§ 01 1. Acceptance
These Terms of Use apply to the Atomurus app for Android. By installing or using the app you agree to them. If you do not agree, do not use the app and uninstall it. The atomurus.com website has its own Terms.
§ 02 2. What the app is
Atomurus is a free educational chemistry tool: periodic table, element pages, virtual lab, isomerism, calculators, 3D models and articles. The app has no sign-up or login, sells nothing, shows no ads and works offline.
§ 03 3. License
We grant you a free, personal, non-exclusive, non-transferable and revocable license to use the app on your devices for study, teaching (including in the classroom) and personal use. You may not:
- copy, redistribute, sell, rent or publish the app or its content as your own;
- reverse engineer, decompile or modify the app, except where the law expressly allows it;
- remove copyright, trademark or license notices;
- use the app for any unlawful purpose or to harm others.
§ 04 4. Educational content and simulations
Chemical data comes from reference sources such as IUPAC, NIST, CODATA and the CRC Handbook, cited on each page. Despite our care, content may contain errors or become outdated. The virtual lab is an educational simulation: volumes, masses, temperatures, pH and reactions use simplified models and approximate values. The app does not replace reference books, teachers or professional advice.
§ 05 5. Chemistry safety
Nothing in the app is an instruction to perform real experiments. Do not reproduce procedures outside a proper laboratory, without qualified supervision and protective equipment. The virtual lab catalog is deliberately limited and refuses hazardous substances, drugs and explosives. You alone are responsible for any practical activity you choose to carry out outside the app.
§ 06 6. Intellectual property
The texts, illustrations, design, code and the Atomurus brand belong to Atomurus. Third-party images (for example from Wikimedia Commons) and open-source libraries shipped in the app (such as three.js, Chart.js, Hammer.js, html2canvas, jsPDF and Capacitor) remain under their own licenses, credited on each page or in the libraries themselves.
§ 07 7. External links
Links to other websites open in your device's browser. We do not control those websites and are not responsible for their content, services or policies.
§ 08 8. Warranty and limitation of liability
The app is provided free of charge, as is, with no guarantee that it will always be available, error-free or fit for a particular purpose. To the fullest extent permitted by law, Atomurus is not liable for indirect damages, loss of data stored on your device or consequences of using the educational content. Nothing in these Terms limits your rights as a consumer under Brazil's Consumer Protection Code (Law 8,078/1990) or other laws that cannot be waived by contract.
§ 09 9. Privacy
The app does not collect or share personal data. Details are in the app Privacy Policy.
§ 10 10. Changes to the app and these Terms
We may update, change or remove features of the app. When these Terms change, the new version will be published on this page with the update date at the top. If a future version offers accounts, sync or purchases, those features will have their own terms, shown before you use them. You may stop using the app and uninstall it at any time.
§ 11 11. Governing law
These Terms are governed by the laws of the Federative Republic of Brazil. Where the law so provides, disputes are heard in the courts of the consumer's place of residence.
§ 12 12. Contact
Questions about these Terms: contato@atomurus.com.