Download

Windows

The installer contains everything: freedyn2, its own Python, and optionally a C compiler for models with expression forces or drivers. It installs per user, without administrator rights, and runs alongside legacy FreeDyn.

Download freedyn2-setup.exe (the latest release; all releases, their notes and SHA256 checksums: GitHub Releases)

Before the first release

The installer is published with the first release. Until then, install with pip or uv.

Python (Windows and Linux)

uv tool install "freedyn2[gui,compiler]"    # as a program, with uv
pip install "freedyn2[gui,compiler]"        # into the current Python environment

The package is on PyPI. Which way suits you, updating and uninstalling: Getting started.

Source code

github.com/freedyn-org/freedyn2, Apache License 2.0.

Code signing

The Windows installer is not signed yet. Windows SmartScreen therefore warns on the first start ("Windows protected your PC"): choose More info, then Run anyway.

To check that a download is the one built here, compare its SHA256 checksum with SHA256SUMS of the release:

Get-FileHash freedyn2-setup.exe -Algorithm SHA256

The installer and everything in it are built from this repository by GitHub Actions (workflow .github/workflows/wheels.yml) from a version tag; nothing is built by hand.

freedyn2 sends no data to anyone except as described in the privacy policy.