ARGONCAKECALC COMMERCIAL SOURCE-AVAILABLE LICENSE Version 1.0 — 2026-10-31 Copyright (C) 2026 Ivan Voitkov Author website: https://argon-studio.ru/ Project repository: https://github.com/Argonstudio/ArgonCakeCalc This license applies to the ArgonCakeCalc application code and documentation created for this project. Third-party components, including bundled fonts, are licensed separately; see THIRD_PARTY.md and the notices distributed with them. 1. Definitions “Software” means ArgonCakeCalc, including its source code, standalone HTML build, documentation, tests and other files identified as part of this project. “Licensor” means Ivan Voitkov, unless a written notice in the repository names another copyright holder for a specific component. “Licensee” means the person or organization that receives a valid license. “License Fee” means a payment of at least the equivalent of 1 USD, or a higher amount chosen by the payer, made through the official payment page identified in the project documentation or shop page. 2. License grant After the License Fee has been successfully paid and while this license is followed, the Licensor grants the Licensee a non-exclusive, worldwide, non-transferable license to: * download and install the Software; * run the Software for personal or internal business work; * make reasonable private modifications needed for that work; and * keep archival copies for the Licensee’s own use. If an organization purchases the license, its employees and contractors may use the Software for that organization’s internal work while acting on its behalf. 3. Source availability and evaluation period The source code may be publicly visible on GitHub for transparency, review and community feedback. Public visibility does not grant permission to use, compile, deploy, modify for distribution, sublicense or redistribute the Software without a valid license under this agreement. Before payment, a person may download and use the full Software free of charge for one (1) month solely to evaluate its functionality and fitness for their purposes. After that evaluation period, continued personal or internal business use requires a paid license. This evaluation permission is a limited trial, not a transfer of ownership or a permission to redistribute the Software. 4. Restrictions Without the Licensor’s prior written permission, the Licensee may not: * sell, rent, sublicense, publish or redistribute the Software or a modified version of it; * offer the Software as a hosted service or include it in a product distributed to third parties; * remove or obscure copyright, license, author or origin notices; or * represent a modified version as an official release of ArgonCakeCalc. A modification made only for the Licensee’s private or internal work does not need to be published, but all applicable notices must remain intact. 5. Payment, trial, support and refund policy Before payment, the Licensee may use the full Software free of charge for one (1) month to evaluate it. The Software is available immediately and payment is not required to download or open it during the evaluation period. After the trial, continued personal or internal business use requires a paid license. The payer chooses the License Fee, starting at the equivalent of 1 USD, and confirms the amount before completing the payment. Because the Software and its full functionality are available before payment, payment is an intentional license decision made after evaluation. A payment of any amount selected by the payer, including an amount higher than the payer later expected, is not treated as an accidental payment solely because the payer changed their mind. Once payment is successfully completed, the non-exclusive license is deemed granted immediately. No activation key, account approval or additional delivery is required. The current payment link and seller information are published in the README and on the shop page. A payment receipt or provider confirmation is evidence of the License Fee; it does not replace this license or any mandatory rights. The License Fee is not refundable solely because the Licensee changed their mind, selected a larger amount or no longer wants to use the Software. A claim may be sent to voit.ne@gmail.com for a duplicate charge, a payment-system technical error, or another case where a refund is required by applicable law. The request should include the payment date, amount, payer e-mail and Robokassa transaction ID. Nothing in this license excludes rights that cannot lawfully be excluded or limits the payment provider's mandatory procedures. 6. Termination This license ends automatically if the Licensee materially breaches it. On termination, the Licensee must stop using and distributing the Software and, except where retention is required by law, delete working copies. Termination does not remove rights or remedies that accrued before termination. 7. No warranty and limitation of liability THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, TO THE MAXIMUM EXTENT PERMITTED BY LAW. The Licensor does not warrant that the Software will meet the Licensee’s expectations, business processes or particular business purpose. The Licensee is solely responsible for checking the Software before payment and for deciding whether it is suitable for their work. To the maximum extent permitted by law, the Licensor is not liable for any loss or damage to the Licensee’s business, revenue, profit, data, reputation or operations, or for any direct, indirect, incidental, special or consequential damages arising from use of, reliance on, or inability to use the Software. Mandatory statutory rights remain unaffected. 8. Changes and future versions The Licensor may publish newer versions of this license for future releases. A release is governed by the license file distributed with that release unless it expressly says otherwise. 9. Acceptance Use during the one-month evaluation period indicates acceptance of the trial conditions. Payment of the License Fee indicates that the payer has evaluated or had the opportunity to evaluate the Software, selected the payment amount voluntarily and accepts this license. If the Licensee does not accept it, the Licensee must not continue personal or internal business use after the trial or distribute the Software. This document is a software license template for this project, not legal advice. Before commercial launch, verify the public offer, tax wording, payment flow and mandatory consumer protections with a qualified Russian lawyer.