Terms of Service

Introduction

Welcome. The Service is developed and operated by LI ENZENG (the "Developer", "we", "us", or "our"). These Terms of Service (the "Terms") govern your access to and use of Worldku, including worldku.com and related software, features, applications, websites, and services (together, the "Service").

By accessing or using the Service, you agree to these Terms and our Acceptable Use Policy, also called the Usage Policy, and acknowledge our Privacy Policy. If you do not agree, do not use the Service.

Worldku is a product brand operated by the Developer.

1. Access and Use

1.1 Access grant

Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable right to access and use the Service.

1.2 Content

You may provide inputs to the Service ("Input") and receive AI-generated output based on those inputs ("Output"). Input and Output are together "Content".

We may use Content to provide the Service, comply with applicable law, enforce our terms and policies, and protect the Service, users, and third parties. Our additional use of Content for evaluation, improvement, training, or fine-tuning is described in Section 1.3 and in the Privacy Policy.

By submitting Input, you represent and warrant that you have all rights, licenses, permissions, and authorizations necessary for us to process that Input and provide the Service.

1.3 Model training and opt-out

We reserve the right to use Content to operate, evaluate, improve, train, and fine-tune our models and systems by default. You may opt out of the use of your Content for training, fine-tuning, and model or safety-system improvement in the Service settings.

An opt-out applies only going forward. Even after you opt out, we may still use Content as necessary to provide the Service, comply with law, enforce policies, and act on safety or security issues involving that Content. We will not use opted-out Content to train or improve models or safety systems. If Content was used for training before your opt-out took effect, its effect on already-trained models may not be reversible.

1.4 Limits of AI Output

Output is generated by machine-learning systems and may be inaccurate, incomplete, misleading, offensive, or not fit for your intended purpose. Output may be similar or identical to output generated for other users.

The Service is not intended to provide advice that requires professional qualifications, including legal, medical, financial, investment, tax, or other regulated advice. You are responsible for evaluating Output before relying on it, including by checking primary sources or consulting a qualified professional where appropriate.

1.5 Use restrictions

Except to the extent a restriction is prohibited by applicable law, you must not:

• reverse engineer, decompile, disassemble, decode, or try to derive source code, model weights, prompts, system design, or underlying structure of the Service;
• copy, modify, translate, sell, rent, lease, lend, sublicense, or create derivative works from the Service except as expressly allowed by us;
• remove proprietary notices;
• use the Service or Output to develop, train, fine-tune, benchmark, extract, distill, or improve a competing model or service, except where we expressly allow it in writing;
• probe, scan, penetrate, disable, bypass, overload, or misuse any security, rate-limit, abuse-prevention, or access-control mechanism;
• scrape, harvest, or extract data from the Service;
• use the Service in a way that infringes, misappropriates, or violates any intellectual property, privacy, publicity, confidentiality, or other rights;
• use the Service in violation of applicable law;
• submit data that is subject to special legal protection beyond ordinary personal data, such as health, financial, biometric, government-ID, or similar sensitive data, unless we expressly support that use; or
• knowingly allow another person to do any of the above.

If you discover unauthorized use of the Service, you must promptly notify us and reasonably assist us in stopping it.

1.6 Prohibited uses

You must comply with our Acceptable Use Policy. Without limiting that policy, you must not use, direct, support, or allow use of the Service for:

• terrorism, organized violence, hate-based violence, or threats to public safety or critical infrastructure;
• weapons, explosives, CBRNE materials, or other activities that could cause serious physical harm;
• illegal goods, services, transactions, or gambling involving real money or economic benefit;
• NSFW, explicit, pornographic, erotic, or sexually suggestive content generation, sexual services, human trafficking, sexual exploitation, or prostitution;
• unauthorized access to, alteration of, destruction of, or interference with systems, networks, data, or assets;
• harassment, coercion, threats, defamation, persistent unwanted contact, or other conduct that harms personal dignity or mental well-being;
• content that promotes, encourages, glamorizes, or instructs self-harm, suicide, eating disorders, or other dangerous behavior;
• sexual violence, non-consensual sexually explicit content, or sexually explicit content involving intellectual property or characters you do not have rights to use;
• collecting, analyzing, using, or disclosing personal data without lawful and valid consent;
• unauthorized facial recognition databases, remote biometric identification in public spaces, sensitive-attribute inference, unjustified emotion or mental state inference in work or education settings, or criminal-risk prediction based solely on profiling;
• sexual abuse or exploitation of minors, grooming, inappropriate sexual, violent, or self-harm content for minors, dangerous activity for minors, bullying or defamation of minors, or helping minors access the Service;
• fraud, impersonation, misinformation, election or democratic-process manipulation, or abuse of trust;
• fully automated high-risk decisions in areas such as social infrastructure, education, housing, employment, credit, insurance, healthcare, legal services, public services, national security, immigration, criminal justice, or law enforcement without appropriate qualified human involvement;
• arbitrary censorship or improper restriction of expression or access to information; or
• professional advice or judgments requiring a license, qualification, or permit without appropriate qualified professional involvement.

