I think you want LoLRa - it's a way to transmit LoRa radio packets using nothing but IO pins https://github.com/cnlohr/lolra

OMG. Thank you for including this comment. I wasn't aware that this level of shenanigans was possible with just IO pins. This deserves its own post on Hackernews if it's not there already.

No, although many Androids already have an actual FM radio.

I think a websdr?

Haha that would been something, sorry for the disappointment :)