Source & license
Windsify now has a public, buildable Free source edition and a separate private Pro development repository.
License
The official Windsify 1.4.13 app contains the Pro edition under the Wondering Works commercial EULA. It starts with a 14-day Pro trial and then retains the Free feature layer.
The Windsify Free feature layer is open source under GPL-3.0-only at Fuzzy-and-Fluffy/windsify-free.
Windsify Mac v1.0.1 was released under the GNU General Public License, version 3.0 only (GPL-3.0-only). Copies already obtained remain licensed under those terms.
Copyright (c) 2026 Wondering Works
The complete GPL text shipped with that release.
Source
The full development repository is private. The reviewed Windsify Free source is public in a separate history-free repository and contains no Pro, Polar licensing, signing or notarization source.
Build it yourself
The GPL continues to permit anyone who obtained v1.0.1 to build, change and run that copy. The new Free repository includes its own XcodeGen project, tests and verification script. The official signed and notarized Windsify 1.4.13 package is available from the Download link above.
Why readable source matters
Windsify works through a keyboard event tap — software that, by its nature, sits between your keys and your Mac. The Free source keeps its keyboard and privacy behavior inspectable: key codes and modifier flags are evaluated in memory, each event is discarded once the action is chosen, and typed text is not recorded.