School project, need to communicate between multple devices

We have a school project that requires for us to give one live location to multiple devices at once. Currently we're expirementing with CloudDB to make this happen, but we've run into some problems. Namely, we can't seem to communicate between two phones. Any help is appreciated.

Try with UDP ?

Welcome @TIR_11

This tutorial (despite it's name) offers chat capabilities for as many as four phones that have the apk installed. It may help.

Also this app might be useful