Seriously, 99 cents would get me a cheap cheeseburger, something endlessly more satisfying than this app.
Doesnt take advantage of any kind of notifications, so both devices have to be actively on the app for it to _attempt_ to work (emphasis to attempt); extremely cryptic and maddeningly frustrating in searching for other devices, doesnt reliably connect, and if/when it does, the connection lasts about four or five words, and then gives up and goes back to searching for other devices.
Add to that, it uses Bluetooth solely, which is a real battery drainer.
Monomax about Bluetooth Walkie Talkie