Secret Conversation Transceive is a free Android app developed by TansuG that allows voice communication between two smartphones using Bluetooth. It turns your smartphone into a transceiver, enabling you to send and receive voice messages without an internet connection.

To use the app, you need to turn on the Bluetooth setting on both smartphones and acquire a new device from the menu. After that, a list of devices that can be connected is displayed, and pairing is performed by pressing the terminal you want to connect. Once the pairing is finished, you can start the call on the call screen, and the voice is sent to the other party's terminal. However, your voice will not be sent until you press the start of the call.

The app is straightforward to use, and it's an excellent alternative to other voice communication apps that require an internet connection. The only downside is that the app uses the connection to the internet for advertisement. Overall, Secret Conversation Transceive is an excellent app for those who want to communicate through voice messages without an internet connection.