WiFi Walkie Talkie is a Push-to-Talk application which allows you to talk for free over wireless networks.
With this application, you can transmit your voice data to all devices which are on the same network or to any device which you know its IP address.
How can you use this app?
If you want to send voice message to a single user, press the Unicast button and insert the IP address that you want to talk with.
Push to speak button, hold and speak.
https://play.google.com/store/apps/details?id=com.webstar.walkies
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