Third-party licenses

Last updated: June 22, 2026. Effective: July 22, 2026.

1. Overview

The Everfur mobile applications and related services provided by Strand Health Inc., doing business as Everfur ("Company"), incorporate certain third party software libraries, open source components, and licensed content. This document provides attribution and license information for such components as required by their respective license terms.

The inclusion of third party software in our applications does not imply endorsement, sponsorship, affiliation, or partnership by or with the authors, maintainers, or organizations associated with such software. Third party components are provided "as is" and are subject to their respective license terms, not to the Company's warranty disclaimers or limitation of liability provisions, except to the extent those third party license terms disclaim warranties and limit liability on their own terms.

2. Open Source Licenses

The following open source licenses apply to components used in the Everfur applications. The specific components governed by each license, including version numbers, are listed in our in app license viewer (accessible via Settings > About > Licenses) and are updated with each application release.

2.1 MIT License

A number of components used in the Everfur applications are licensed under the MIT License. The MIT License permits use, copy, modification, merger, publication, distribution, sublicensing, and sale of copies of the software, subject to the inclusion of the original copyright notice and permission notice in all copies or substantial portions of the software. THE SOFTWARE IS PROVIDED "AS IS," WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

2.2 Apache License, Version 2.0

Certain components used in the Everfur applications are licensed under the Apache License, Version 2.0. The Apache License grants a perpetual, worldwide, non exclusive, no charge, royalty free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute the work and derivative works thereof, subject to the conditions specified in the license, including the requirement to include a copy of the license, a NOTICE file with attribution, and to mark modified files. The Apache License also includes an explicit patent grant from contributors to users.

2.3 BSD Licenses (2 Clause and 3 Clause)

Certain components are licensed under the BSD 2 Clause ("Simplified") or BSD 3 Clause ("New" or "Revised") licenses. These licenses permit redistribution and use in source and binary forms, with or without modification, subject to the conditions specified in the respective license, including retention of copyright notices, reproduction of the license in documentation, and (in the 3 Clause variant) prohibition of use of the project name for endorsement without permission. Both variants include warranty disclaimers.

2.4 ISC License

Certain components are licensed under the ISC License, which permits use, copy, modification, and distribution of the software for any purpose with or without fee, subject to the inclusion of the copyright notice and permission notice. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE.

2.5 Mozilla Public License 2.0 (MPL 2.0)

Certain components may be licensed under the Mozilla Public License 2.0, which permits use, modification, and distribution of covered software subject to its terms, including the requirement to make source code of modifications to MPL covered files available under the MPL. The MPL 2.0 is a "weak copyleft" license that requires disclosure of modifications to MPL licensed files but does not require the entire application to be released under the MPL.

2.6 Creative Commons Licenses

Certain non code assets (documentation, data files, or reference materials) incorporated in or accessed through the Services may be licensed under Creative Commons licenses, including CC BY 4.0 (Attribution), CC BY SA 4.0 (Attribution ShareAlike), or CC0 (Public Domain Dedication). Specific Creative Commons licensed materials and their applicable license terms are identified in the in app license viewer.

2.7 SIL Open Font License 1.1

Certain font files used in the Everfur applications may be licensed under the SIL Open Font License 1.1, which permits use, study, copy, merge, embed, modify, redistribute, and sell modified and unmodified copies of the font software, subject to certain conditions including that the font software is not sold by itself and that the original copyright notice is included.

3. Core Framework Attribution

3.1 React Native

The Everfur mobile applications are built using React Native, which is licensed under the MIT License. React Native is developed and maintained by Meta Platforms, Inc. and a community of contributors.

3.2 Expo

The Everfur mobile applications use the Expo framework (SDK 54), which is licensed under the MIT License. Expo is developed and maintained by 650 Industries, Inc.

3.3 Additional Core Dependencies

The following significant frameworks and libraries are used in the Everfur applications (this is a representative sample; the complete list is available in app):

Zustand (state management) under MIT License. TanStack Query (data fetching and caching) under MIT License. React Navigation (navigation) under MIT License. Expo modules and SDK components under MIT License. PostHog React Native SDK (analytics) under MIT License. Various Expo community modules under MIT License.

4. Licensed Content Attribution

Certain clinical reference content, drug information, veterinary literature abstracts, and clinical practice guidelines displayed within the Services are used under license from third party publishers, content providers, and academic institutions. Licensed content remains the exclusive intellectual property of the respective licensors and is used in accordance with the applicable license agreements (including text and data mining agreements where applicable). Specific content attributions are displayed alongside the licensed content within the Services where required by the applicable license terms.

Licensed content providers may include (without limitation): Wiley and affiliated imprints, for veterinary journal content accessed under TDM license; and other veterinary content publishers and database providers.

The Company's use of licensed content does not grant users any right to reproduce, distribute, download, cache, or create derivative works from such content beyond the scope of use authorized by the Terms of Service.

5. Third Party Service Attribution

The Services integrate with third party services whose own terms of service and privacy policies govern your use of those services. These third party services include but are not limited to:

Payment Processing. Stripe, Inc. (payment processing, invoicing, and subscription billing). Apple Pay (in app payments on iOS). Google Pay (in app payments on Android).

Cloud Infrastructure. Microsoft Azure (cloud hosting, compute, storage, and managed services).

Analytics and Monitoring. PostHog (product analytics and event tracking). Firebase (crash reporting and performance monitoring via Crashlytics).

Mapping and Geolocation. Google Maps Platform or Apple MapKit (mapping, geocoding, and location services).

Push Notifications. Expo Push Notification Service, Apple Push Notification Service (APNs), and Firebase Cloud Messaging (FCM).

Authentication. Apple Sign In and Google Sign In (third party authentication).

App Distribution. Apple App Store and Google Play Store (application distribution and in app purchases).

Use of these third party services is subject to their respective terms of service, privacy policies, and acceptable use policies. The Company is not responsible for the practices or policies of third party service providers.

6. Complete License List

A complete, machine readable list of all third party dependencies, their versions, their authors, and their applicable licenses is available in the application at Settings > About > Licenses. This list is generated automatically from our dependency manifest (package.json, Podfile.lock, build.gradle) and is updated with each application release. The in app license viewer allows you to search, filter, and view the full text of each applicable license.

7. Source Code Availability

To the extent required by applicable open source license terms (such as the LGPL or MPL), we will make available the source code of modified open source components upon written request to legal@everfur.com. Source code requests will be fulfilled within thirty (30) days and may be subject to a reasonable media and handling fee not exceeding the cost of distribution. This offer is valid for three (3) years from the date of distribution of the applicable application version.

8. License Compliance Inquiries

If you are an author, maintainer, or rights holder of an open source component used in the Everfur applications and believe that your license terms have not been properly satisfied, or if you have any questions about our use of open source software, please contact us at legal@everfur.com. We are committed to complying with all applicable open source license obligations and will promptly investigate and address any compliance concerns.

9. No Implied Licenses

Nothing in this document or in the Services grants any implied license to use, modify, distribute, reverse engineer, or derive works from the Company's proprietary software, AI models, algorithms, knowledge graph, training data, model weights, or any other proprietary technology. Open source license terms apply only to the specific third party components governed by those licenses and do not extend to the Company's proprietary technology, even when proprietary components interact with or depend on open source components.

10. Contact Information

Strand Health Inc.
d/b/a Everfur
1002 Dean Street, Suite 101, Brooklyn, NY 11238
Email: legal@everfur.com