Terms of Service

Effective date: 2025-08-19
Legal entity: Beijing Huiduoxing Technology Co., Ltd., registered in China. ("Knowfun," "we," "us," or "our").

By accessing or using Knowfun's website(s), applications, APIs, documentation, models, and related tools (collectively, the "Service"), you agree to these Terms of Service (the "Terms"). If you are accepting on behalf of an entity, you represent that you have the authority to bind that entity. If a separate written agreement (e.g., MSA) governs your use, it controls to the extent of any conflict.

1. Access & Use

1.1 License

Subject to these Terms, we grant you a limited, revocable, non-exclusive, non-transferable right to access and use the Service for educational content creation.

1.2 Your Content

You may provide inputs, data, files, prompts, or instructions ("Inputs") and receive outputs, recommendations, or other results ("Outputs"). Together, Inputs and Outputs are "Content." You are responsible for your Content and represent that you have the rights and permissions necessary for us to process it to provide the Service.

1.3 Model Training

By default, Knowfun will NOT use Content to train models.

1.4 Limitations of AI Outputs

Outputs may be inaccurate, incomplete, biased, or inappropriate for your use case. You must evaluate and verify Outputs before relying on them—especially for decisions in medical, legal or financial areas. You bear all risk from use of Outputs.

1.5 Use Restrictions

You will not, and will not permit others to:

  • reverse engineer, copy, or create derivatives of the Service;
  • try to extract or reconstruct models;
  • probe or disrupt the Service;
  • scrape or harvest data;
  • violate law or third-party rights;
  • upload data requiring special security by law (e.g., PHI, PCI) unless we explicitly agree in writing.

1.6 Beta/Pre-release Features

We may label features as beta, experimental, or early access; they are provided "as is," may change or discontinue, and may lack support.

2. Eligibility

You must be at least the age of majority in your jurisdiction, whichever is higher, and legally able to enter into a contract. You confirm your use complies with applicable laws where you use the Service.

3. Accounts & Security

Provide accurate registration details and keep them current. You are responsible for activity under your account and for safeguarding credentials.

4. Fees, Billing & Subscriptions (if applicable)

4.1 Paid Features

Some features require payment. You'll see pricing before purchase. Currency is in US dollars USD$.

4.2 Pricing Changes

We may change prices with prior notice through the Service or email. Continued use after the effective date indicates consent.

4.3 Payment Processing

Payments may be processed by Paddle and are subject to their terms.

4.4 Auto-Renewing Subscriptions

If you purchase a subscription, it auto-renews for the same term unless canceled at least 24 hours before renewal via the cancellation path. Taxes/fees will be billed to your saved method.

4.5 Add-Ons / Usage-Based

Some features may be usage-metered or optional add-ons as described in your account/billing pages.

4.6 Delinquency

We may suspend or terminate for unpaid amounts and assess reasonable collection charges.

5. Ownership & Licenses

5.1 Service

We and our licensors own all rights in the Service. No rights are granted except as expressly stated.

5.2 Feedback

If you submit feedback or suggestions, we may use them without restriction or payment.

5.3 Usage Data

We may collect and analyze technical usage data to operate, secure, and improve the Service; any disclosures will be aggregated/de-identified.

6. Third-Party Services & Integrations

Optional third-party extensions or integrations are governed by their own terms. We make no warranties about third-party services.

7. Communications

We may send you service and promotional messages. You can opt out of marketing via the unsubscribe method via email: support@knowfun.io.

8. Changes to These Terms

We may update these Terms by posting a revised version and updating the "Effective date." Material changes will be reasonably notified. Continued use means acceptance. If you disagree, stop using the Service.

9. Suspension & Termination

You may stop using the Service anytime. We may suspend, limit, or terminate access (e.g., for misuse, security, legal compliance, or non-payment).

10. Service Modifications

We may modify or discontinue features at any time. Keep your own backups of important Content.

11. Privacy

See our Privacy Policy for how we collect, use, and disclose personal data.

12. Indemnity

To the fullest extent allowed by law, you agree to defend, indemnify, and hold harmless Knowfun and its affiliates, officers, employees, and agents from claims and costs arising from: (i) your misuse of the Service or Outputs; (ii) your violation of these Terms or law; or (iii) your Content infringing others' rights.

13. Disclaimer of Warranties

The Service and Outputs are provided "AS IS" and "AS AVAILABLE." We disclaim all warranties (express, implied, or statutory), including merchantability, fitness for a particular purpose, and non-infringement. We do not warrant uninterrupted, secure, or error-free operation or that issues will be corrected.

14. Limitation of Liability

To the maximum extent permitted by law:

  • No indirect damages. We won't be liable for indirect, incidental, special, consequential, or punitive damages, or lost profits, data, or goodwill.

15. Miscellaneous

  • Entire Agreement. These Terms (and documents referenced) are the entire agreement.
  • Assignment. You may not assign without our consent; we may assign.
  • Severability; Waiver. Unenforceable terms are modified to be enforceable; failure to enforce isn't a waiver.
  • Electronic Communications. You consent to receive notices electronically by support@knowfun.io.
  • Export Controls. You must comply with applicable export/sanctions laws.

16. Contact

Knowfun – Legal/Support

KnowFun - AI-Powered Learning Platform