The app reads an incoming text message via the speech synthesis of the mobile device.
Optionally it can look up the calling number in the phone book and read out the name of the caller.
For this to work the app requests permission to receive and read text messages. To lookup up the contact, the read contacts permission is used. If a text message is read via the speaker and an incoming phone call is detected it immediately stops to let you answer the call, for this to work the phone state permission is requested from the system.
The app does not use internet services, does not request the Internet Permission and will not send information to other systems or third partys.