Groundwire: VoIP SIP Softphone

Groundwire: VoIP SIP Softphone

Best softphone SIP dialer

119 ratings
479 reviews
#15 in paid Productivity
📊 Productivity
$9.99
In-App Purchases

Details

Released
August 18, 2010
Updated
October 9, 2026

Features

Groundwire: VoIP SIP Softphone screenshot #1 for iPhone
Groundwire: VoIP SIP Softphone screenshot #2 for iPhone
Groundwire: VoIP SIP Softphone screenshot #3 for iPhone
Groundwire: VoIP SIP Softphone screenshot #4 for iPhone
Groundwire: VoIP SIP Softphone screenshot #5 for iPhone
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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
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What users say about Groundwire

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What's New in Groundwire

26.1.12

October 9, 2026

- Fixed DTLS 1.2 transcript hashing issue - Fixed a crash when opening the app after updating to 26.1.8

2

Subscriptions & In-App Purchases

$24.99

ZRTP For Outgoing Calls

End to end encryption for your calls

Charts

Top Paid

📈 15+1

Productivity

This app rose +1 position in Productivity chart.

Last updated on October 16, 2026.

Top Paid

📈 138+13

Global

This app rose +13 positions in Global chart.

Last updated on October 16, 2026.

User reviews

Great sip

I have been using this for 6 months without any issues. Very reliable

Satisfied my needs

Call notifications in idle mode was a necessity for me it just works fantastically on Groundwire. Loved the application. Although UI could be improved more. But loved it overall so far.

Fantástico

Se pudesse daria mim estrelas estava há um ano tentando um aplicativo que funcionasse o iOS aí o chat gpt me recomendou esse pois o mesmo trabalha em push sendo assim não tenho mais problema de não receber ligações quando o aplicativo fica inativo , fantástico um ano procurando algo do tipo, parabéns !!!!
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Response from developer

Muito obrigado pelas palavras e pela recomendação! Ficamos muito felizes em saber que o push resolveu esse problema para você e que finalmente encontrou uma solução confiável.

Probleme seit iOS 27 funktioniert nichts mehr

Seit dem Update auf iOS 27 funktioniert die Audioübertragung bei eingehenden Anrufen nicht mehr. Beim Entgegennehmen eines Anrufs tritt einer von drei Fehlern auf: entweder wird der Anruf sofort wieder abgewiesen, oder es kommt gar keine Verbindung zustande, oder die Anrufoberfläche wird von selbst weggewischt, ohne dass ich das ausgelöst habe. Das passiert inzwischen bei fast jedem Anruf. Seit dem Update ist die App für eingehende Gespräche praktisch unbenutzbar. Der zeitliche Zusammenhang mit iOS 27 ist eindeutig, vorher gab es dieses Problem nicht. Getestet auf einem iPhone 17 Pro. Ich bitte um eine schnelle Prüfung und ein Update, das dieses Verhalten behebt.
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Response from developer

Vielen Dank für die ausführlichen Informationen. Bitte kontaktieren Sie uns unter support@acrobits.net und senden Sie uns, wenn möglich, ein SIP-Log, damit unser Team das Problem genauer untersuchen kann. Eine Anleitung zum Exportieren des SIP-Logs finden Sie hier: https://faq.acrobits.net/exporting-sip-logs

This one actually works

I recently ditched my BT landline (after being fed up being charged £44/month for something I rarely used) , but wished to retain my number as a VoIP incase any previous contacts or “older people” dialled it. Got the VoIP credentials from my provider and tried several “free” VoIP apps like Wave, Zoiper etc. None of them worked. I could either make calls but not receive them or vice versa 🙄 Using AI I eventually was guided to Groundwire. Just a few tweaks to the settings and Bingo! Every thing works!
Worth paying the one-off purchase price to save all that hassle with the useless free apps!
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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.