Walkie Talkie, an open source peer-to-peer iOS communicator

"and real-time radio streaming without requiring internet connectivity." is misleading. iPhones don’t have an accessible FM tuner, so there’s no true offline radio here. The project does P2P audio over Bluetooth/Wi-Fi (walkie-talkie style) and streams FM stations over the internet. Cool demo, but not RF radio — the README makes it sound like the phone can receive broadcast FM, which it can’t.

$ ls WalkieTalkie | grep mp3 | column

f1.mp3 f12.mp3 f15.mp3 f18.mp3 f20.mp3 f24.mp3 f5.mp3 f8.mp3 radio3.mp3 f10.mp3 f13.mp3 f16.mp3 f19.mp3 f21.mp3 f3.mp3 f6.mp3 f9.mp3 radio4.mp3 f11.mp3 f14.mp3 f17.mp3 f2.mp3 f23.mp3 f4.mp3 f7.mp3 radio2.mp3

Fun fact, there is some radio streaming built into the iPhone (all the Siri stuff too, so HomePods).

I found this out when a DJ on the radio kept yelling “hey siri play… <insert call sign here>”, and the same with OK Google.

I was getting annoyed, because he kept triggering my HomePod, but it didn’t understand what he said as the command. Then one time it worked. The DJ yelled and my HomePod kicked on and started playing the same station.

I assume this harkens back to the Internet radio that iTunes has supported forever.