Best VoIP Softphone for iPhone Users


It can be difficult to choose the best VoIP softphone for iPhone users, especially with the wide variety of softphones available today. After doing some research, we found there are a number of options on the market that can fit many of your business needs. In the past, we've noted that the VoIP softphone offered in the AVOXI Genius platform is our top web-phone for desktop performance, but what about for mobile-users? To help make your decision a little easier, we downloaded a variety of apps, tested them and compiled a list of our favorite VoIP softphone applications.

Best VoIP Softphone for IPhone Users

1. Bria 4


The Bria 4 is a next generation softphone that allows you to manage your communication needs efficiently, no matter where you are.  It allows you to make VoIP and video calls over IP, see when your contacts are available, send instant messages, and easily transfer files.

Bria's 4 release offers new features, such as a multiple license key capability that allows retail users to further enhance their communication software with add-ins and services like screen sharing and an integration for Outlook.

The Bria iPhone Edition, a SIP-based phone designed with the needs of iPhone or iPod touch users in mind, makes and receives calls using a Wi-Fi or data network connection.  Drawing on your existing iPhone or iPod contact list, you can manage communication through the Bria iPhone Edition's user-friendly interface.  Additional features include the capability to merge and split calls, complete attended and unattended transfers, and more.

Bria's iPhone Edition also includes features designed specifically for business and enterprise users, like audio encryption and secure call signaling.



  • Attractive, user-friendly interface
  • Many features
  • Great for video conferencing
  • Different versions and platforms
  • Easy and efficient software


  • Expensive
  • VoIP app requires a lot of memory, recommended 2 GB

2.  ZoiPer


ZoiPer is another popular VoIP softphone for iPhone users. Available for both SIP and IAZ systems, ZoiPer is a reliable option for service providers, call centers or any business looking to benefit from VoIP communications.  Unlike some of the other softphones on this list, ZoiPer allows you to integrate with the provider of your choice, or even a combination of providers.

The ZoiPer VoIP softphone is great for handling contacts and integrates well with mail clients such as Outlook, Thunderbird and Lotus Organizer.  Its multi-tabbed interface allows you to view all call logs and effortlessly change statuses to away or be right back.  By clicking the Contacts tab, you can manually add contacts from another source, or find contacts that are already available.


  • Video calls are effective
  • Manages all contacts well
  • Integrates well with various mail clients


  • Some reviews state the new app version crashes on opening.
  • We received an error when configuring setup: 63, network unavailable. This error means that the non-ZoiPer service contact you are trying to reach is offline, or they are using an unsupported PBX server.


3.  Media5-Fone


Media5-Fone is a free SIP client app that allows users to make and receive calls from wireless networks, including Wi-Fi, 3G, 4G, and LTE. This app offers great voice quality and gives you control over how you consume your bandwidth and tune your voice quality.

Media5-Fone has a wide variety of useful features, such as call waiting, call toggle, call transfer, 3-way conferencing, and switching between multiple SIP accounts.  However, it is important to note that some of these features are only available when you upgrade to the paid service.

One feature that sets Media5-Fone apart from its competitors is the multitasking environment in the new iOS.  This allows other applications run on the phone while the app operates in the background. It then pops up with a notification when a call is coming in.


  • Full suite of features
  • Works in the background
  • Easy to set up and use


  • Some versions only available for iOS and some Android devices
  • May be restrictions for some mobile network operators that restrict VoIP over their 3G data plans

4. 3CX


Another great choice is the 3CX Phone app, which has been recognized for its sleek and user-friendly design, as shown above.  3CX is available for mobile platforms, including iOS and Android, as well as desk top platforms, such as Windows and Mac OS.

If you are looking for more than just a softphone, this is a great option.  3CX can be used as a PBX office phone system for businesses, and it's very easy to install. 3CX also provides many of the standard VoIP features such as call recording, blind transfers and call forwarding.


  • Sleek and user-friendly interface
  • Can be used as a PBX office phone system


  • Some users experienced crashing

Whether you're searching for the right softphone client for personal use, or to meet the unique needs of your business, there are a wide variety of VoIP softphones available for iPhone users. We hope this overview will be a helpful guide as you search for the right option for your business.