LEGAL / LICENSING

Licenses

NutsEmu and the NutsEmu Companion are proprietary software by Evan Bolton / Nuts Engineering. They are built on open-source components, and each of those components stays under its own license. Nothing in our license, our EULA, Patreon's terms or any Patreon tier limits the rights those licenses give you, including your LGPL rights to modify, rebuild and replace the LGPL libraries and to reverse engineer for debugging such changes.

Third-party noticesEvery open-source component, its license and copyright LICENSENutsEmu and NutsEmu Companion License textsPlain-text LGPL, GPL, Apache, MIT, MPL, FTL Source code →LGPL source + our changes, free, no login

01 / THIRD-PARTY NOTICES

Third-party notices

NutsEmu and NutsEmu Companion are proprietary software by Evan Bolton, except NutsEmu's changes to Wine: those, including NutsSync (include/wine/nutssync.h, NutsEmu's in-process synchronization for Wine) and NutsEmu's iOS compatibility layer compiled into Wine, are free software under the GNU LGPL 2.1 or later and are published with Wine's source. NutsEmu's winnt.h wrapper, compiled into vkd3d-proton's d3d12.dll and d3d12core.dll, is also under the LGPL 2.1 or later, and the build scripts published with the source are under the MIT License. They include the open-source components listed below. Each component stays under its own license. Nothing in the NutsEmu license (EULA), in Patreon's Terms of Use or in a Patreon tier limits the rights those licenses give you. The full license texts are in the licenses/ folder that comes with this file.

Source code: the complete corresponding source of every LGPL component (Wine, vkd3d-proton, GnuTLS, libtasn1, libunistring, Nettle, mini-GMP, apple-codesign-quick), our changes to those components, their build scripts and configuration, and the object files for relinking DXMT's winemetal.dll with a modified Wine winecrt0, for each released build (starting with build 1337), are available free of charge at https://nutsdeveloping.com/source. See SOURCE-OFFER.md for the written offer.

Intended use. NutsEmu is a development build of a Windows-to-iOS translation layer, shared with supporters of its development for testing, research, learning and development. It is in active development and is not a finished consumer product. You install it and sign it with your own Apple ID on your own device, for your personal use, and you are responsible for complying with the terms of Apple's developer program and of any third-party tools you use with it (for example JIT/VPN helpers such as LocalDevVPN, or sideloading tools). This does not limit the open-source license rights described in this file.

Part A: NutsEmu (iPhone app, `NutsEmu.ipa`)

A1. LGPL components: important notice

NutsEmu uses the following libraries, which are covered by the GNU Lesser General Public License. They are separate shared libraries (.so, .dll, .dylib) that NutsEmu loads at run time. You may modify them, rebuild them, replace them in the app and re-sign the app with your own Apple ID. The NutsEmu license permits that and permits reverse engineering for debugging such modifications. Copies of the LGPL 2.1, the LGPL 3 and the GPL 3 are in licenses/.

Component	Version	License	Modified by NutsEmu	Files in the app	License text
Wine	11.18	LGPL-2.1-or-later. "Copyright (c) 1993-2026 the Wine project authors (see the file AUTHORS for a complete list)"	Yes, see the patch series at https://nutsdeveloping.com/source (NutsEmu's Wine changes, including NutsSync and the iOS compatibility layer, are LGPL-2.1-or-later too)	`lib/wine*/` (all `.dll`, `.drv`, `.exe`, `.so`, `.nls`, `libwineserver.dylib`), `share/wine/`	`licenses/wine/COPYING.LIB`, `licenses/wine/LICENSE`, `licenses/wine/NOTICES.md`
vkd3d-proton	commit 750061ae2b (Oct 5 2026)	LGPL-2.1-or-later. "Copyright 2016-2024 the vkd3d-proton project authors (see the file AUTHORS for a complete list)"	Yes	`d3d12.dll`, `d3d12core.dll` (64-bit only)	`licenses/vkd3d-proton/`
GnuTLS	3.8.9	LGPL-2.1-or-later	No	`libgnutls.30.dylib`	`licenses/gnutls/`
libtasn1 (inside GnuTLS)	bundled with GnuTLS 3.8.9	LGPL-2.1-or-later	No	`libgnutls.30.dylib`	`licenses/gnutls/`
libunistring (gnulib, inside GnuTLS)	bundled with GnuTLS 3.8.9	LGPL-3.0-or-later OR GPL-2.0-or-later	No	`libgnutls.30.dylib`	`licenses/gnutls/`, `licenses/LGPL-3.0.txt`, `licenses/GPL-3.0.txt`
Nettle (with mini-GMP)	3.10.1	LGPL-3.0-or-later OR GPL-2.0-or-later	No	`libnettle.8.dylib`, `libhogweed.6.dylib`	`licenses/nettle/`, `licenses/LGPL-3.0.txt`, `licenses/GPL-3.0.txt`