Where applicable law requires disclosure that Output is AI-generated, you are responsible for making that disclosure.

If we reasonably believe that you have violated or are likely to violate these Terms, we may suspend, restrict, or terminate your access to the Service and take other reasonable steps without prior notice.

2. Eligibility

You must have reached the age of legal majority in your jurisdiction or be at least 18 years old, whichever is higher, to use the Service.

By using the Service, you represent and warrant that:

• you meet the age requirement and have legal capacity to enter into these Terms;
• you have not previously been suspended or removed from the Service; and
• your registration and use comply with applicable law.

The Service is not directed to, actively offered to, or actively marketed to users located in the European Economic Area, the United Kingdom, or Switzerland. We may use technical controls, including IP-based restrictions, to limit availability in unsupported regions. If you access the Service from an unsupported region, you do so on your own initiative and are responsible for compliance with local law.

3. Account Registration and Access

You sign in using a one-time password sent to your email address, with bot detection or CAPTCHA where applicable. Your account identity is your email address.

You must provide accurate, complete, and non-misleading information and keep it current. You are responsible for account security and all activity under your account. You must not share, transfer, sell, or lend your account.

If you believe your account is no longer secure or notice unauthorized use, you must promptly notify us through the in-product help entry. Except for our own willful misconduct or gross negligence, we are not responsible for losses caused by loss, theft, or misuse of your credentials.

4. Payment

4.1 Paid services

Some features of the Service may require payment. Before you are charged, you will have an opportunity to review and accept the applicable fees. Except as stated in these Terms or required by law, fees are non-refundable once paid.

4.2 Pricing

We may set and change pricing for the Service. We will make reasonable efforts to keep pricing information current and to give notice of material price changes through the Service, email, or another reasonable method before those changes take effect. If you continue using paid features after a price change takes effect, you accept the new price.

You are responsible for taxes related to your use of the Service, except taxes based on our net income.

4.3 Payment processing

Web payments are handled by third-party payment processors and are subject to their terms and privacy policies. We do not store your payment-card details. We are not responsible for failures by a payment processor except to the extent required by law.

4.4 Subscriptions and automatic renewal

The Service may include subscriptions that renew automatically. A subscription begins on the subscription billing date and renews for the selected billing period until cancelled by you or us.

By enabling a subscription, you authorize us or our payment processor to charge you on or before each renewal date. You may cancel future renewal through the billing menu or the in-product help entry. You must cancel before the renewal date to avoid the next charge. After cancellation, you may continue using the subscription through the end of the current paid period, and fees already paid for that period are non-refundable except as required by law.

4.5 Mobile in-app purchases

Purchases made through Apple in-app purchase or another app-store payment system are billed by that app store and are subject to that app store's terms. Refunds for those purchases are handled by the app store under its policies, and you must direct refund requests to the app store unless applicable law requires otherwise.

4.6 Credits and top-ups

The Service may offer credits, top-ups, usage units, or similar prepaid items. They are not legal tender, stored value, or cash equivalents. Except as required by law, they are non-refundable, not redeemable for cash, may expire, and may be used only by the account to which they were issued. They may not be transferred, sold, or gifted.

4.7 Overdue accounts

If amounts are due but unpaid, we may suspend or terminate access to the Service, including paid features. We may also charge reasonable incidental costs related to refunds, chargebacks, or collection where allowed by law. If your payment method is invalid at renewal, we may cancel your subscription or account without liability, subject to applicable law.

5. Ownership and License

5.1 The Service

We and our licensors own and retain all rights, title, and interest in the Service, its improvements, and related intellectual property, including the Worldku name and marks. No implied license is granted. We reserve all rights not expressly granted.

5.2 Feedback

If you provide comments, ideas, ratings, or suggestions about the Service ("Feedback"), you grant us the right to use, develop, disclose, and exploit that Feedback without restriction and without compensation to you.

5.3 Content

You retain the rights you have in your Input. To the extent we own any rights in Output, we assign those rights to you, subject to your compliance with these Terms and applicable law.

For operating, providing, securing, evaluating, improving, training, and fine-tuning the Service as described in these Terms and the Privacy Policy, you grant us a worldwide, non-exclusive, royalty-free, sublicensable, and transferable license to host, store, reproduce, process, adapt, transmit, display, and use your Content. To the extent permitted by law, you waive moral rights against us for those uses.

