ATMOSTROPIC WEB APPLICATION END USER LICENSE AGREEMENT

Last updated: September 9, 2026

IMPORTANT — EDUCATIONAL AND ENTERTAINMENT USE ONLY

Atmostropic is provided exclusively for education, personal learning, and entertainment. YOU MUST NOT USE THE APP OR ITS RESULTS IN ANY SITUATION WHERE AN ERROR, OMISSION, DELAY, INTERRUPTION, OR INCORRECT RESULT COULD CAUSE OR CONTRIBUTE TO ECONOMIC LOSS, DEATH, PERSONAL INJURY, OR DAMAGE TO PROPERTY. This prohibition applies to primary use, secondary checks, and use as one of several inputs to a decision. Independent checking does not authorize a prohibited use.

1. Agreement and scope

This End User License Agreement (“Agreement”) is between you and the copyright owner and provider of Atmostropic (“Provider”). It governs the Atmostropic web application, its browser-based and installed offline copies, calculators, results, documentation, reports, graphics, and updates (the “App”).

To use the calculators, review this Agreement, scroll to its end and select the acceptance button. Your acceptance of these dated terms is recorded only in your browser. Changed terms require acceptance again. If you do not agree, stop using the App and remove installed and cached copies under your control. You must have legal capacity to enter this Agreement or use the App with the authorization and supervision of a parent or legal guardian who accepts responsibility for your permitted use.

2. Permitted purpose and prohibited reliance

The App is solely an educational and entertainment demonstration of simplified mathematical models. It is not a certified calculation tool, flight instrument, navigation aid, or operational system. No other use is authorized by this Agreement.

YOU MUST NOT use, rely on, incorporate, or supply the App or its results for:

These restrictions apply even if you independently check the results or believe a result is correct. They prohibit use as a backup, cross-check, validation source, or component of a larger workflow for those purposes. Educational examples and simulations must remain separate from real-world decisions and operations carrying the prohibited risks.

If your intended use falls within these restrictions, DO NOT USE ATMOSTROPIC FOR THAT PURPOSE.

3. Limited license and ownership

The App is licensed, not sold. Subject to this Agreement, the Provider grants you a limited, nonexclusive, nontransferable license to use the App on devices you own or are authorized to use, solely for the purposes permitted by Section 2. You may retain browser-generated copies necessary for normal and offline operation and reproduce your results for permitted educational or entertainment activities, with their limitations made clear.

The Provider retains all rights, title, and interest in the App, including its name, branding, graphic design, original documentation, and underlying software, except for material owned by others. No ownership or trademark rights are transferred. All rights not expressly granted are reserved.

Without prior written permission, you may not modify, reproduce beyond the permission above, redistribute, sell, sublicense, or create derivative works of the App, or remove proprietary or limitation notices. You may not reverse engineer, disassemble, or attempt to derive nonpublic source code, except where applicable law permits this despite the restriction.

If particular source files or third-party components are supplied under an express separate license, that license governs those materials to the extent of a conflict. Making source code viewable does not itself grant additional rights. This Agreement does not revoke rights granted by separate open-source licenses or required by law.

4. Model limitations and reports

The App uses idealized models, fixed assumptions, approximations, and finite numerical precision. It does not measure actual conditions. Real atmospheric, fluid, material, and operating conditions can differ substantially. Results may contain errors, discontinuities, rounding effects, incorrect units, or other defects, including undiscovered defects.

Verification and validation reports describe only the implementations, data, versions, assumptions, and sampled conditions identified in those reports. They are not certification, a guarantee of accuracy, or authorization for any use prohibited by Section 2. Agreement with a reference does not establish suitability for real-world operation. Descriptions such as “verified” or “validated” do not expand permitted use or create a warranty.

5. Browser operation, offline copies, and updates

Availability depends on your browser, device, network, and hosting services. Offline operation requires an initial download and successful caching. Browser restrictions, storage eviction, or clearing site data can remove cached files. A home-screen shortcut does not guarantee offline availability.

Cached copies may remain outdated and may not receive corrections promptly. The Provider does not promise uninterrupted access, compatibility, maintenance, support, updates, or correction of every defect. Subject to applicable law, the Provider may change, suspend, or discontinue the App or its features. These limitations do not reduce the restrictions in Section 2.

6. External websites and third-party materials

Links to independent websites, reference publications, and educational resources are provided for convenience and information. The Provider does not control or guarantee their content, accuracy, security, availability, products, services, or privacy practices and has no obligation to monitor or update them.

To the extent permitted by law, you use those websites at your own risk and the Provider is not responsible for losses arising from them. Review their own terms and privacy statements. A link does not imply endorsement by the Provider or that a third party endorses, sponsors, certifies, or is affiliated with Atmostropic. External websites are not included in the App's offline copy.

