So two news:

• I accidentally left Patchwork opened on the computer and my phone started syncing my real feed data!

Was so fun to do this mistake and see things working :)

Second news:

• Could not get two phones replicating their feeds in realtime through LAN

Because Google apparently pooped on Android: https://android.stackexchange.com/questions/49188/how-to-get-mdns-working-for-chrome-on-android

I figured I have to use something called jsDNS for Java and/or Android. Might be time for creating react-native-jmdns. Or I could try using react-native-ssdp and wrapping that as an sbot plugin.