Wine bundles other projects' code. Their original copyright notices are reproduced in full in licenses/wine/NOTICES.md (Wine's own file; for example FFmpeg, mpg123, FluidSynth, vkd3d, zlib, libpng, libjpeg, LibTIFF, libxml2, Little CMS, musl, Unicode data, Bitstream Vera).

FFmpeg: This software uses code of FFmpeg (https://ffmpeg.org) licensed under the LGPLv2.1 (the copy bundled in Wine's source tree: libswscale, libswresample, libavutil, inside Wine's colorcnv.dll, msvproc.dll, vidreszr.dll, iyuv_32.dll, resampledmo.dll). Its source can be downloaded at https://nutsdeveloping.com/source. NutsEmu does not own FFmpeg. Its copyright holders are listed in FFmpeg's source.

WMA v2 format tables: NutsEmu's own WMA decoder (wmadmod.dll) contains numeric format tables (Huffman codebooks, band tables) generated from FFmpeg's libavcodec/wmadata.h, aactab.c and wma_freqs.c, which are licensed under the LGPL-2.1-or-later. The generated table file wma_tables.c keeps FFmpeg's copyright notice and is published at https://nutsdeveloping.com/source.

A2. Permissive components (MIT, BSD, Apache-2.0, zlib, FTL, MPL-2.0)

