Acrobits - softphone

Acrobits Softphone is my new favorite VoIP SIP client.

Terry White

Acrobits Softphone, the go-to SIP Client on the App Store

Since its release, Acrobits Softphone has become synonymous with SIP on the iPhone.  Starting with push notifications and continuing with the G.729 Annex A audio codec, multitasking, and now GoogleVoice integration, Acrobits has made sure users of the Softphone have a reliable, highly customizable SIP Client that utilizes all the latest capabilities of iOS.  Join thousands of satisfied customers now and try Acrobits Softphone, the leading SIP Client on the App Store.


  • New - Video Calling Click here for a demonstration
  • Push Notifications, a reliable way to receive calls when Acrobits Softphone is closed
  • Multitasking background support for iOS4 and later
  • GoogleVoice integration
  • Customizable ringtones, choose from our selection or pick something from your iTunes library
  • HD wideband audio through G.722
  • Support for Opus codec, narrowband and wideband
  • Excellent sound quality, includes the G.711, GSM and iLBC audio codecs.  Make an in app purchase to add G.729 Annex A for great quality over 3G
  • Background Noise Suppression and Echo Suppression
  • NAT Bridge Service, for solving audio issues over 3G
  • in-call quality indicator, see network quality, packet loss and jitter
  • SMS support for betamax providers, pennytel and sipme
  • Number rewriting, enabling you to utilize your existing contacts without having to create new entries to satisfy the dialing requirements of your PBX or SIP provider
  • Address Book Matching to automatically format your incoming numbers to match your existing contacts
  • TLS support for encrypted SIP
  • SRTP, both SDES and ZRTP for secure audio on SIP calls, check out our knowledgebase article for more details
  • Bluetooth support for iOS 3.1 and higher (iPhones, iPad 2 and iPod Touch 4th Generation only)
  • iOS4 backgrounding support
  • Audio codec manipulation, enabling you to prioritize the codecs used and disable ones you don't want to use.
  • Call recorder and player, seamlessly integrated into the call history
  • Comfortable and super-smooth user interface, fine-tuned specially for the iPhone
  • Full localization (currently English, Chinese, Danish, Korean, Norwegian, Polish, Portueguese, Swedish, French, German, Italian, Russian, Spanish, Czech and Slovak)
  • Very easy configuration
  • Simultaneous registration of multiple SIP accounts, have multiple accounts registered to receive incoming calls and switch the account used for outgoing calls without leaving the keypad
  • iPhone contacts integration, easy to call anyone in your contact via SIP
  • Contacts search function
  • Add new contacts directly from Groundwire
  • Quickdial, your 12 favorite contacts are one touch away
  • Ability to generate DTMF tones while in call, to control various PBX features or automated systems (use audio, rfc2833 or SIP INFO)
  • Speakerphone support
  • Detailed call history, with intelligent call grouping for an easy overview New: history search
  • Support for sip:username URIs in contacts
  • Configurable RTP port range
  • SIP Proxy support, VPN support
  • IPv4
  • Quick import of accounts from major VoIP providers, including callcentric, sipgate, voipcheap and many more. New: search function, filter by popularity or name
  • Phone number resolution, we present the phone numbers in a convenient format with grouped digits, display the flag and country name and even the region/city name for some countries, including USA New: built in country codes, enter + on the keypad, then tap on the globe and select the country you want to dial

Remember, Acrobits Softphone is a SIP client.  You will need to have service with a VoIP provider or PBX that supports use on a standard SIP client to use it.

GoogleVoice users:  Though we have integrated GoogleVoice, Acrobits Softphone's main use is as a SIP client.  You can setup Acrobits Softphone to initiate GoogleVoice calls through other types of numbers, but to get the full functionality of Acrobits Softphone, you need to have GoogleVoice linked to a SIP Account.