NPTT - Network Push To Talk App from Radio-Shop UK
This app has been designed to turn your mobile phone into a two way radio. it allows users to talk to other users instantly using the mobile phone network.
Simply push to talk with no dialing and no need to wait for the phone to ring. The app is perfect for security companies and incident management as you can visually see where your staff and clients are on the map screen.
The app also has a panic alarm facility which you press and hold activating alarm to other users and notifying them of your location and you need assistance.