5.4 Usage data

We may collect, analyze, and process technical logs, usage events, and insights about use of and interaction with the Service ("Usage Data") for internal business purposes, including security, analytics, improvement, debugging, and operations. Usage Data does not include Content.

We may disclose Usage Data to third parties only in aggregated or de-identified form that does not identify you.

6. Third-Party Services

The Service may include or integrate third-party services, such as third-party large language model providers, cloud hosting and object storage providers, product analytics providers, payment processors, and app-store payment systems.

If you connect your own third-party voice-provider key, we use that key only to process your requests and store it in encrypted form. You may disconnect it at any time.

Product analytics are off by default and run only after you grant consent.

Your use of third-party services is governed by their terms and is at your own risk. Except as expressly stated in these Terms, we do not make representations about, and are not responsible for, third-party services.

7. Communications

We may send you service-related messages and, where allowed, promotional emails about our or third parties' products and services. You may opt out of promotional emails through the unsubscribe function in the email. Service-related notices are not promotional and may still be sent.

8. Changes to These Terms

We may update these Terms from time to time. For material changes, we will update the effective date and keep the latest version available on the legal page, and we may provide additional notice where appropriate or required by law.

Changes take effect when posted unless a later effective date is stated. Your continued use of the Service after changes take effect means you accept the updated Terms. If you do not agree, you must stop using the Service.

9. Termination

You may stop using the Service at any time.

We may suspend, restrict, or terminate your access to the Service immediately if we reasonably believe you have violated these Terms, if required by law, or if needed to protect the Service, users, us, or third parties. We may also modify, suspend, or discontinue the Service or your access to it, in whole or part, at any time without prior notice.

If we discontinue a Service feature, we will try to provide reasonable advance notice where practicable, but urgent circumstances such as abuse prevention, security, operability, or legal requirements may make advance notice infeasible.

On termination, your right to use the Service ends. We may delete Content or data associated with your account. Sections 1.5, 1.6, 4 with respect to unpaid fees, 5, and 10 through 17 survive termination. If you believe your account was wrongly suspended or terminated, you may appeal through the in-product help entry.

10. Changes to the Service

We may modify, limit, suspend, or discontinue all or part of the Service, temporarily or permanently, at any time. We are not liable for any change, suspension, or discontinuation of the Service except to the extent required by law.

You should keep your own copies of Content where needed so you can access it if your access to the Service changes or ends.

11. Copyright and Intellectual Property Complaints

If you believe content on the Service infringes your intellectual property rights, submit a notice through the in-product help entry. Your notice should include enough information for us to identify the allegedly infringing material and your rights, including:

• a signature of the rights holder or authorized representative;
• a description of the protected work;
• the location of the allegedly infringing material in the Service;
• your contact details;
• a statement that you have a good-faith belief the use is unauthorized; and
• a statement, under penalty of perjury where applicable, that the information in the notice is accurate.

We may remove or disable allegedly infringing material and, where appropriate, terminate accounts of repeat infringers.

12. Privacy

Please read our Privacy Policy to understand how we collect, use, store, disclose, and otherwise process personal data.

13. Indemnification

To the maximum extent permitted by law, you will defend, indemnify, and hold harmless the Developer and its affiliates, directors, officers, employees, advisers, and agents from and against liabilities, claims, damages, costs, and expenses, including reasonable legal fees, arising out of or relating to:

• your unauthorized use or misuse of the Service;
• your breach of these Terms, any representation or warranty in these Terms, or applicable law; or
• any claim that your Input infringes, misappropriates, or violates a third party's intellectual property, publicity, privacy, confidentiality, or other rights.

We may assume the defense and control of any matter subject to indemnification at our expense, and you agree to cooperate.

14. Disclaimer

The Service and Output are provided "as is" and "as available". To the maximum extent permitted by law, we disclaim all warranties, express, implied, statutory, or otherwise, including warranties of merchantability, fitness for a particular purpose, title, quiet enjoyment, accuracy, availability, security, non-infringement, and warranties arising from course of dealing, usage, or trade.

We do not warrant that the Service or Output will be uninterrupted, secure, error-free, virus-free, accurate, current, complete, or that defects will be corrected. You use Output at your own risk.

Some jurisdictions do not allow certain disclaimers, so some or all of this section may not apply to you.

