Terms of Use

Last updated: 2026-10-29

Notice: Logic of Science is an assisted calculation and charting tool built on traditional classical rules combined with modern astronomical and calendrical algorithms. It converts birth time and similar inputs into traditional stem-branch calendar formats and matches them against rule texts. It is intended for enthusiasts to use for study, research and entertainment in compliance with these terms, and must not be used for any unlawful purpose. The app is intended for users aged 18 and over.

Welcome to Logic of Science (the "app"). These terms are an agreement between you and the app's operator ("we") about downloading, installing and using the app. Please read them carefully before use, especially the clauses that exclude or limit our liability or increase your obligations. By using the app you confirm that you have read and agree to all of these terms; if you do not agree, please stop using it.

1. The service

Logic of Science provides charting and assisted-reading tools for traditional Chinese metaphysics (Four Pillars, Qi Zheng Si Yu, Liu Yao). Some features require signing in with Google.

2. Nature of content and disclaimer

3. Account

Sign-in is handled by Google. Please keep your account and device secure; you are responsible for activity under your account. If someone else uses your account, handle it in your Google Account and sign out.

4. Acceptable use

You must not use the app to create, copy or spread content that: violates the constitution, laws or regulations; endangers national security, leaks state secrets or undermines national unity; harms national honor or interests; incites ethnic hatred or discrimination; promotes cults or superstition or disrupts public order; spreads rumors; spreads obscene, pornographic, gambling, violent or terrorist content or incites crime; insults or defames others or infringes their lawful rights; or is otherwise prohibited by law or regulation.

You must not use the app's results as a basis for any illegal or non-compliant activity, including but not limited to predicting stock or securities markets, giving financial investment advice, spreading securities trading information, or gambling.

You must not interfere with or disrupt the normal operation of the app, our servers or our network, or use the app to infringe the lawful rights of others.

5. Intellectual property and protection of rights

6. Privacy

We value and protect your privacy and handle your information in accordance with our Privacy Policy. We do not provide your information to unrelated third parties except: with your prior explicit authorization; as required by laws, regulations or competent authorities; or to protect the public interest. By using or continuing to use the app you agree to the Privacy Policy.

7. Legal liability and disclaimers

8. Changes to the service and these terms

As the business develops or laws change, we may adjust, suspend or end parts of the service and may amend these terms, publishing the latest version in the app or on this page, which counts as notice to you. If you do not accept the amended terms, please stop using the app; continued use means you accept them.

9. Governing law and disputes

The formation, validity, interpretation, performance and dispute resolution of these terms are governed by the law of the place where we (the operator) are located; where the law is silent, commercial or industry practice applies. Disputes arising from these terms or the use of the app should first be resolved by friendly negotiation; failing that, they shall be submitted to the court with jurisdiction at the operator's domicile. If any provision is held invalid or unenforceable, the remaining provisions stay in effect.

10. Contact

For questions, complaints or suggestions about these terms, email support@logic3451.com; we will reply promptly after verification.

Logic of Science · 中文 · support@logic3451.com