Terms of Service
These Terms govern your access to and use of helisiapp lite, the website at helisiapp.com, and any related pages, tools, and content.
Last updated: July 15, 2026
These Terms of Service ("Terms") govern your access to and use of helisiapp lite (the "Service"), the website at helisiapp.com, and any related pages, tools, and content provided by it. The Service is operated by Geoffrey Campbell ("we," "us," or "our"). By accessing or using the Service, you agree to be bound by these Terms and by the Disclaimer and Privacy Policy, which are incorporated here by reference. If you do not agree to these Terms, do not use the Service.
1. Acceptance of these Terms
By loading, accessing, or using the Service in any way — including dismissing the entry disclaimer, entering a facility identifier, or viewing any output — you acknowledge that you have read, understood, and agree to be bound by these Terms. You also confirm that you have the legal capacity to enter into this agreement. If you are using the Service on behalf of an operator, employer, or other organization, you represent that you are authorized to accept these Terms on its behalf, and "you" refers to that organization as well.
2. Not an approved aviation weather source
The Service is provided for general informational and situational-awareness purposes only. You acknowledge and agree that:
- The Service is not an FAA-approved or FAA-certified source of weather information, is not a Qualified Internet Communications Provider (QICP), and is not an approved source for a preflight weather briefing.
- The ceiling and visibility figures the Service displays are estimates, mathematically derived from the elevation difference between your facility and a nearby reporting station. They are not measured, on-site observations of conditions at your facility, and actual conditions may differ materially.
- Some values (for example, CAPE) are model output, not observations. Model and other non-observational products may be unsuitable for flight planning and require training and expertise to interpret. They are provided for awareness only.
- The Service does not provide, and must never be used as, a source for navigation, tactical avoidance of weather or terrain, air traffic separation, approach minimums, or any operational go/no-go determination.
You must always obtain an official, approved weather briefing and consult official sources before any flight operation. Consistent with the Federal Aviation Regulations, the pilot-in-command is directly responsible for, and is the final authority as to, the safe operation of the aircraft. Nothing the Service displays reduces, replaces, or supplements that responsibility, and you agree that all operational decisions remain solely yours.
3. Eligibility and appropriate use
The Service is intended for use by aviation professionals and others who are qualified to interpret raw METAR and TAF data and understand its limitations. You agree to use the Service only as a planning aid that sits upstream of, and never as a substitute for, official weather sources and your own judgment.
4. Acceptable-use restrictions
You agree that you will not, and will not attempt to, and will not permit any third party to:
- use the Service for any unlawful purpose or in violation of these Terms;
- use the Service as an approved weather source, for navigation, or for any purpose prohibited by Section 2;
- send automated queries, scrape, crawl, or otherwise access the Service by any automated means beyond ordinary interactive use, or in a manner that exceeds, circumvents, or attempts to circumvent the Service's rate limits or other technical protections;
- interfere with, disrupt, overload, or impair the Service or the servers or networks it relies on, including the upstream data providers;
- probe, scan, or test the vulnerability of the Service, or breach or attempt to breach its security or authentication measures;
- reproduce, duplicate, copy, resell, republish, frame, mirror, or otherwise exploit the Service or its interface, design, or output for any commercial purpose without our prior written permission;
- remove, obscure, or alter any disclaimer, attribution, copyright notice, or other proprietary notice on the Service; or
- use the Service in any way that could damage, disable, or impair it, or interfere with any other party's use of it.
We may, at our sole discretion and without notice, limit, suspend, or block access to the Service (including by IP address or query pattern) to protect the Service, its data providers, or its users from abuse or excessive load.
5. Third-party data and links
The Service retrieves weather data from third-party sources, including aviationweather.gov (operated by the U.S. National Weather Service / Aviation Weather Center) and Open-Meteo. We do not control, produce, or independently verify that data, and we are not responsible for its accuracy, completeness, timeliness, or availability. Your use of third-party data may also be subject to the terms and licenses of those providers; Open-Meteo data is provided under CC BY 4.0 and is attributed accordingly on the Service. The Service may contain links to third-party websites; those sites are not under our control, and we are not responsible for their content, policies, or practices.
