YTMusicUltimate: a Theos tweak for YouTube Music on iOS

What YTMusicUltimate patches and who it is for

YTMusicUltimate is a tweak for the YouTube Music app on iOS, written in Objective-C/C with a Theos build system. The repository describes it as "The best tweak for the YouTube Music on iOS" and ships as two artifacts: an arm.deb for rootful jailbroken devices and an arm64.deb for rootless ones. The Makefile sets ARCHS = arm64 and TARGET = iphone:clang:16.5:13.0, so the build is aimed at arm64 iOS hardware with a deployment floor of iOS 13.0 and a toolchain pinned to the 16.5 SDK. INSTALL_TARGET_PROCESSES = YouTubeMusic tells the package system which process to restart so the tweak loads.

The audience is narrow by design. You need a jailbroken device to use the .deb packages, or you need to build a tweaked IPA and sign it yourself. The README states plainly that a sideloading IPA is no longer provided and that the project cannot supply a decrypted YouTube Music .ipa "due to legal reasons." That is not a temporary gap; it is the shape of the project. Anyone who wants a one-click install without a jailbreak is not the target user.

How the tweak is assembled: Theos, hooks and the SIDELOADING flag

The build is a standard Theos tweak layout. The top level holds Makefile, control, YTMusicUltimate.plist, Source/, Resources/ and layout/. The Makefile names the tweak YTMusicUltimate and collects sources with a shell find over Source for .x, .xm and .m files, filtering out Source/Sideloading.x unless the build is for IPA injection:

TWEAK_NAME = YTMusicUltimate
$(TWEAK_NAME)_FILES = $(filter-out Source/Sideloading.x, $(shell find Source \( -name '*.x' -o -name '*.xm' -o -name '*.m' \)))
$(TWEAK_NAME)_CFLAGS = -fobjc-arc -Wno-deprecated-declarations -DTWEAK_VERSION=$(PACKAGE_VERSION)

The conditional matters. When SIDELOADING=1 is passed, Source/Sideloading.x is added back into the file list, which is how the same source tree produces both a jailbreak package and an injectable dylib for an IPA. Framework and library linkage is declared in the same file: UIKit, Foundation, AVFoundation, AudioToolbox and VideoToolbox, plus bz2, c++, iconv and z. Prebuilt static archives are picked up from Source/Utils/lib. Two Theos package schemes are selectable, rootless and roothide, each switching THEOS_PACKAGE_SCHEME.

The repository does not document what the hooks change inside YouTube Music. There is no feature matrix, no list of patched classes, and no changelog beyond release tags. The screenshots in the README are the only public description of the result. If you need to know exactly which behaviours are altered before installing, that information is not in the repository.

Installing from the ginsu.dev repo or building the deb yourself

For a jailbroken device, the README gives one route: add the ginsu.dev repo to your package installer and download the latest version, or take the .deb from the Releases page. Pick the arm.deb for a rootful device and the arm64.deb for a rootless one. Getting that choice wrong is the most common install mistake, because a rootless package installed on a rootful jailbreak will not load.

To build on your own machine, install Theos, clone the repository, and run one of three targets from the project folder. The README lists them as follows:

make clean package
make clean package ROOTLESS=1
make clean package SIDELOADING=1

The first produces a deb for a rootful device, the second for a rootless device, and the third a deb intended for injection into an IPA. The README points to Azule for the injection step itself. There is no documented uninstall procedure beyond removing the package through the same installer.

Building the IPA in GitHub Actions without a Mac

The README's longest section covers building a tweaked IPA on GitHub's runners, which avoids needing Theos locally. Fork the repository, then open Repository Settings > Actions and enable Read and Write permissions. In the Actions tab, choose the workflow named "Build and Release YTMusicUltimate", click "Run workflow", and supply a direct URL to a decrypted YouTube Music .ipa hosted on filebin.net or Dropbox. The workflow builds the tweak and publishes the result to the fork's releases page.

# After the workflow succeeds, the artifact appears under:
https://github.com/YOURUSERNAME/YTMusicUltimate/releases

The README is blunt about failure modes here. It says the culprit is the IPA URL "99.9% of the time" and that the file must be a .ipa, not another extension. If the workflow runs but you cannot find the output, the README's advice is to append /releases to your forked repository URL. For repeat builds, it suggests syncing the fork rather than redoing the first steps. Note that the workflow needs a decrypted IPA, which the project explicitly will not help you obtain.

Where YTMusicUltimate stops being the right tool

The clearest limitation is distribution. There is no official sideloading IPA, and the project states it cannot provide a decrypted YouTube Music binary. That leaves every non-jailbroken user building and signing the IPA themselves, which requires a decrypted app binary, a GitHub account with Actions write permissions, and a signing path. That is a real amount of work for a tweak whose feature set is not documented in the repository.

Version drift is the second constraint. The Makefile carries PACKAGE_VERSION = 2.4.1 while the newest release tag is v2.4.1 from 2026-03-19, and the previous tag, v2.4, landed one day earlier. The gap before that, from v2.3.1 in January 2025 to v2.4 in March 2026, is long enough that anyone running an older deb should check which version their installed package reports. The repository does not document compatibility with specific YouTube Music app versions, so a tweak built against one client release may behave differently against another.

Licensing is a third boundary. The project is GPL-3.0, which is a copyleft licence. If you fork the repository and distribute a modified build, the obligations that come with that licence apply to your distribution. Nothing in the README discusses this, and it is not legal advice; read the LICENSE file before you publish anything derived from it.

YTMusicUltimate against a plain jailbreak tweak workflow

The obvious alternative is not another product but the manual route: clone a Theos tweak skeleton, write your own hooks against the YouTube Music binary, and package it with the same make clean package commands. The difference is scope. YTMusicUltimate already wires up the frameworks (UIKit, AVFoundation, AudioToolbox, VideoToolbox), links bz2, c++, iconv and z, bundles static archives under Source/Utils/lib, and provides three build modes including the SIDELOADING path that adds Source/Sideloading.x. Writing that scaffolding yourself is the work the project has already done.

The trade-off is the same one every prebuilt tweak carries: you inherit someone else's choices about which behaviours to patch, with no published list of them. A personal tweak is smaller and fully understood; YTMusicUltimate is larger and only partly documented. If you want to know exactly what runs inside your YouTube Music process, the repository will not tell you.

Editorial conclusion

Adopt YTMusicUltimate only if you already run a jailbroken iOS device (rootful or rootless) or are willing to build a tweaked IPA yourself with a decrypted YouTube Music .ipa and Azule. Do not adopt it if you expect a prebuilt sideloading IPA, a documented feature list, or support for anything other than the YouTube Music process. Before you start, check the Makefile's PACKAGE_VERSION against the release you intend to install and confirm your device is arm64.

Frequently asked questions

Official sources

1. dayanch96/YTMusicUltimate on GitHub
2. Issues
3. License: GPL-3.0
4. README
5. Releases