2-Way Radio Apps

[Foreigner]

Interesting review of apps which work on different smartphones, providing instant communication over Wi-Fi:

http://www.nytimes.com/2012/09/06/t...7048067-O7/BuAdE0w20bqIIJvM1pA&pagewanted=all

I've downloaded Zello and Voxer and hope to try these with family and friends to see if they are useful.