End User License Agreement (EULA)

ProntoGUI Desktop Application

Effective Date: July 17th, 2026 Version: 1.1

IMPORTANT — READ CAREFULLY

This End User License Agreement (”EULA” or “Agreement”) is a binding legal agreement between you (either an individual or the legal entity you represent, “you” or “Licensee”) and PRONTOGUI, LLC, a Michigan limited liability company (”ProntoGUI,” “we,” “us,” or “our”), governing your installation and use of the ProntoGUI desktop application software and any accompanying documentation (collectively, the “App”).

BY INSTALLING, COPYING, OR OTHERWISE USING THE APP, YOU AGREE TO BE BOUND BY THE TERMS OF THIS EULA. IF YOU DO NOT AGREE, DO NOT INSTALL OR USE THE APP.

This EULA supplements, and is subject to, our Terms and Conditions (the “T&C”), which is incorporated herein by reference. In the event of any conflict between this EULA and the T&C with respect to your installation and use of the App, this EULA controls.

1. Scope of This EULA

This EULA governs your use of the proprietary ProntoGUI desktop application (the “App”), which is the rendering component of the ProntoGUI framework.

This EULA does not apply to the ProntoGUI open-source Go library (”Golib”) or other ProntoGUI open-source components, which are distributed separately under the BSD-3-Clause license. Your use of those components is governed solely by their respective open-source licenses.

2. License Grant

Subject to your compliance with this EULA, ProntoGUI grants you a limited, non-exclusive, non-transferable, non-sublicensable, revocable, royalty-free license to install and use the App, at no charge, on devices you own or control, for any lawful purpose, including personal, evaluation, educational, and commercial purposes.

ProntoGUI may in the future offer separate paid offerings (for example, hosted services, support plans, or additional components) under separate terms. Unless and until you affirmatively agree to such separate terms, this EULA governs your use of the App on a free basis.

3. Restrictions

You may not, and you may not permit any third party to:

Copy, modify, adapt, translate, or create derivative works based on the App;
Reverse engineer, decompile, disassemble, or otherwise attempt to derive the source code, underlying ideas, algorithms, file formats, or protocols of the App, except to the extent expressly permitted by applicable law notwithstanding this restriction;
Rent, lease, lend, sell, sublicense, assign, distribute, publish, transfer, or otherwise make the App available to any third party;
Remove, alter, or obscure any proprietary notices (including copyright, trademark, or patent notices) on or in the App;
Use the App in any manner that violates applicable law or infringes the rights of any third party;
Use the App to develop a competing product; or
Circumvent, disable, or interfere with any license enforcement, authentication, or security mechanism of the App.

4. Ownership and Intellectual Property

The App is licensed, not sold. ProntoGUI and its licensors retain all right, title, and interest in and to the App, including all intellectual property rights. No rights are granted to you other than those expressly set forth in this EULA. All rights not expressly granted are reserved.

“ProntoGUI” and associated logos are trademarks of PRONTOGUI, LLC.

5. Updates

The App may from time to time download and install updates, including bug fixes, security patches, feature enhancements, or new versions. Such updates are considered part of the App and are subject to this EULA. ProntoGUI is not obligated to provide updates, maintenance, or support, and may discontinue the App at any time.

6. Third-Party Components

The App incorporates or is built using third-party components, including but not limited to the Flutter framework and the Dart programming language (trademarks of Google LLC). Your use of such components within the App is subject to the applicable third-party licenses. ProntoGUI is not endorsed by, affiliated with, or sponsored by Google LLC.

7. Data Collection and Privacy

The App may collect limited information necessary to deliver updates and provide support. Our collection and use of personal information is governed by our Privacy Policy, which is incorporated herein by reference.

8. Safety-Critical and High-Risk Use Prohibited

The App is not designed, tested, intended, or authorized for use in any application where failure, malfunction, or inaccuracy of the App could result in death, personal injury, or severe physical or environmental damage.

This includes, without limitation: medical devices or life-support systems; nuclear facilities; aircraft navigation, flight control, or air traffic control systems; weapons systems; autonomous vehicles; industrial control or safety systems where failure could endanger human life; and any other “high-risk activities.”

You assume all risk and liability for any such use, and you agree to indemnify, defend, and hold harmless ProntoGUI from any claims, damages, or liabilities arising from any such use.

9. Disclaimer of Warranties

THE APP IS PROVIDED “AS IS” AND “AS AVAILABLE,” WITH ALL FAULTS AND WITHOUT WARRANTY OF ANY KIND. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, PRONTOGUI DISCLAIMS ALL WARRANTIES, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, NON-INFRINGEMENT, ACCURACY, RELIABILITY, AND QUIET ENJOYMENT.

ProntoGUI does not warrant that the App will be uninterrupted, error-free, secure, or free of viruses or other harmful components, or that any defects will be corrected.

Some jurisdictions do not allow the exclusion of certain warranties, so some of the above exclusions may not apply to you.

10. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW:

IN NO EVENT SHALL PRONTOGUI, ITS AFFILIATES, OFFICERS, DIRECTORS, MEMBERS, EMPLOYEES, AGENTS, OR LICENSORS BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES, including but not limited to loss of profits, revenue, data, use, goodwill, business interruption, or other intangible losses, arising out of or relating to this EULA or your use of (or inability to use) the App, whether based on contract, tort (including negligence), strict liability, or any other legal theory, and whether or not ProntoGUI has been advised of the possibility of such damages.
PRONTOGUI’S TOTAL CUMULATIVE LIABILITY arising out of or relating to this EULA or the App, from all causes of action and under all theories of liability, SHALL NOT EXCEED U.S. $50.
These limitations are a fundamental basis of the bargain between you and ProntoGUI and shall apply even if any limited remedy fails of its essential purpose.

Some jurisdictions do not allow the exclusion or limitation of certain damages, so some of the above limitations may not apply to you.

11. Termination

This EULA is effective until terminated. It terminates automatically, without notice, if:

You breach any term of this EULA or the T&C; or
ProntoGUI discontinues the App.

Upon termination, you must cease all use of the App and uninstall and destroy all copies in your possession or control. Sections 3, 4, 8, 9, 10, 12, and 13 survive termination.

ProntoGUI may also terminate or suspend your license immediately if you engage in unauthorized or fraudulent use of the App.

12. Governing Law and Disputes

This EULA is governed by the laws of the State of Michigan, U.S.A., without regard to its conflict of laws principles. Any dispute arising out of or relating to this EULA or the App shall be resolved exclusively in the state or federal courts located in Michigan, and you consent to the personal jurisdiction of those courts.

As your business and user base grow, you may want to revisit this section and adopt more formal dispute-resolution provisions (e.g., mandatory arbitration, class-action waivers) — see the T&C for provisions that can be incorporated later.

13. General Provisions

Entire Agreement. This EULA, together with the T&C, constitutes the entire agreement between you and ProntoGUI regarding the App and supersedes all prior or contemporaneous communications.

Severability. If any provision of this EULA is held unenforceable, the remaining provisions shall remain in full force and effect.

No Waiver. Failure by ProntoGUI to enforce any right shall not constitute a waiver of that right.

Assignment. You may not assign or transfer this EULA without ProntoGUI’s prior written consent. ProntoGUI may assign this EULA without restriction.

Modifications. ProntoGUI may modify this EULA from time to time by posting an updated version. Your continued use of the App after such modifications constitutes acceptance of the updated EULA.

14. Contact

Questions about this EULA should be directed to:

PRONTOGUI, LLC P.O. Box 5 Hartland, MI 48353 United States Phone: (866) 314-1518 Email: support@prontogui.com Website: https://prontogui.com