@bob developer #AndreaSchäfer wrote a piece on the @purism blog about #Chatty, a mobile GNU/Linux chat app that will use #LibPurple to chat over a variety of protocols, including SMS:
https://puri.sm/posts/librem5-progress-report-19/
The work is being done for the touchscreen version of #PureOS, will I presume will be easily portable to other mobile GNU/Linux distros, especially those based on #Debian.