at tanuhelp.app@gmail.com. Depending on where you live, you may have additional rights under local law, for example in the European Union, the United Kingdom, California or Australia.

10. Data Security

We implement reasonable security measures to protect your personal information, including encryption in transit (HTTPS) and access controls that let each account read only its own data. However, no method of transmission over the Internet is 100% secure, and we cannot guarantee absolute security.

11. Children's Privacy

The Service is not directed to children under 13. We do not knowingly collect personal information from children under 13. If we learn that we have collected such information, we will delete it promptly.

12. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of material changes by posting the updated policy on this page with a new "Last updated" date. Continued use of the Service after changes constitutes acceptance.

13. Contact Us

If you have questions about this Privacy Policy, please contact us at tanuhelp.app@gmail.com.