Groundwire: Business SIP Phone

Groundwire: Business SIP Phone

By Acrobits

  • Category: Productivity
  • Release Date: 2010-08-18
  • Current Version: 3.6
  • Adult Rating: 4+
  • File Size: 49.08 MB
  • Developer: Acrobits
  • Compatibility: Requires iOS 10.0 or later.
Score: 4
From 40 Ratings


Designed from the ground up with the mobile user in mind, Groundwire is the first mobile SIP Client capable of replacing your desktop phone.  Combining all the features business users need (see below) with intuitive features created with the mobile user specifically in mind (number rewriting, address book matching and more), Groundwire will quickly have you wondering how you survived without it before. Check out the tutorials and knowledgeable articles at the links below: For the list of providers and VoIP services tested with Groundwire, see And check out for a side by side comparison of the most popular features of Acrobits Softphone and Groundwire. *CallKit support! *Push Notifications for long battery life *Video Calling - H263, H264 and VP8 codecs *Multi line *Call conferencing *Transfer and attended transfer *Call waiting *Voicemail Notification and programmable Voicemail dialer *ZRTP support (through in app purchase), the latest in secure calling for SIP *enterprise support for SMS through SIP SIMPLE *SMS support for betamax providers, pennytel and sipme *backgrounding support *Call recording (only available for SIP calls, will not record calls from your GSM line) *Bluetooth headset support (iPhones, iPad 2+ and iPod Touch 4+ only) *Customizable ringtones *Quickdial, your favorite contacts only one tap away *Number rewriting, edit your existing contacts for SIP dialing without creating additional entries and program specific number to be dialed through specific accounts automatically *in-call quality indicator, see network quality, packet loss and jitter *Background noise suppression *Quick import of accounts from major VoIP providers including sipgate, callcentric, voipcheap and many more. *TLS support for encrypted SIP *SIP Proxy Support, VPN Support (configure VPN in iOS settings) *Excellent sound quality, supports OPUS, G.722, G.711, iLBC and GSM.  Make an in app purchase to add G.729 for great performance over 3G networks *SIP Log for troubleshooting Groundwire fans, please rate Groundwire or leave a review.   If you have an issue with Groundwire, please contact our support even if you leave a review stating the problem.  We are unable to respond to reviews so even if your issue is simple to resolve, we have no way of letting you know.  Groundwire is highly configurable so problems that seem insurmountable may just require a couple of adjustments to the settings.     ***NOTES - IMPORTANT, PLEASE READ*** SIP - 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. VoIP over 3G - Be aware that some mobile network operators prohibit or restrict the use of VoIP over their network.  They may prohibit the use of VoIP or impose additional fees and/or charges when using VoIP over their network.  By using Groundwire over 3G, you agree to abide by any restrictions your cellular carrier imposes and agree that Acrobits will not be held responsible for any charges, fees or liability imposed by your carrier for using Groundwire over their 3G network.



  • Actually works

    By Baller_88
    I tried almost all the free SIP apps, and then a trial of Bria and had no luck (I almost gave up on iOS SIPs altogether). With ground wire it really is native, when you get a call it’s just like a regular call even when you close down the app as if some other server is taking care of the job and not the app and sending it to apple. This is more evident because after the call the app remains unopened, it’s the only app I’ve ever seen that is like this — it’s comparable to sending WhatsApp messages on the iOS messaging service.
  • Excellent

    By Danbs10
    App is awesome and the customer service is top notch!
  • Far better than Bria

    By The VoIP People
    Have had to stop recommending Bria to my cloud Voip customers since they moved to their subscription model that promises features at extra cost that are included for the one-off fee for Groundwire. However, I wish I had found Groundwire years ago because it performs so much better, especially when it comes to incoming calls. Doesn’t matter whether the app is in foreground mode, background mode, in lock-screen mode or even not yet started, this app will ring as normal, just needing a swipe to answer. None of the notification banner, fingerprint or passcode entry, that Bria has which means you almost inevitably miss the call with all the messing about. And the battery life isn’t affected too much - brilliant, I’m happy with the user interface, very similar to native iPhone app.
  • Used to be good now rubbish

    By EmRogers87
    Something has been changed on this app have had to have our support out several times - not connecting and now evertime my screen lock comes on the app closes - the settings apparently removed on the update to stop this. Working from home and I cannot use my phone for anything else as it closes app now. Working in sales I have missed calls and I'm fed up with it, it's draining my battery - I have to take the lock screen and change to never sleep to keep app running. VPN is always timing out and when I'm working you don't check your phone every 5 minutes to see if it's connected. In trouble with work have to just divert calls to my mobile now app is useless!
  • The best VOIP app on iOS

    By AppleID:7523825
    This is the best SIP app your phone will ever have and it integrates into the phones calling system as if it was a regular call inbound or outbound. Other apps are useless and don't do this plus they need to be running to get calls. This app works like magic. I really have tried all other VoIP apps and this one is the best without question. It may be expensive and initially I really didn't want to pay but now I think it was very much worth it. The developers are very good and the app is always updated. ZRTP is a requirement for secure calls but only if your provider supports it.
  • Brilliant app and awesome customer service

    By André Borie
    This app is brilliant and works perfectly. It also doesn't drain your battery as your device doesn't always maintain a connection to the SIP server (they maintain it through their proxy and ping your device via push if a call comes through). It's also got support for a custom HTTP API for text messaging and their customer support was awesome at helping me implement a server for this. My only complaint is the somewhat outdated UI. Would you mind making it look more like WhatsApp or FB messenger?
  • Excellent app

    By Philippe londres
    This works seamlessly Or company uses VoIPFone and I set up my app as an extension Received and makes calls perfectly
  • Superb

    By Neil_Brown
    Groundwire is my favourite SIP client for iOS by a long way. The recent addition of CallKit integration is excellent.
  • Problematic

    By 10,000 Angry Vegans
    Same issues as almost all iOS sip apps I've tried which is to say inconsistent network performance (regularly won't connect to the provider), dropped calls, amateur interface design (the keypad is just all over the place on my 6S Plus) and basically something you can never fully rely on. Disappointed. Refunded.
  • Best voip app!

    By PunzIII
    Best voip app in the app store, and I've tried them all. Love the push notifications, multiple accounts, different codecs for different accounts, lots of options, very flexible. Update: it would be nice if I could answer an incoming VoIP call without having to unlock my iPhone, just like a native call. Update 2: thank you so much!! Callkit integration in iOS 10 allows just that now! I've been waiting for this for about 5 years! Now it's perfect! Thank you 😊