Stefan
1e78d8114e
Make it explicit why dual licensing is NECESSARY (not optional): - App Store and Google Play terms are incompatible with GPL-3.0 - FSF considers App Store distribution a GPL violation - Mobile builds must exclude GPL code for platform compliance Also clarify: - Only copyright holder (KaProblem) can distribute proprietary mobile apps - Third parties cannot distribute GPL apps on app stores (platform restrictions) - Third parties cannot create proprietary versions from this code - Contributors grant dual licensing rights for App Store compliance Updates: - Add 'Why Dual Licensing?' section explaining App Store restrictions - Update copyright holder to KaProblem (https://www.kaproblem.com) - Add App Store compliance context throughout documentation - Clarify that this protects copyright holder's exclusive distribution rights This prevents: - Third parties from releasing proprietary mobile apps - Confusion about why dual licensing exists - GPL violations on app stores 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
99 lines
3.7 KiB
Plaintext
99 lines
3.7 KiB
Plaintext
Chess Tutor - AI-powered Chess Training Application
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Copyright (c) 2024 KaProblem (https://www.kaproblem.com / GitHub: stefan-kp)
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All rights reserved.
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================================================================================
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WHY DUAL LICENSING?
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================================================================================
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Apple's App Store and Google Play Store terms are INCOMPATIBLE with GPL-3.0:
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- App Store DRM conflicts with GPL's redistribution rights
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- Platform restrictions violate GPL's freedom requirements
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- FSF considers App Store distribution a GPL violation
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Therefore, we CANNOT distribute GPL apps on mobile app stores.
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Solution: Mobile builds exclude GPL code (Stockfish.js) and use API calls instead,
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allowing proprietary licensing for app store compliance.
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================================================================================
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IMPORTANT NOTICE REGARDING DUAL LICENSING
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================================================================================
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This software is available under DUAL LICENSING terms:
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1. GPL-3.0 License (Public Open Source Use)
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- Source code is licensed under GPL-3.0
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- You may use, modify, and distribute under GPL-3.0 terms
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- See LICENSE file for full GPL-3.0 text
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2. Proprietary License (Copyright Holder Only)
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- Only the copyright holder (KaProblem/stefan-kp) may distribute under proprietary terms
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- Specifically applies to mobile app distributions (iOS/Android)
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- Required for App Store/Google Play compliance
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- Third parties DO NOT have this right
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================================================================================
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THIRD PARTY RIGHTS AND RESTRICTIONS
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================================================================================
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If you are NOT the copyright holder, you must comply with GPL-3.0:
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✅ ALLOWED:
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- Use the software under GPL-3.0 terms
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- Modify and fork the source code
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- Distribute modified versions under GPL-3.0
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- Create web applications using this code (under GPL-3.0)
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❌ NOT ALLOWED:
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- Distribute proprietary (closed-source) versions
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- Create proprietary mobile apps for App Store/Google Play
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- Remove or bypass GPL requirements
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- Claim exclusive rights to the software
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================================================================================
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CONTRIBUTIONS
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================================================================================
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By contributing code, documentation, or other materials to this project, you:
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1. License your contributions under GPL-3.0 for public use
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2. Grant the copyright holder (KaProblem/stefan-kp) the right to use your
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contributions under ANY license, including proprietary licenses
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3. Represent that you have the legal right to make such grants
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4. Understand that the copyright holder may include your contributions
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in proprietary mobile app distributions for App Store/Google Play
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This dual licensing model is similar to those used by MySQL, Qt, and other
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successful open source projects.
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================================================================================
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DEPENDENCIES AND THIRD PARTY CODE
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================================================================================
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This software includes or depends on:
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- Stockfish.js (GPL-3.0) - Chess engine
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Used in web builds only, not included in mobile builds
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- Next.js (MIT License)
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- React (MIT License)
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- Chess.js (BSD License)
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- Other dependencies listed in package.json
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Mobile builds do NOT include GPL-licensed components and use a network API
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architecture instead, allowing proprietary distribution by the copyright holder.
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================================================================================
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For questions regarding licensing or to request a proprietary license,
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contact: KaProblem (https://www.kaproblem.com or stefan-kp via GitHub)
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Last Updated: 2024-12-07
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