Sorry, but no. The problem is that the speech recognition is a major part of this app and is only freely provided by Microsoft Windows platform. There are other speech platforms but they typically require online processing and charge fees, which I won't support. It is built on the .net core platform for portability, but its reliance on these MS components limits it. There are some open source SR engine initiatives out there so perhaps in the future, but don't hold your breath - it might be a while.
edit: There is the Kaldi SR engine which I can possibly work with in the future found here: https://github.com/kaldi-asr/kaldi