Overview System Requirements Related


The TopSec Phone app is a VoIP client for encrypted voice communications. For maximum security, voice recording, playback and encryption take place in a small wireless handset called “TopSec Mobile”. The app offers easy-to-use features for creating and updating phone book entries, a favorite list and VoIP server registration, as well as Bluetooth pairing with TopSec Mobile.


Additional information

Published by

Rohde & Schwarz SIT GmbH

Developed by

Rohde & Schwarz SIT GmbH

Release date


Approximate size

2.91 MB

Age rating

For all ages

This app can

Use your microphone
Bluetooth device
Use your contacts
Access your Internet connection and act as a server.


Get this app while signed in to your Microsoft account and install on up to ten Windows 10 devices.

Language supported

English (United States)
Deutsch (Deutschland)

Additional terms

Terms of transaction

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