This repo contains the source code for the DuckDuckGo iOS and macOS browsers, and the libraries that are shared between them to provide cross-platform features.

We use submodules, so you will need to bring them into the project in order to build and run it:

Run git submodule update --init --recursive

If you're not part of the DuckDuckGo team, you should provide your Apple developer account id, app id, and group id prefix in an ExternalDeveloper.xcconfig file. To do that:

1. Run cp iOS/Configuration/DuckDuckGoDeveloper.xcconfig iOS/Configuration/ExternalDeveloper.xcconfig
2. Edit iOS/Configuration/ExternalDeveloper.xcconfig and change the values of all fields
3. Clean and rebuild the project

If you're not part of the DuckDuckGo team, go to Signing & Capabilities to select your team and custom bundle identifier.

We use Swift Package Manager for dependency management, which shouldn't require any additional set up.

We use SwifLint for enforcing Swift style and conventions, so you'll need to install it.

We have taken steps to update our terminology and remove words with problematic racial connotations, most notably the change to main branches, allow lists, and blocklists.

Please refer to the contributing doc.

Contact us at https://duckduckgo.com/feedback if you have feedback, questions or want to chat. You can also use the feedback forms embedded within our mobile & desktop apps - to do so please navigate to the app's settings menu and select "Send Feedback".

DuckDuckGo is distributed under the Apache 2.0 license.

Copyright 2026 DuckDuckGo

Duck Sans is a proprietary typeface created by Fontwerk and licensed to DuckDuckGo under commercial terms. Duck Sans font files are not licensed under the Apache License, Version 2.0, or covered by any open-source license applicable to this repository. You may not extract, copy, distribute, modify, or use Duck Sans font files for any purpose outside of running this software as distributed by DuckDuckGo. If you are building this software from source and do not have a valid Duck Sans license, the build system will substitute a placeholder font. Redistributions of compiled builds that include Duck Sans must retain this notice. All rights in and to Duck Sans are reserved by Fontwerk (fontwerk.com).