oyna.app

Contact

To reach oyna.app, write to this e-mail address.

oyna.app’s e-mail address

iletisim@oyna.app

Write an e-mail

The site has no contact form: please write from your own e-mail.

What you can write about

  • Questions and suggestions.
  • A bug report: tell us the game, the device and what happened.
  • Your account and data, for example deleting your account and its data, or asking what we keep about you. We answer such requests within 30 days at the latest.
  • An objection to a suspended account.
  • Official notices, for example a court or authority decision: they can be sent to this address.

oyna.app is free and for entertainment. There are no sales, ads or paid features. Credits have no money value: they cannot be bought, sold or exchanged for money.

Licences and attributions

Some of the art, fonts and software on oyna.app come from others and are used under these licences.

The table images, the game covers and Tavla’s 3D models are oyna.app’s own work.

Art

  • Fortuna Mahjong’s Riichi jade tiles: adapted from artwork by FluffyStuff and xhokir, as distributed with Mah – Mahjong Solitaire.

    Licence: CC BY 4.0 Source: FluffyStuff/riichi-mahjong-tiles, xhokir/riichi-mahjong-tiles, ffalt/mah

  • Fortuna Mahjong’s Classic ivory and High contrast tiles: adapted from the public-domain mahjong tile artwork by Wikimedia Commons contributor Shizhao.

    Licence: Public domain Source: Wikimedia Commons

  • Match Pairs card icons: “Twemoji” © Twitter, Inc and other contributors.

    Licence: CC BY 4.0 Source: jdecked/twemoji

  • Tavla’s 3D wood texture: “Dark Wood” by Dario Barresi, Dimitrios Savva and Rico Cilliers, from Poly Haven.

    Licence: CC0 1.0 Source: Poly Haven

Fonts

Software that runs in your browser

  • Stockfish 18 (the chess computer’s two strongest levels): Stockfish.js (© 2026 Chess.com, LLC), based on Stockfish by T. Romstad, M. Costalba, J. Kiiski, G. Linscott and other contributors, with neural networks by Linmiao Xu (linrock). The source code of this release is at the links below; the licence text ships with the engine.

    Licence: GNU GPL v3 Source: nmrugg/stockfish.js v18.0.8, official-stockfish/Stockfish

  • chess.js (© 2025 Jeff Hlywa): the rules of chess.

    Licence: BSD 2-Clause Source: jhlywa/chess.js

  • pokersolver (© 2016 James Simpson and GoldFire Studios, Inc.): poker hand ranking.

    Licence: MIT Source: goldfire/pokersolver

  • three.js (© 2010–2026 three.js authors): 3D graphics.

    Licence: MIT Source: mrdoob/three.js

  • @noble/hashes (© 2022 Paul Miller): the hash functions of the tables’ fairness check.

    Licence: MIT Source: paulmillr/noble-hashes

  • Zod (© 2025 Colin McDonnell): data validation.

    Licence: MIT Source: colinhacks/zod

Software that runs on our server

  • Hono (© 2021–present Yusuke Wada and Hono contributors): the web server.

    Licence: MIT Source: honojs/hono

  • Better Auth (© 2024–present Bereket Engida): accounts and sign-in.

    Licence: MIT Source: better-auth/better-auth

Software that builds the site

  • Astro (© 2021 Fred K. Schott): builds the site’s pages.

    Licence: MIT Source: withastro/astro

Infrastructure

The site runs on Cloudflare (Cloudflare, Inc., USA). Signing in with Google is optional.

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