Frequently Asked Questions#

What version of Python does Briefcase support?#

Python 3.8 or higher.

What platforms does Briefcase support?#

Briefcase currently has support for:

  • macOS (producing DMG files, or raw .app files)

  • Linux (producing system packages, AppImage files or Flatpaks)

  • Windows (producing MSI installers)

  • iOS (producing Xcode projects)

  • Android (producing Gradle projects)

Support for other some other operating systems (e.g., tvOS, watchOS, WearOS, and the web) are on our road map.

Briefcase’s platform support is built on a plugin system, so if you want to add support for a custom platform, you can do so; or, you can contribute the backend to Briefcase itself.

How do I detect if my app is running in a Briefcase-packaged container?#

Briefcase adds a PEP566 metadata file when it installs your app’s code. The metadata can be retrieved at runtime as described in the Accessing Briefcase packaging metadata at runtime how-to. You can determine if your app was packaged with Briefcase by testing for the existence of the Briefcase-Version tag:

in_briefcase = 'Briefcase-Version' in metadata

Can I use third-party Python packages in my app?#

Yes! Briefcase uses pip to install third-party packages into your app bundle. As long as the package is available on PyPI, or you can provide a wheel file for the package, it can be added to the requires declaration in your pyproject.toml file and used by your app at runtime.

If the package is pure-Python (i.e., it does not contain a binary library), that’s all you need to do.

If the package contains a binary component, you’ll need to ensure that a binary wheel is available for the platform you’re targeting. For desktop platforms, binary wheels are hosted on PyPI; Android binary wheels are hosted on the Chaquopy package index; iOS binary wheels are available on the BeeWare repository on

The Android and iOS repositories do not have binary wheels for every package that is on PyPI. If you experience problems when building or running an app on a mobile platform that appear to be related to a missing dependency, check the build logs for your app. If you see:

  • On Android: the error “Chaquopy cannot compile native code”

  • On iOS: the error “Cannot compile native modules”

  • A reference to downloading a .tar.gz version of the package

  • A reference to Building wheels for collected packages: <package>

The binary dependency isn’t supported on mobile. Binary mobile packages are currently maintained by the BeeWare team; if you have a particular third-party package that you’d like us to support, open a ticket providing details.