Component	Version	License	Modified by NutsEmu	Files in the app	License text
FEX-Emu	FEX-2609.1	MIT. "Copyright (c) 2019 Ryan Houdek"	Yes	`xtajit64.dll`, `xtajit.dll`	`licenses/FEX/LICENSE`
FEX bundled libraries (fmt, xxHash, SoftFloat-3e, cephes, rpmalloc, range-v3, unordered_dense, tiny-json; vixl and zydis are not built in)	as pinned by FEX-2609.1	MIT / BSD-2-Clause / BSD-3-Clause / BSL-1.0 / 0BSD, per file. SoftFloat-3e: BSD-3-Clause, "Copyright 2011, 2012, 2013, 2014, 2015, 2017 The Regents of the University of California"	No	inside the xtajit DLLs	`licenses/FEX/External/*`
DXMT	v0.80 (commit 589adb7803, MIT)	MIT. "Copyright (c) 2023 Feifan He"	Yes	`d3d11.dll`, `dxgi.dll`, `d3d10core.dll`, `winemetal.dll`, `winemetal.so` (`winemetal.dll` also contains a few functions of Wine's LGPL `winecrt0` library; its object files for relinking are at https://nutsdeveloping.com/source)	`licenses/dxmt/LICENSE`
DXVK code inside DXMT	as included in DXMT v0.80	zlib. Copyright (c) 2017 Philip Rebohle, Copyright (c) 2019 Joshua Ashton	per DXMT	inside the DXMT modules	`licenses/dxmt/dxvk.LICENSE`
Microsoft DXBC parser inside DXMT	as included in DXMT v0.80	MIT, Copyright (c) Microsoft Corporation	per DXMT	inside the DXMT modules	`licenses/dxmt/DXBCParser.LICENSE`
LLVM	15.0.7	Apache-2.0 WITH LLVM-exception (plus the legacy LLVM/UIUC license for older code)	No	inside `winemetal.so`	`licenses/llvm/LICENSE.TXT`
Mesa (Gallium, Zink, EGL, KosmicKrisp)	26.3.0-devel (commit 27b5db37b5)	MIT (most files; other files carry their own permissive notices, collected per file)	Yes	`libgallium-26.3.0-devel.dylib`, `libEGL.1.dylib`, `libvulkan_kosmickrisp.dylib`	`licenses/mesa/`
MoltenVK	1.4.2 (commit db66022459)	Apache-2.0	Yes	`libvulkan.1.dylib`, `libMoltenVK.dylib`	`licenses/moltenvk/LICENSE`
SPIRV-Cross (inside MoltenVK)	as pinned by MoltenVK	Apache-2.0	Yes	inside MoltenVK	`licenses/spirv-cross/LICENSE`
cereal (inside MoltenVK)	as pinned by MoltenVK	BSD-3-Clause	No	inside MoltenVK	`licenses/cereal/LICENSE`
Vulkan-Headers, SPIRV-Headers, SPIRV-Tools (SPIRV-Tools is inside MoltenVK)	as pinned	per their LICENSE files	No	inside MoltenVK / vkd3d-proton	`licenses/khronos/`
dxil-spirv, dxbc-spirv (inside vkd3d-proton)	as pinned by vkd3d-proton	MIT. dxil-spirv: Copyright (c) 2019-2022 Hans-Kristian Arntzen for Valve Corporation	No	inside `d3d12*.dll`	`licenses/vkd3d-proton/subprojects/`
FreeType	2.14.3	FreeType License (FTL)	No	`libfreetype.6.dylib`	`licenses/freetype/FTL.TXT`
LuaJIT	2.1 (commit c6ffc141a8)	MIT. "Copyright (C) 2005-2026 Mike Pall"; includes Lua, "Copyright (C) 1994-2012 Lua.org, PUC-Rio"	No	`share/nutsemu/lua51.dll`	`licenses/luajit/COPYRIGHT`
idevice	0.1.68 (commit d32c8189c5)	MIT. "Copyright 2026 Jackson Coxson"	No	statically linked into `NutsEmu` and `NutsProcess`	`licenses/idevice/LICENSE.txt`
Rust crates compiled into idevice's FFI library	per `Cargo.lock`	MIT / Apache-2.0 / ISC / BSD / Unicode / OpenSSL-SSLeay (ring), per crate	No	statically linked into `NutsEmu` and `NutsProcess`	`licenses/idevice-deps/` (one folder per crate)
Mozilla CA certificate bundle (curl's `cacert.pem`)	Mozilla data as of Sep 25 2026	MPL-2.0	No	`share/ca/cacert.pem`	`licenses/MPL-2.0.txt`. The file itself is its source form; the original is at https://curl.se/docs/caextract.html
llvm-mingw toolchain runtime pieces	20260421	Apache-2.0 WITH LLVM-exception (libc++, compiler-rt); mingw-w64 runtime per `COPYING.MinGW-w64-runtime.txt`	No	statically linked into the mingw-built `.dll` files (FEX, DXMT, vkd3d-proton, LuaJIT)	`licenses/llvm-mingw/`

FreeType: Portions of this software are copyright © 1996-2026 The FreeType Project (https://freetype.org). All rights reserved. NutsEmu's font rendering is based in part on the work of the FreeType Team.

Changes: components marked "Modified" include changes made by Evan Bolton. For the LGPL components, those changes are published as dated patch files at https://nutsdeveloping.com/source. MoltenVK and SPIRV-Cross (Apache-2.0) have been modified by Evan Bolton, and each changed file carries a notice stating that it was changed.

Not included: NutsEmu includes no games, no Windows installation media and no Microsoft software. Windows is a trademark of Microsoft Corporation, and Steam is a trademark of Valve Corporation. NutsEmu is not affiliated with or endorsed by either company, or by any of the projects above.

