Terms of Service

1. Acceptance of Terms

By accessing and using Mathorio, you accept and agree to be bound by the terms and provisions of this agreement.

2. Description of Service

Mathorio provides free interactive math lessons, practice problems, tools, and quizzes for students, adult learners, parents and teachers. Our service includes educational content in multiple languages.

3. User Accounts

To access certain features, you may need to create an account. You are responsible for maintaining the confidentiality of your account credentials and for all activities under your account.

4. Acceptable Use

You agree not to:

• Use the service for any unlawful purpose
• Attempt to gain unauthorized access to our systems
• Interfere with other users' use of the service
• Upload malicious content or spam
• Violate any applicable laws or regulations

5. Intellectual Property

All content on Mathorio, including lessons, graphics, and software, is owned by Mathorio or its licensors and is protected by intellectual property laws.

6. User Content

By submitting content to Mathorio, you grant us a non-exclusive, royalty-free license to use, display, and distribute that content in connection with our services.

7. Disclaimer of Warranties

The service is provided "as is" without warranties of any kind. We do not guarantee that the service will be uninterrupted or error-free.

8. Limitation of Liability

Mathorio shall not be liable for any indirect, incidental, special, or consequential damages arising from your use of the service.

9. Changes to Terms

We reserve the right to modify these terms at any time. Continued use of the service after changes constitutes acceptance of the new terms.

10. Governing Law

These terms shall be governed by and construed in accordance with the laws of the European Union.

11. Contact

For questions about these terms, please contact us at legal@mathorio.com.

12. Premium

Premium is an optional paid plan. It removes ads, lifts the daily limits on practice problems, quizzes and games, and adds extras such as the mistake notebook, a full year of progress and style options. It never locks lessons: every lesson stays free. Plans and prices are shown on the Premium page before you buy.

Payments are handled by our reseller, Lemon Squeezy, who acts as the merchant of record: they process the payment, add sales tax or VAT where it applies, send your receipt and handle billing questions under their own terms. We never see your card details. Monthly and yearly plans renew automatically until you cancel. You can cancel at any time with "Manage subscription" on the Premium page or in Settings; Premium then stays active until the end of the period you paid for. A free trial, when offered, turns into a paid plan at its end unless you cancel before. Lifetime is a one-time payment for Premium as long as Mathorio offers it. Refunds follow Lemon Squeezy's refund policy and the consumer rights that apply where you live.