DupDup Terms of Service

Effective and last updated: July 18, 2026

DupDup (the “Service”) is a language-learning mobile service provided by the DupDup operator (“we”, “us”). By tapping agree, creating an account, signing in, or using the Service, you confirm that you have read and accepted these Terms. Rights that cannot be waived under mandatory law are not limited by these Terms.

1. The Service

The Service may include camera and photo-library text recognition, translation, reading assistance, learning explanations and knowledge points, dictionary and review tools, and optional subscription features shown in the App. We may change, update, or discontinue features and do not guarantee that a particular feature will always be available except where required by law.

2. Accounts and sign-in

You may create an account using sign-in providers shown in the App, such as Apple, Google, or Kakao. You must be authorized to use the provider account and keep the information you provide accurate. Accounts are for your personal, non-commercial use and may not be sold, lent, or transferred.

3. Account deletion

While signed in, use Me → Delete account to request deletion of your account and associated learning data. If the in-app request fails or you have questions about the process, email balian.wang1997@gmail.com. After deletion, information is handled under the Privacy Policy and applicable law; information that must be retained by law is excluded.

4. Subscriptions and payments

If auto-renewing subscriptions are offered, billing, renewal, cancellation, and refunds follow the terms and policies of Apple App Store or the applicable app store. Prices, billing periods, and entitlements are shown in the in-app purchase flow and store checkout. You can manage or cancel a subscription in your device or store-account settings.

5. Acceptable use

You must not use the Service unlawfully, infringe another person’s rights, harass, defraud, distribute malware, interfere with the Service, or harm another user. You must have the rights needed for images and text you submit, and must not submit another person’s personal information without the permission required by law.

6. AI results and intellectual property

Recognition, translation, explanations, and learning assistance are for reference only and are not legal, medical, financial, or other professional advice. We do not guarantee that generated results are accurate or complete; independently verify information before making an important decision.

Our software, UI, branding, documentation, and other Service materials, excluding third-party materials, are owned by us or our licensors. You may not copy, modify, distribute, sell, or reverse engineer them without permission.

7. Restrictions and termination

We may take reasonable action, including warnings, feature restrictions, suspension, or termination, when a user violates these Terms or law or creates a risk to the Service, users, or third parties. You may stop using the Service at any time.

8. Disclaimers and liability

The Service is provided as available to the maximum extent permitted by law. We are not responsible, to the extent reasonably outside our control, for interruptions, errors, or data loss caused by networks, device compatibility, third-party services, maintenance, or force majeure. Where applicable law does not allow a limitation, that law controls.

9. Changes

We may update these Terms when the Service, law, or operating practices change. We will give prominent notice in the App or on the public website for material changes. If mandatory law requires separate consent, we will follow that process. Continued use after the effective date of a change means you accept the revised Terms to the extent permitted by law.

10. Contact

For questions about these Terms, accounts, subscriptions, or the Service, email balian.wang1997@gmail.com. You may include the account email and App version to help us investigate, but do not send passwords or authentication tokens.