7. Privacy

Data handling and browser storage are addressed separately in the App's Privacy Policy, available through Legal. This Agreement does not itself authorize collection, sale, or sharing of personal information or grant consent to tracking. Any consent required by law must be obtained separately.

8. AS IS — No warranty

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE APP, ITS SOFTWARE, DOCUMENTATION, AND RESULTS ARE PROVIDED “AS IS” AND “AS AVAILABLE,” WITH ALL FAULTS AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED, OR STATUTORY. THE PROVIDER AND COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES AND CONDITIONS, INCLUDING ACCURACY, COMPLETENESS, RELIABILITY, MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT, AND NONINFRINGEMENT.

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE PROVIDER AND COPYRIGHT HOLDERS SHALL NOT BE LIABLE FOR ANY CLAIM, DAMAGES, OR OTHER LIABILITY ARISING FROM OR CONNECTED WITH THE APP, ITS USE, OR OTHER DEALINGS IN IT, WHETHER IN CONTRACT, TORT, OR OTHERWISE. THIS DISCLAIMER IS SUBJECT TO THE MANDATORY-RIGHTS EXCEPTIONS IN SECTION 9; IT DOES NOT EXCLUDE LIABILITY THAT THE LAW DOES NOT ALLOW TO BE EXCLUDED.

The Provider does not warrant that the App or its results will meet your requirements, be error-free, operate without interruption, or be suitable for any activity involving economic or physical risk. No report, example, support response, or other oral or written information creates an additional warranty to the extent permitted by law. Subject to mandatory legal rights, you bear the costs of resolving problems arising from your use.

9. Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE PROVIDER IS NOT LIABLE FOR PERSONAL INJURY, DEATH, PROPERTY DAMAGE, OR INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES ARISING FROM OR RELATED TO THE APP, ITS RESULTS, EXTERNAL LINKS, OR YOUR USE OF OR INABILITY TO USE THEM. THIS INCLUDES LOSS OF PROFITS, REVENUE, BUSINESS, OPPORTUNITY, DATA, OR GOODWILL, BUSINESS INTERRUPTION, AND COSTS OF SUBSTITUTE TOOLS OR SERVICES.

To the maximum extent permitted by applicable law, the Provider's total aggregate liability arising from or related to the App and this Agreement will not exceed fifty United States dollars (US $50). These exclusions and the cap apply regardless of legal theory, including contract, negligence, or other tort, even if the Provider was advised of the possibility of loss and even if a limited remedy fails of its essential purpose.

NOTHING IN THIS AGREEMENT EXCLUDES OR LIMITS LIABILITY THAT CANNOT LAWFULLY BE EXCLUDED OR LIMITED, INCLUDING LIABILITY FOR FRAUD, WILLFUL MISCONDUCT, GROSS NEGLIGENCE, OR DEATH OR PERSONAL INJURY CAUSED BY NEGLIGENCE WHERE APPLICABLE LAW PROHIBITS SUCH EXCLUSION OR LIMITATION. Nothing waives mandatory consumer rights or remedies. Where a jurisdiction does not permit a disclaimer, exclusion, or cap, it applies only to the extent legally permitted.

10. Responsibility for prohibited use

You are responsible for complying with the permitted-use restrictions. To the extent permitted by applicable law, you agree to indemnify the Provider against third-party claims, damages, and reasonable legal costs caused by your knowing use of the App in breach of Section 2 or your unlawful redistribution of it. This obligation does not cover losses caused by the Provider's own negligence or other wrongful conduct and does not override mandatory consumer protections.

11. Termination

You may terminate this Agreement by ceasing use and removing copies of the App under your control. Subject to applicable law, your license ends automatically if you breach its terms. On termination, stop using the App and remove installed and cached copies using your browser's site-data controls; removing a home-screen icon alone may not remove them.

Provisions concerning ownership, prohibited reliance on retained results, warranty exclusions, liability, and responsibility for prohibited use survive termination to the extent necessary to give them effect and permitted by law. Separately licensed materials remain governed by their own licenses.

12. Applicable law, changes, and general terms

You must comply with laws applicable to your use, including applicable export-control and sanctions laws. This Agreement does not displace mandatory laws or consumer protections that apply where you live. It does not select an exclusive court or require arbitration.

Revised terms will carry an updated date and be made available with the App. Material changes will be brought to your attention and consent obtained where required by law; posting alone does not retroactively change accrued rights. If you do not agree to applicable revised terms, stop using the App.

If a provision is unenforceable, the remaining provisions continue to apply to the extent permitted by law. Failure to enforce a provision is not a waiver. This Agreement governs the App's permitted use and replaces earlier App license terms prospectively, subject to mandatory law and express separate licenses. The Privacy Policy remains a separate document.

13. Contact

Use the Support tab in Atmostropic information for support, privacy requests and legal questions. A network connection and an enabled support service are required.