If you see a website offering "AppSync Unified Repo Repack 2025 – No Jailbreak Required," . AppSync requires a jailbreak. Without a jailbreak, a "repack" is simply a virus.
Standard .deb uses xz for data.tar and control.tar. You can force higher compression or change to zstd (faster decompression on modern iPhones). appsync unified repo repack
For example:
It is highly recommended to use the official source to ensure system stability and security. 1. Add the Repository If you see a website offering "AppSync Unified