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 5.10.8

- Fixed crash when deleting the last entry in call history
- Fixed contacts count for Microsoft and Office 365 contact sources
- Fixed crash when sending AVI attachments
- Fixed local push issue
- Improved call transfer behavior

Ratings and Reviews

3.6 out of 5
70 Ratings

70 Ratings

t3chm@n ,

One issue

I have been using Groundwire for quite a while and do like it very much.
One issue I have is that when calling my Voicemail (*98) the system hangs up.
I also use Bria with same config and don’t have the issue. Just could not find any documentation on the issue or possibility of setting changes.

SanJoseScott ,

Excellent app with a killer feature

This is a great app for family or enterprise use. Great voice quality, flexible options, nice integration with iPhone (and iPad), lovely user interface.

And: After some plowing through Acrobits’ wiki and scratching my head a little, I found it supports external provisioning. That’s wonderful: you can set up simple .xml provisioning profiles on a web server (or even in Dropbox’s public web folder) and give your users a click-link that, when clicked on their iDevice, will automatically set this application up. I’ve encouraged Acrobits to improve the description of how to do this, but if I figured it out you probably can too.

Really great app, and well worth the small amount of money it costs… especially considering the massive savings VoIP brings!

UPDATE: after several years I remain delighted with this app. Call quality, ease of use, iPhone-worthy design... first class stuff.

Developer Response ,

Thank you very much for your kind words!

Dr.X_in_FL ,

The best Softphone Sips app out there

I was looking for a softphone app to use with my new voip provider, and this was recommended to me.

Well what an app it is! There are lots of features including call recording, and what i love is I can have more than one line / provider configured with it!

Now I did have some questions / issues and reach out to the developer using there help desk ticket systems and they answer right away and the reply’s were great! Giving me the information I needed to get it sorted!

Thanks again guys and keep the great work up!

Quality of sound is amazing!

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, for example, based on the features you use or your age. Learn More


  • Siri

    Get things done within this app using just your voice.

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