# Groundwire: VoIP SIP Softphone — Best softphone SIP dialer

> SIP softphone client for high-quality voice and video calls. (iPhone/iPad app by Acrobits.)

- Source: https://appshunter.io/ios/app/groundwire-voip-sip-softphone/id378503081 (this page in markdown: same URL + `.md`)
- Developer: [Acrobits](https://appshunter.io/developer/314192802)
- Category: Productivity
- Price: $9.99 with in-app purchases
- Rating: 3.80/5 from 117 App Store ratings · 472 written reviews indexed
- Age rating: 17+
- Requires: iOS 16.0 · 88 MB
- Languages: American English, Arabic, Bulgarian, Czech, Danish, Dutch, French (France), German (Germany), Hebrew, Hungarian and 18 more
- Released: 2010-08-18
- Data updated: 2026-08-28
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/groundwire-voip-sip-softphone/id378503081/reviews.md

## What is Groundwire?

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.

IMPORTANT, PLEASE READ

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.

## Key features

- 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

## Pricing and in-app purchases

Base price: $9.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| ZRTP For Outgoing Calls | $24.99 | one-time |


## Chart rankings

- #15 in Top Paid · Productivity (US App Store)

## What do users think of Groundwire?

Overall sentiment: positive

**Pros**

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

**Cons**

- 🐛 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

**Commonly reported bugs**

- Dropped calls and registration issues
- Keypad not working during some calls
- Call history pagination problems
- Contact search functionality broken

**Most requested features**

- Dark mode or high-contrast theme
- Native iPad support
- SMS/text messaging integration
- Ability to select system ringtones
- Improved Bluetooth device handling

## Recent user reviews (10 of 472)

All indexed reviews: https://appshunter.io/ios/app/groundwire-voip-sip-softphone/id378503081/reviews.md

### 1/5 — No encrypted calling

*2026-08-03, version 25.3.101*

Turning on encrypted calling blocks connection to voip.ms server

### 2/5 — Faulty

*2026-08-03, version 25.3.101*

Calls are unclear and not receiving text messages

### 5/5 — Consistent and Reliable

*2026-07-16, version 25.3.100*

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

### 5/5 — 満足です！

*2026-07-04, version 25.3.93*

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。

### 5/5 — 音質がいい！

*2026-07-03, version 25.3.93*

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。

### 5/5 — 通話切れない

*2026-07-03, version 25.3.93*

音質が良く、通話中も途切れにくくて安心して使えています。操作もシンプルでわかりやすく、初めてでも迷わず使えるのが良かったです。全体的に安定していて、とても使いやすい電話アプリだと思います。

### 5/5 — 使いやすい

*2026-07-03, version 25.3.93*

音質も聞き取りやすく会話がスムーズに出来るため仕事で使っています。アプリ自体設定など簡単にできたので使いやすくなってます。

### 5/5 — 1番安定して利用できる

*2026-07-03, version 25.3.93*

このアプリは細かい設定も可能でアップデートも早く、1番安定して利用できる

### 2/5 — 複数チャンネル使用時

*2026-06-27, version 25.3.93*

未登録番号の場合には、どの番号に掛かってきたは分かりますが、電話帳に登録している番号に関しては、どの番号に掛けてきているのか判別が出来ないので、非常に不便。

### 1/5 — This app no longer runs in the background

*2026-06-26, version 25.3.92*

You can’t really use this as a SIP softphone

## Frequently asked questions about Groundwire

### 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.

## Version history (last 5 releases)

### 25.3.101 — 2026-07-20

- Implemented compliance with the Declare Age Rating API

### 25.3.100 — 2026-07-09

- Performance and stability improvements

### 25.3.93 — 2026-06-26

- Performance and stability optimizations

### 25.3.92 — 2026-06-25

- Implemented compliance to Declared Age Range API

### 25.3.89 — 2026-06-08

Improved Dutch translation
Fixed a crash when unread header is out of sync
Fixed incorrect attachment notification text when app is in background
Fixed local push reconnection issue after temporary network loss

## Apps similar to Groundwire

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Bria - VoIP Softphone](https://appshunter.io/ios/app/bria-voip-softphone/id1074064248) | 4.5 (992) | Free | Productivity |
| [Sangoma Talk](https://appshunter.io/ios/app/sangoma-talk/id1522533280) | 3.2 (89) | Free | Productivity |
| [Ham2K Portable Logger](https://appshunter.io/ios/app/ham2k-portable-logger/id6478713938) | 4.7 (49) | Free | Productivity |
| [Zoiper Premium voip soft phone](https://appshunter.io/ios/app/zoiper-premium-voip-soft-phone/id787863350) | 3.5 (132) | $4.99 | Productivity |
| [Zoiper Lite voip soft phone](https://appshunter.io/ios/app/zoiper-lite-voip-soft-phone/id438949960) | 4.4 (1,672) | Free | Productivity |
| [Cloud Softphone](https://appshunter.io/ios/app/cloud-softphone/id567475545) | 3.5 (77) | Free | Productivity |

## More apps by Acrobits

- [Acrobits Softphone](https://appshunter.io/ios/app/acrobits-softphone/id314192799)

All apps by Acrobits: https://appshunter.io/developer/314192802

## Related topics

[acrobits groundwire](https://appshunter.io/ios/topics/acrobits-groundwire) · [acrobits](https://appshunter.io/ios/topics/acrobits) · [acrobits softphone](https://appshunter.io/ios/topics/acrobits-softphone) · [voip softphone](https://appshunter.io/ios/topics/voip-softphone) · [sip pulse pro](https://appshunter.io/ios/topics/sip-pulse-pro) · [sip communication](https://appshunter.io/ios/topics/sip-communication)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*