15. Limitation of Liability

15.1 No indirect damages

To the maximum extent permitted by law, the Developer and related parties will not be liable for indirect, incidental, special, consequential, exemplary, or punitive damages, or for lost profits, lost goodwill, lost data, or other intangible losses, arising out of or relating to these Terms, the Service, or Content, regardless of legal theory and even if advised of the possibility of such damages.

15.2 Liability cap

To the maximum extent permitted by law, the total aggregate liability of the Developer and related parties for all claims and losses arising out of or relating to these Terms, the Service, and Content is limited to the greater of:

• the amount you paid to us for the Service in the six months before the event giving rise to the claim; or
• USD 100 or the equivalent amount in Hong Kong dollars.

This limitation is essential to these Terms and applies even if a limited remedy fails of its essential purpose. Some jurisdictions do not allow certain limitations of liability, so some or all of this section may not apply to you.

16. Dispute Resolution

This section affects your rights. Please read it carefully.

16.1 Arbitration agreement

You and the Developer agree that any dispute, controversy, or claim arising out of or relating to these Terms or the Service, including its existence, validity, interpretation, performance, breach, or termination, will first be subject to the informal process in Section 16.3. If not resolved through that process, the dispute will be referred to and finally resolved by arbitration administered by the Hong Kong International Arbitration Centre under the HKIAC Administered Arbitration Rules in force when the notice of arbitration is submitted.

The seat of arbitration is Hong Kong SAR. The arbitration will be conducted by one arbitrator and in English.

If your claim qualifies, you may still bring an individual claim in a competent small-claims forum.

You may opt out of this arbitration agreement within 30 days of creating your account or within 30 days after any update to this arbitration agreement takes effect by sending written notice from the email address used to create your account.

16.2 No class or representative actions

You and the Developer agree to bring claims only in an individual capacity. You may not bring or participate in claims as a plaintiff or class member in any class, collective, consolidated, or representative proceeding. Unless both parties agree otherwise, the arbitrator may not consolidate claims or preside over any class, collective, or representative proceeding.

16.3 Pre-arbitration process

A party intending to seek arbitration must first send written notice of dispute to the other party through the in-product help entry. The notice must describe the nature of the claim and the relief sought. If the dispute is not resolved within 60 days after the notice is sent, either party may start arbitration.

16.4 Confidentiality and severability

The arbitration proceedings and any award are confidential, except as needed to enforce an award, exercise legal rights, comply with law, or as agreed by the parties.

If any provision of this section other than Section 16.2 is found invalid or unenforceable, it will be replaced by a valid provision closest to its intended effect and the rest of this section will remain in effect. If Section 16.2 is found invalid or unenforceable, the affected class or representative claims will proceed in the courts of Hong Kong SAR, and the rest of this arbitration agreement will remain in effect.

This section does not prevent either party from seeking urgent interim or injunctive relief from a competent court.

17. Miscellaneous

17.1 Entire agreement and language

These Terms, together with the Acceptable Use Policy, Privacy Policy, and any terms incorporated by reference, form the entire agreement between you and the Developer regarding the Service.

These Terms are provided in English as the authoritative version. If we provide a translation, it is for convenience only. If a translation conflicts with the English version, the English version controls.

17.2 Assignment, waiver, and severability

You may not assign or transfer these Terms or your rights or obligations without our prior written consent. We may assign these Terms and our rights and obligations, including rights related to Content, in connection with a business transfer, merger, acquisition, restructuring, or similar transaction, and you consent to that assignment in advance.

Our failure to enforce a provision is not a waiver. A waiver is effective only if made in writing. If a provision is invalid or unenforceable, it will be enforced to the maximum extent possible and the remaining provisions will remain in effect.

17.3 Governing law

These Terms are governed by the laws of Hong Kong SAR, without regard to conflict-of-law principles. Except as provided in Section 16, disputes arising out of or relating to these Terms or the Service are submitted exclusively to arbitration or courts in Hong Kong SAR.

17.4 Electronic communications

By using the Service, you consent to receive communications from us electronically. You agree that notices, agreements, disclosures, and other communications sent electronically satisfy any legal requirement that they be in writing.

17.5 Contact

You may contact the Developer, LI ENZENG, through the in-product help entry, or by email at support@worldku.com for general support, legal@worldku.com for legal notices, and privacy@worldku.com for privacy and data-rights requests.

17.6 No support obligation

We have no obligation to provide support for the Service. If we provide support, it is subject to the policies we publish or communicate.

17.7 Export and trade compliance

You must comply with all applicable trade, sanctions, and export-control laws. You may not use, benefit from, export, or re-export the Service in embargoed or restricted jurisdictions, or to restricted persons or entities. You may not use the Service for any prohibited end use, and your Input must not contain materials or information requiring government authorization for release, disclosure, or export.