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Groundwire: VoIP SIP Softphone

Groundwire: VoIP SIP Softphone

Best softphone SIP dialer

117 ratings
472 reviews
#18 in paid Productivity
📊 Productivity
$9.99
In-App Purchases

Details

  • Released
  • Updated
  • August 18, 2010
  • July 20, 2026

Features

Developer

Acrobits
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Groundwire: VoIP SIP Softphone screenshot #1 for iPhone
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Groundwire: VoIP SIP Softphone screenshot #5 for iPhone
🧾$24.99
In-App Purchase↘︎
📉no. 18
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📌Ready
Reviews summary↘︎
⭐472
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❓5 answered
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About

This SIP softphone client provides high-quality voice and video calls with robust security and customization options. It integrates seamlessly with VoIP providers for personal and professional use, offering features like instant messaging and call transfers.

✓Exceptional audio quality
✓HD video calls
✓Robust security with encryption
✓Battery efficient push notifications
✓Seamless call transition
✓Customizable SIP settings and UI
✓Instant messaging and group calls
Show original description

What users say

Summarized from real user reviews of Groundwire. Based on 117 reviews and a 3.8/5 average, it highlights the 7 positives and 6 negatives reviewers mention most about this Productivity app.

Positive things

  • 🚀Reliable and stable
  • 🔒Secure calls with ZRTP
  • 👍Customizable and feature-rich
  • 🚀Excellent call quality
  • 👍Great customer support
  • 🚀Seamless background operation
  • 👍Intuitive and user-friendly

Negative things

  • 🐛Crashes and lost settings after updates
  • 🔋High battery consumption
  • 👎Outdated and cluttered UI
  • 🐛Unreliable push notifications
  • 👎Compatibility issues with newer iOS versions
  • 🔋Slow to establish calls
See all reviews

What's New in Groundwire

25.3.101

July 20, 2026

- Implemented compliance with the Declare Age Rating API

2

In-App Purchases

$24.99

ZRTP For Outgoing Calls

End to end encryption for your calls

Charts

Top Paid

📉 18-5

Productivity

This app dropped -5 positions in Productivity chart.

Last updated on August 20, 2026.

User reviews

Most RecentHighest RatedLowest Rated

No encrypted calling

Turning on encrypted calling blocks connection to voip.ms server
thisIsHowItIsthisIsHowItIs

Faulty

Calls are unclear and not receiving text messages
Sun-kissed SanSun-kissed San

Consistent and Reliable

I have been using Groundwire for years and it has consistently worked for me for work calls domestically and overseas. At times, the quality of the phone calls are not as crisp as I would like. I have tried other apps but always come back to Groudwire
riot jawsriot jaws

満足です！

シンプルで無駄がなく使いやすい。
言う事無しなので⭐︎5付けさせて頂きました。
kou.maedakou.maeda

音質がいい！

通話音質がとてもクリアで、相手の声も聞き取りやすいです。接続も安定していて、仕事で安心して使えています。操作もシンプルで使いやすく、おすすめできるアプリです。
@ぜにがめ@ぜにがめ
See 467 more reviews

Developer apps

Acrobits Softphone
Acrobits Softphone

Reliable softphone dialer

📊 Productivity

(47)

$6.99
In-App Purchases
See developer apps

User experience

🐞

Reported Bugs

4 issues

Dropped calls and registration issues

Bug

Keypad not working during some calls

Bug

Call history pagination problems

Bug

Contact search functionality broken

Bug
✨

Requested Features

5 requests

Dark mode or high-contrast theme

Feature

Native iPad support

Feature

SMS/text messaging integration

Feature

Ability to select system ringtones

Feature

Improved Bluetooth device handling

Feature

FAQ

What is Groundwire: VoIP SIP Softphone?

Groundwire is a SIP softphone client that allows you to make high-quality voice and video calls over the internet. It is designed for both personal and professional use, offering a secure and intuitive communication experience.

Do I need a separate VoIP service to use Groundwire?

Yes, Groundwire is a SIP client and requires a service from a VoIP provider or PBX that supports standard SIP clients. It does not provide the VoIP service itself.

What are the key features of this softphone app?

Key features include exceptional audio quality with support for Opus and G.729, HD video calls up to 720p, military-grade encryption for security, battery-efficient push notifications, seamless call transitions between Wi-Fi and data, and extensive customization options.

Is Groundwire compatible with different devices and networks?

The app is compatible with most mobile operating systems and supports 5G connectivity. It also features seamless call transition, allowing it to switch between Wi-Fi and data plans during calls without interruption.

What is the cost of using Groundwire?

The application has a one-time cost with no hidden fees. This makes it a straightforward and dependable choice for SIP communication.