Convert ebook From fb2 to rb

FB2 file is a FictionBook 2.0 file saved in an eBook format developed in Russia. It contains XML that describes each element of the book and is designed primarily for fictional literature. FB2 files can be viewed by various eBook readers for Windows, macOS, and Linux. Information from <a href='https://fileinfo.com'>FileInfo - The File Extensions Database</a>.

An RB file is a configuration file used by Rosebud, a Windows CE and Windows Mobile application that allowed users to control devices via SMS. It contains XML that defines a user's Rosebud commands. Rosebud and RB files were used on Pocket PC devices. Information from <a href='https://fileinfo.com'>FileInfo - The File Extensions Database</a>.