Open Source and Third-Party Notices
Last updated: September 30, 2026
GemuZen is developed by GemuZen Studio, the trading name of Taleh Sadıqov, and is built with the help of open-source software and licensed creative assets. We are grateful to their authors. This page lists the main components, their licences and where to find the full licence texts. All rights in these components remain with their respective owners.
If you believe a component or attribution is missing or incorrect, please write to info@gemuzen.com and we will correct it.
1. Software Components
| Component | Used for | Licence |
|---|---|---|
| Capacitor (@capacitor/core, @capacitor/android, @capacitor/cli) and official plugins (App, Browser, Haptics, Local Notifications, Share) | Running the game as a native mobile app | MIT Licence — licence text |
| @capacitor-community/admob | Advertising integration | MIT Licence — licence text |
| @capacitor-community/in-app-review | System review prompt | MIT Licence — licence text |
| Firebase JavaScript SDK (Authentication, Firestore) | Anonymous sign-in, cloud save, leaderboards | Apache Licence 2.0 — licence text |
| Firebase Android SDKs (Analytics, Crashlytics) | Usage analytics and crash reporting | Firebase / Google APIs Terms of Service — terms; open-source parts under Apache Licence 2.0 |
| @capacitor-firebase/analytics and @capacitor-firebase/crashlytics (Capawesome) | Connecting the game to Firebase Analytics and Crashlytics | Apache Licence 2.0 (Copyright 2022 Robin Genz) — licence text |
| Google Mobile Ads (AdMob) SDK and User Messaging Platform | Rewarded advertisements and consent messages | Google Terms of Service and SDK terms — terms |
| AndroidX Media3 (ExoPlayer) | Playing the background music on Android | Apache Licence 2.0 — licence text |
| AndroidX (Jetpack) libraries and Kotlin standard library | Android app infrastructure used by the components above | Apache Licence 2.0 — licence text |
| Google Play In-App Review library | Showing Google Play's system review prompt | Play Core Software Development Kit Terms of Service — terms |
| Android SDK and related Google Play services libraries | Android platform support | Android Software Development Kit Licence Agreement |
2. Fonts
| Font | Used for | Licence |
|---|---|---|
| Inter (Rasmus Andersson and contributors) | All text in the game and on this website (served from our own server) | SIL Open Font License 1.1 — licence text |
3. Images, Illustrations and Audio
| Source | Used for | Terms |
|---|---|---|
| Freepik (including icons by the contributor rawpixel.com on Freepik) | A small number of icons, modified by us | Freepik licence |
| Pixabay | Sound effects | Pixabay Content Licence |
| Vecteezy | A small number of icons, modified by us | Vecteezy licence |
| Flagpedia (flagpedia.net) | Country flag images | Public domain flag artwork, based on Wikimedia Commons files |
| Content | Source | Terms |
|---|---|---|
| Collectible card artwork | Created by GemuZen Studio (own graphics, partly generated with AI tools and then edited by us) | Owned by GemuZen Studio |
| Logo and app icon | Designed by GemuZen Studio | Owned by GemuZen Studio |
| Background music | Generated with Google's generative AI music tools, then selected, edited and arranged by GemuZen Studio | Used under the terms of the Google service used to create it; not presented as a human composition |
Parts of the artwork and interface text were also created or refined with the assistance of artificial intelligence tools, as described in our Copyright Notice. Selection, review and integration were carried out by GemuZen Studio.
4. Full Licence Texts
The components marked "MIT Licence" above are distributed under the following licence, with the copyright notices of their respective authors shown in each component's licence file (linked above):
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included 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. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
The Apache Licence 2.0 is available at apache.org/licenses/LICENSE-2.0 and the SIL Open Font License 1.1 at openfontlicense.org. The full text of each licence is also available at the links above. We can also provide a complete copy of the licence texts and copyright notices for the components included in the released version of the Game; simply write to info@gemuzen.com and we will send them to you free of charge.
5. Our Own Content
All other content in GemuZen, including gameplay design, original artwork, collectible cards, interface design, music selection, branding and source code written by us, belongs to GemuZen Studio and is not open source. Please see our Copyright Notice for what you may and may not do with it.
6. Contact
GemuZen Studio — the trading name of Taleh Sadıqov, an individual developer
Republic of Azerbaijan
Email: info@gemuzen.com
Website: gemuzen.com