Part B: NutsEmu Companion (Mac app)

Component	Version	License	Modified	Where	License text
Python	3.12.14 (python-build-standalone release 20260924, install_only build for aarch64-apple-darwin)	PSF License Agreement v2	No	`Contents/Resources/python/`	`python/lib/python3.12/LICENSE.txt`
Libraries built into that Python: OpenSSL 3.5.8, libffi, expat 2.8.5, mpdecimal 4.0.0, SQLite 3.53.1, liblzma (XZ Utils), bzip2, libuuid, and the Tcl/Tk stub libraries in `_tkinter` (zlib, libedit and ncurses come from macOS and are not included)	as shipped by the Python distribution	Apache-2.0 (OpenSSL 3), MIT, BSD, public domain, etc., per library	No	`python/lib/python3.12/lib-dynload/`, `python/bin/python3`	`licenses/python/` (the distribution's license files)
idevice (in `idevice-tools`)	0.1.68 (commit d32c8189c5)	MIT. "Copyright 2026 Jackson Coxson"	No	`Contents/Resources/bin/idevice-tools`	`licenses/idevice.txt`
Rust crates in `idevice-tools` (≈300, incl. ring, rustls, aws-lc-rs/aws-lc-sys, tokio, webpki-roots)	per `Cargo.lock`	MIT / Apache-2.0 / ISC / BSD-3-Clause / Zlib / CC0-1.0 / Unicode / CDLA-Permissive-2.0 (webpki-roots) / OpenSSL-SSLeay, per crate. aws-lc's jitterentropy is used under BSD-3-Clause (Amazon "expressly elects" BSD, not GPL-2.0)	No	`idevice-tools`	`licenses/<crate>-<version>/`
isideload	0.4.4 (commit 0bee45d8cdb07ca24524a26f38fdda0dbb4e04b3)	MIT	No	Apple sign-in helper (Companion: `Contents/Resources/bin/nutsemu-apple-auth`)	`licenses/apple-auth/isideload-0.4.4/`
apple-codesign-quick	0.1.0	LGPL-2.1-or-later	Yes (`src/bundle.rs`)	statically linked into the Apple sign-in helper	`licenses/apple-auth/apple-codesign-quick-0.1.0/COPYING.LESSER`
Rust crates in the Apple sign-in helper (≈300)	per `Cargo.lock`	as listed in `licenses/apple-auth/PACKAGES.md`	No	helper	`licenses/apple-auth/<crate>-<version>/`

LGPL notice (apple-codesign-quick): the Apple sign-in helper is a "work that uses the Library" apple-codesign-quick, which is covered by the GNU LGPL 2.1 (licenses/LGPL-2.1.txt). Because the library is statically linked, the helper's own source code, its Cargo.lock, the library's source and the rebuild steps are provided at https://nutsdeveloping.com/source (and in SigningSource/ inside the app). You can modify the library and rebuild the helper. The NutsEmu license permits that and permits reverse engineering for debugging such modifications.

Network service: Apple sign-in uses the StikStore anisette service (https://ani.stikstore.app), operated by a third party, to generate Apple authentication headers. It is not part of the Companion and not covered by this file. See the EULA's privacy section.

02 / LICENSE

LICENSE

NutsEmu

NutsEmu
Copyright (c) 2026 Evan Bolton. All rights reserved, except as stated below.

1. Proprietary code. Unless a file states otherwise, the source code in this
   repository and the binaries built from it are proprietary. They may not be
   copied, modified or distributed without written permission, except as allowed
   by section 3 below or by the NutsEmu End-User License Agreement (EULA.md) that
   comes with each binary release. NutsEmu's changes to Wine (patches/wine/), including
   NutsSync, and the iOS compatibility layer compiled into Wine (platform/ios-compat/,
   platform/wineserver-entry.c) are not proprietary: they are licensed under the GNU
   Lesser General Public License 2.1 or later, as each file states.

2. Third-party components. This software includes open-source components that
   are licensed under their own terms, listed in THIRD-PARTY-NOTICES.md, with the
   license texts in the licenses/ folder. This notice does not change those terms.

3. Your open-source rights are not limited. Some components, including
   Wine (and the FFmpeg code bundled in it), vkd3d-proton,
   GnuTLS, libtasn1, libunistring, Nettle and mini-GMP,
   are licensed under the GNU Lesser General Public License (version 2.1 or 3).
   Nothing in this notice, in the EULA, in Patreon's Terms of Use or in any
   Patreon tier restricts the rights those licenses grant. In particular, and
   regardless of section 1, anyone who receives a binary release may:
     a. modify those libraries, and modify this software for their own use so it
        works with the modified libraries;
     b. rebuild those libraries, replace them in their copy of the app, and
        re-sign and install the app with their own Apple ID or certificate; and
     c. reverse engineer this software to the extent needed to debug such
        modifications.
   Where this notice conflicts with an open-source license for a component, that
   license controls for that component. The complete corresponding source of the
   LGPL components, our changes to them and the build scripts are available as
   described in SOURCE-OFFER.md.

