The DAMM TetraFlex® PTT App is a free Android application that enables users to join the DAMM TetraFlex® network as a registered soft terminal. It is a fully integrated part of the TetraFlex® communication system, which means that it requires an existing TetraFlex® infrastructure to work. The TetraFlex® PTT App registers in the TetraFlex® system as a soft terminal with its own SSI number and user number, and it supports group calls and communication with all terminal types of the subscriber register.

The TetraFlex® PTT App also supports simplex and duplex calls and SDS to and from TETRA or DMR Radios, other soft terminals, DAMM Dispatchers, and other compatible units connected to the DAMM TetraFlex® infrastructure. Additionally, it provides protection against accidental activation of the PTT button. Users who are already familiar with the functionality and operation of the DAMM Dispatcher will find the TetraFlex® PTT App's features and functions to be similar and easy to use.