Groundwire: VoIP SIP Softphone 4+

Best softphone SIP dialer


    • 9,99 €
    • Offers In-App Purchases

iPhone Screenshots


Acrobits Groundwire: Elevate Your Communication

Acrobits, a leader in UCaaS and communication solutions for over 20 years, proudly introduces the Acrobits Groundwire softphone. This top-tier SIP softphone client offers unmatched voice and video call clarity. A softphone designed for both personal and professional use, it seamlessly integrates quality communication with an intuitive interface.


Groundwire is a SIP Client, not a VoIP service. You must have service with a VoIP provider or PBX that supports use on a standard SIP client to use it.

Choosing the Best Softphone App

Experience robust communication with a leading SIP softphone application. Preconfigured for major VoIP providers, this softphone app guarantees high-quality, secure, and intuitive calling. Perfect for maintaining connections with friends, family, and colleagues, maximizing all aspects of your VoIP experience.

Key Features of the SIP Softphone
- Exceptional Audio Quality: Enjoy crystal clear audio with support for multiple formats including Opus and G.729.
- HD Video Calls: Conduct up to 720p HD video calls, supported by H.264 and VP8.
- Robust Security: Our SIP softphone app ensures private conversations with military-grade encryption.
- Battery Efficiency: Thanks to our efficient push notifications, you can stay connected with minimal battery drain.
- Seamless Call Transition: Our VoIP dialer smoothly switches between WiFi and data plans during calls.
- Softphone Customization: Tailor your SIP settings, UI, and ringtones.
- 5G and Multi-Device Support: Ready for the future, compatible with most mobile operating systems.

Other features included on this robust app include: instant messaging, attended and unattended transfers, group calls, voicemail, and extensive customization for each SIP account.

More Than Just a VoIP Softphone Dialer

Groundwire softphone offers more than the standard VoIP dialer experience. It’s a comprehensive tool for crystal clear Wi-Fi calling, equipped with robust business VoIP dialer features. It offers a secure and reliable softphone choice with no hidden fees and a one-time cost. Leverage SIP technology for improved call quality. Make this softphone your first choice for dependable, and easy SIP communication.

Download a feature-rich and modern SIP softphone now and be part of a community enjoying the best in voice and SIP calling. Transform your daily communication with our exceptional VoIP softphone app.

What’s New

Version 5.10.0

- Stability improvements

Ratings and Reviews

4.2 out of 5
66 Ratings

66 Ratings

DirkKn ,

Wieder besser geworden

seit dem letzten Update. Die Bedienung ist jedoch nach wie vor sehr träge. Nach einem Tastendruck auf einen Favoriten dauert es ca. 2 Sekunden, bis der Anruf startet.

Developer Response ,

Hello, we do mention the auto-renewing nature of Wifi Finder on many places, although only in English. We'll be adding German translation in the next update.

We also plan adding an option to hide the WiFi finder; we recognize that for some Groundwire users it is not useful. As for the SIP functionality, if you have any specific issues with the SIP functionality of the app, please let us know.

Gri447 ,

am iPhone sehr gut

Läuft am iPhone sehr gut, am iPad leider nur die gezoomte Version, am M1 Mac startet es gar nicht, was sehr schade ist, da man sich dann an bestimmten Orten ein Gerät sparen könnte.

stoamandl ,

Integration in Carplay fehlt - sonst perfekt

Funktioniert bei mir absolut zuverlässig sowohl bei eingehenden als auch bei ausgehenden Anrufen mit z.Zt. drei VOIP-Accounts.
Perfekt wäre noch eine Integration ins Carplay-Menü. Die Apple Phone-App integriert zwar Groundwire gut, so daß eingehende Anrufe auch am Carplay-Display angenommen werden können und schonmal über Groundwire gewählte Ziele über die Wahlwiederholung auch angewählt werden können. Aber für Anrufe aus dem Telefonbuch oder neue Rufnummern ist es beim Fahren umständlich, da man das Gerät (illegalerweise) zum Wählen in die Hand nehmen muss.

App Privacy

The developer, Acrobits, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Contact Info
  • Identifiers
  • Diagnostics

Privacy practices may vary based on, for example, the features you use or your age. Learn More


  • Siri

    Get things done within this app using just your voice.

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