4. No warranty. This software is provided "as is", without warranty of any kind,
   to the extent permitted by law. See EULA.md.

5. Intended use. NutsEmu is a development build of a Windows-to-iOS translation
   layer, shared with supporters of its development for testing, research,
   learning and development. It is in active development and is not a finished
   consumer product. Recipients install and sign it with their own Apple ID on
   their own devices, for their personal use, and are responsible for complying
   with Apple's developer program terms and the terms of any third-party tools
   they use (such as JIT/VPN helpers like LocalDevVPN, or sideloading tools).
   This section does not limit section 3.

NutsEmu Companion

NutsEmu Companion
Copyright (c) 2026 Evan Bolton. All rights reserved, except as stated below.

1. Proprietary code. Unless a file states otherwise, the source code in this
   repository and the binaries built from it are proprietary. They may not be
   copied, modified or distributed without written permission, except as allowed
   by section 3 below or by the NutsEmu End-User License Agreement (EULA.md) that
   comes with each binary release.

2. Third-party components. This software includes open-source components that
   are licensed under their own terms, listed in THIRD-PARTY-NOTICES.md, with the
   license texts in the licenses/ folder. This notice does not change those terms.

3. Your open-source rights are not limited. Some components, including
   apple-codesign-quick (built into the Apple sign-in
   helper), and the LGPL libraries inside the NutsEmu app it installs,
   are licensed under the GNU Lesser General Public License (version 2.1 or 3).
   Nothing in this notice, in the EULA, in Patreon's Terms of Use or in any
   Patreon tier restricts the rights those licenses grant. In particular, and
   regardless of section 1, anyone who receives a binary release may:
     a. modify those libraries, and modify this software for their own use so it
        works with the modified libraries;
     b. rebuild those libraries, replace them in their copy of the app, and
        re-sign and install the app with their own Apple ID or certificate; and
     c. reverse engineer this software to the extent needed to debug such
        modifications.
   Where this notice conflicts with an open-source license for a component, that
   license controls for that component. The complete corresponding source of the
   LGPL components, our changes to them and the build scripts are available as
   described in SOURCE-OFFER.md.

4. No warranty. This software is provided "as is", without warranty of any kind,
   to the extent permitted by law. See EULA.md.

5. Intended use. This software installs NutsEmu, a development build of a
   Windows-to-iOS translation layer, shared with supporters of its development
   for testing, research, learning and development. It is in active development
   and is not a finished consumer product. Recipients install and sign it with
   their own Apple ID on their own devices, for their personal use, and are
   responsible for complying with Apple's developer program terms and the terms
   of any third-party tools they use (such as JIT/VPN helpers like LocalDevVPN,
   or sideloading tools). This section does not limit section 3.

04 / LICENSE TEXTS

License texts

Unmodified copies from the official sources named in brackets. The same files, plus each Rust crate's license, ship inside the apps in their licenses/ folder.

GNU Lesser General Public License v2.1 — Wine, vkd3d-proton, GnuTLS, libtasn1, apple-codesign-quick (gnu.org)
GNU Lesser General Public License v3 — Nettle, mini-GMP, libunistring (gnu.org)
GNU General Public License v3 — required alongside the LGPL v3 (gnu.org)
Apache License 2.0 — MoltenVK, SPIRV-Cross, LLVM, many Rust crates (apache.org)
LLVM Exceptions to the Apache 2.0 License — LLVM, llvm-mingw runtimes (SPDX)
MIT License (template) — FEX-Emu, DXMT, Mesa, idevice, LuaJIT, dxil-spirv… (copyright lines in the notices) (SPDX)
Mozilla Public License 2.0 — Mozilla CA certificates (cacert.pem) (mozilla.org)
The FreeType Project License — FreeType (freetype.org)

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