6. Availability, changes, and accuracy
The Service is provided on an "as available" basis. We do not guarantee that it will be available, uninterrupted, timely, secure, or error-free, and it may be unavailable at any time, with or without notice, including because an upstream data provider is unavailable, rate-limits us, or changes its interface. We may add, change, suspend, or discontinue any part of the Service — including features, thresholds, data sources, and these Terms — at any time and without notice or liability. Weather data and derived estimates may be delayed, incomplete, outdated, or incorrect. The absence of an alert, hazard, or flag is not an assurance that a hazard is absent. You are responsible for confirming the currency and validity of any information before relying on it, including by reading the raw report and its timestamp, which the Service always displays in full.
7. Intellectual property
The Service — including its software, source code, design, layout, text, graphics, logos, and the particular selection, arrangement, and presentation of data (but excluding the underlying third-party weather data itself) — is owned by Geoffrey Campbell and is protected by copyright and other intellectual property laws. © Geoffrey Campbell. All rights reserved. Subject to your compliance with these Terms, you are granted a limited, personal, non-exclusive, non-transferable, revocable license to access and use the Service for your own aviation-planning purposes. No other rights are granted, and all rights not expressly granted are reserved. "helisiapp" and "helisiapp lite" are marks of Geoffrey Campbell.
8. Disclaimer of warranties
To the fullest extent permitted by law, the Service and all content, information, estimates, forecasts, alerts, and output provided through it are provided "as is," "with all faults," and "as available," without warranties of any kind, whether express, implied, statutory, or otherwise. We expressly disclaim all such warranties, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, non-infringement, accuracy, and any warranties arising from a course of dealing or usage of trade.
Without limiting the foregoing, we do not warrant that the Service will be uninterrupted, timely, secure, or error-free; that any data, estimate, or forecast will be accurate, complete, current, or reliable; or that the Service is fit for any operational, navigational, or safety-of-flight purpose. You assume the entire risk arising out of your use of, or reliance on, the Service and its output.
9. Limitation of liability
To the fullest extent permitted by law, in no event will Geoffrey Campbell, or any affiliate, contributor, data provider, or licensor (collectively, the "Protected Parties"), be liable to you or any third party — whether in contract, tort (including negligence), strict liability, or under any other legal or equitable theory — for any indirect, incidental, special, consequential, punitive, or exemplary damages, or for any loss of profits, data, goodwill, or use, arising out of or relating to the Service or these Terms, even if the Protected Parties have been advised of the possibility of such damages.
Without limiting the foregoing, the Protected Parties will not be liable for any loss, damage, injury, or expense — including personal injury, death, or property damage — arising out of or relating to any flight operation, operational decision, or go/no-go determination made in connection with, or in reliance on, the Service or its output.
Because the Service is provided free of charge, the Protected Parties' total cumulative liability to you for all claims arising out of or relating to the Service or these Terms will not exceed one hundred U.S. dollars (US $100.00).
Some jurisdictions do not allow the exclusion or limitation of certain warranties or of incidental or consequential damages, so some of the above exclusions and limitations may not apply to you. In such cases, the Protected Parties' liability will be limited to the greatest extent permitted by law.
10. Indemnification
To the fullest extent permitted by law, you agree to indemnify, defend, and hold harmless the Protected Parties from and against any and all claims, demands, actions, losses, liabilities, damages, costs, and expenses (including reasonable attorneys' fees) arising out of or relating to: (a) your use of, or reliance on, the Service or its output; (b) any flight operation or operational decision made in connection with the Service; (c) your violation of these Terms; or (d) your violation of any law or the rights of any third party.
11. Governing law
These Terms are governed by the laws of the State of Ohio and the applicable federal laws of the United States, without regard to conflict-of-laws principles. You agree that the exclusive venue for any dispute not otherwise subject to another agreed process will be the state and federal courts located in Hamilton County, Ohio, and you consent to the personal jurisdiction of those courts.
12. Severability and waiver
If any provision of these Terms is held to be unenforceable or invalid, that provision will be limited or eliminated to the minimum extent necessary, and the remaining provisions will remain in full force and effect. Our failure to enforce any provision is not a waiver of our right to do so later.
13. Changes to these Terms
We may revise these Terms at any time by posting an updated version on the Service. Changes are effective when posted, and the "Last updated" date will reflect the most recent revision. Your continued use of the Service after any change constitutes your acceptance of the revised Terms. Because the Service uses no accounts and stores no personal data, we cannot notify you individually; you are responsible for reviewing these Terms periodically.
14. Entire agreement
These Terms, together with the Disclaimer and Privacy Policy, constitute the entire agreement between you and us regarding the Service and supersede any prior understandings on that subject.
15. Contact
Questions about these Terms may be sent to Geoffrey Campbell.