i-FunBox, or iFunbox, is a tool to transfer, manage, browse and explore files on iPhone, iPad and iPod Touch via USB. It download apps to iPhone and iPad, edit app sandboxes and add, remove or replace files. It can convert extracted binary .plist files to plain text and vice versa. A jailbreak is not necessarily required. It can work together with AppSync.
Hasn't been updated since 2017. See http://www.i-funbox.com/en_download.html