Always ensure you install the tweak from the official repository and exercise caution when installing third-party IPA files.
AppSync Unified ，通常也被简称为 AppSync ，是一个专门为iOS越狱设备设计的系统级补丁。其核心功能是绕过iOS系统严苛的应用签名验证，让用户可以不受限制地在设备上安装和运行任何格式的IPA软件包，包括临时签名、自由/企业证书签名，甚至完全或证书已过期的应用。该插件由开发者Karen/あけみ（AngelXwind）和Linus Yang共同维护，自诞生以来，已横跨从iOS 5到iOS 18等多个大版本。
com.karenapps.appsyncunified Name: AppSync Unified Depends: mobilesubstrate, preferenceloader, firmware (>= 5.0) Version: (varies by release) Architecture: iphoneos-arm Description: Unified patch for installd to allow unsigned IPA installations. Maintainer: Karen (ts-appsyncunified) Author: Linus Yang (and various contributors over the years) Section: Tweaks appsync unified deb
While the tool is often associated with "IPA sites," its primary purpose is for developers testing apps and users who want to keep old, delisted apps alive on their devices. Is it Safe?
Tap or Edit , then enter the official URL: https://akemi.ai [1] Wait for the repository source to refresh. Go to the Search tab and type AppSync Unified [1]. Always ensure you install the tweak from the
If you need help troubleshooting an installation error or want to find compatible tools, let me know: What is your device running?
| iOS Version | Compatibility | Notes | | :--- | :--- | :--- | | iOS 3 – 6 | Legacy only | Use older builds; not recommended for daily drivers. | | iOS 7 – 8.4 | Partial | Requires specific version 5.0-1. | | iOS 9 – 10.2 | Stable | Version 6.0-b1 works well. | | iOS 11 – 14.8 | Fully Stable | Most common usage range. | | iOS 15 – 16.5 | Stable (Rootless) | : Use the rootless fork (e.g., version 95+). | | iOS 17+ | Experimental | Check developer Discord servers; rootless required. | Is it Safe
It allows you to restore purchased apps from iTunes (old versions) or install modified versions of App Store apps without a signature conflict.
Unlike earlier, "fragmented" versions of AppSync that often caused boot loops or system instability, the "Unified" version was engineered to be a singular, stable package compatible with virtually every iOS version from 5.0 to 16.5.1
：当应用安装完成后，在启动时还会面临另一道名为 FrontBoard 的启动验证关卡。 AppSync Unified 的第二个模块会修改 FrontBoard 服务的验证链，系统在启动应用时会被强制跳过签名有效性检查，确保非官方签名的应用也能正常打开。