Swyx has revamped its mobile app for IOS and Android operating systems to make and receive calls over 4G, 3G or Wi-Fi data connections.
Conversations can be held with other Swyx users on the same network from any location without additional costs.
The app supports Adaptive User Interface technology that automatically shows different screen displays for both smartphones and tablets.
Users also see mobile presence and status information for all corporate contacts.
The app and a new desktop version for Apple OS X will be available to download from app stores by the turn of the year.
"The development and redesign of our Swyx clients in the 2015 version reflect the increasing requirements and demands of our customers for agility and flexibility in today's modern workplace," said Swyx CEO Dr. Ralf Ebbinghaus.
"Supporting new platforms and devices, such as the use of UC features on tablets and also on Apple OS X, enables us to tap into new target markets for our solution."
The latest version of SwyxWare also offers an alternative touch-optimised user interface for Windows 8 environments and new options for secure connections outside of the corporate network without the need for a VPN.