This app will change your life you can make your android phones tabs as a Walkie Talkie.
You can chat and talk to your friend free of cost not even to only one you can chat or talk to multiple users using very simple steps.
1. Install this app.
2. Put all android phones in one network.
3. Add all IP of other Android phones.

Now You have your Walkie Talkie. You can use this Walkie Talkie in your business Clubs Shopping Malls etc.