Apple是否会修改提交到App Store的应用程序上的iOS应用程序可执行文件？

Is an app's executable file byte-for-byte identical when the app is purchased through the App Store and installed on a user's iPhone, compared to the original executable file submitted to Apple in the original app bundle? Or is it different (for example, with additional signatures or encryption)?Is an app's executable file byte-for-byte ident