OpenDeck is open
The app is open source under the Apache License 2.0 — build it, fork it, ship products on it, for free. It will always be free to use: no paid tiers, no in-app purchases.
The official apps in the stores are built and signed by the OpenDeck project. That's the only thing reserved — the name, the icon, and the signed official build. The code gives that build no advantage you can't reproduce yourself.
Three pieces
Build your own viewer
We want alternative players. The .deck format is public domain —
implement it in any language, on any platform, with no permission and no royalties.
The only rule when you ship to end users: use your own name and icon, not "OpenDeck."
Read the format Brand & trademark policy
Contributing
We use a lightweight DCO sign-off (git commit -s)
rather than a CLA — you keep ownership of your work. See each repository's
CONTRIBUTING.md to get started.