Privacy Policy

This Privacy Policy explains how Silmaril Technologies Inc. ("we", "us") collects, uses, shares, and protects personal information when you use the TenX app and the website at tenx.silmaril.io (together, the "Service"). We are the controller of the personal information described here.

1. Information We Collect

1. Account information

   Email address, password (stored only as a secure hash by our authentication provider), display name, and an optional profile photo. If you sign in with Google or Apple (or, where offered in your region, Kakao or LINE), we receive your email address, name, and profile photo from that provider, subject to what you allow it to share.

2. Learning content

   Problem photos you take or upload, the analyses and hints generated for them, whether you marked a problem correct or wrong, your wrong-note and review history, and study statistics such as streaks.

3. Purchase information

   Your subscription plan, status, and expiry, and the transaction identifiers we receive from the App Store or Google Play through RevenueCat. Payments are handled by Apple or Google; we never receive your card details.

4. Device and usage information

   App version, platform, language, time zone, IP address, pages and features used, and error logs. If you allow notifications, we store your device's push token, language, and time zone so we can send solution-ready alerts and review reminders.

5. Advertising information

   On the free plan, Google AdMob may collect device and advertising identifiers and ad interactions to show and measure ads. Subscribers do not see ads.

6. Information you send us

   Feedback, bug reports, and any screenshots or contact details you include.

2. How We Use Information and Our Legal Bases

• To provide the Service — creating your account, analyzing problems, saving wrong notes, and showing statistics (necessary to perform our contract with you).
• To process subscriptions — verifying purchases and unlocking paid features (contract; legal obligations for transaction records).
• To send notifications — solution-ready alerts and wrong-note review reminders, only if you allow notifications. You can turn review reminders off in My Page or disable notifications in your device settings (consent).
• To keep the Service secure and working — preventing abuse, enforcing usage limits, and fixing errors (legitimate interests).
• To understand and improve the Service — measuring feature usage with analytics (legitimate interests, or consent where required by law).
• To show ads on the free plan (legitimate interests, or consent where required by law).
• To respond to you — answering feedback and support requests.

We do not use your problem photos or learning records to train AI models, and we do not make decisions about you that produce legal or similarly significant effects based solely on automated processing.

3. AI Processing

When you submit a problem, we send the image and our instructions to an AI provider (OpenAI or Google Gemini) to generate the analysis. We do not send your name, email address, or account identifiers with the image. The result is stored in your account so you can review it later.

4. Service Providers

We share personal information only with providers that process it on our behalf to run the Service:

We may also disclose information when required by law, to protect the rights and safety of our users or others, or as part of a merger or acquisition, in which case this policy will continue to apply.

5. Advertising and Your Choices

• We do not sell personal information for money.
• Ads on the free plan are served by Google AdMob, which may use device identifiers. Under some U.S. state laws this may be treated as "sharing" for cross-context behavioral advertising. To opt out, email us at the address below, or limit ad personalization on your device (on Android, reset or delete your advertising ID; on iOS, the app does not request permission to track you).
• Subscribing to Pro removes all ads.

6. How Long We Keep Information

• We keep your account and learning data for as long as your account exists.
• You can delete your account at any time in My Page > Settings > Delete Account. Deletion starts immediately and normally completes within minutes; it removes your uploaded images, learning records, wrong notes, purchase records held by us, push tokens, and your account. Copies in routine database backups are overwritten in the normal backup cycle.
• Apple, Google, and RevenueCat keep their own transaction records under their policies, and we may retain information where the law requires it.

7. Your Rights

Depending on where you live (for example, the UK, the EU/EEA, or certain U.S. states), you may have the right to:

• Access the personal information we hold about you and receive a copy in a portable format.
• Correct inaccurate information.
• Delete your information (you can do this yourself in the app).
• Object to or restrict certain processing, including processing based on legitimate interests.
• Withdraw consent at any time, without affecting earlier processing.
• Opt out of the sale or sharing of personal information for targeted advertising.
• Not be discriminated against for exercising these rights.

To exercise a right, email us at the address below. We may need to verify your identity, and we will respond within the time required by applicable law. If you are in the UK or the EU/EEA, you also have the right to complain to your data protection authority, such as the UK Information Commissioner's Office or the Data Protection Commission in Ireland.

8. Children

You must be at least 13 years old to use the Service, and users under 18 should have permission from a parent or legal guardian. The Service is not directed at children under 13, and we do not knowingly collect their personal information. If you believe a child under 13 has given us personal information, contact us and we will delete it.

9. International Transfers

We are based in South Korea, and our main database is located there. Some providers listed above process information in other countries, including the United States. Where the law requires, we rely on recognized transfer safeguards, such as the standard contractual clauses included in our providers' data processing terms.

10. Security

We protect personal information with measures including encryption in transit, access controls that let each user reach only their own data, and restricted administrative access. No method of transmission or storage is completely secure, so we cannot guarantee absolute security.

11. Cookies and Similar Technologies

We use cookies and local storage to keep you signed in and remember your settings, and Google Analytics cookies to measure usage. You can block cookies in your browser, but some features may not work.

12. Contact Us

13. Changes to This Policy

We may update this policy from time to time. If we make material changes, we will notify you in the app before they take effect. This version was last updated on October 2, 2026.