Acrobits UCaaS & Branded VoIP Apps

Create best-in-class white-label softphone solutions today — not tomorrow.

FOR BUSINESSES

Cloud Softphone

Create your customized white-label softphone solution with Cloud Softphone. Design, build, and deploy your VoIP app quickly.

White Label Softphone →

FOR BUSINESSES

LinkUp

Try LinkUp for a custom white-label video conferencing solution. Add your branding elements to the user interface for a unique experience.

White Label Video Conferencing →

FOR INDIVIDUALS

Softphone Apps

Enhance your VoIP experience with softphone app solutions powered by the industry-leading Acrobits SDK.

Softphone Apps →

FOR DEVELOPERS

Softphone SDK

Test the developer-friendly Acrobits VoIP SDK. Quickly integrate it with your favorite apps with our powerful API.

Softphone SDK →

FOR BUSINESSES

Cloud Softphone

Create your customized white-label softphone solution with Cloud Softphone. Design, build, and deploy your VoIP app quickly.

White Label Softphone →

FOR BUSINESSES

LinkUp

Try LinkUp for a custom white-label video conferencing solution. Add your branding elements to the user interface for a unique experience.

White Label Video Conferencing →

FOR INDIVIDUALS

Softphone Apps

Enhance your VoIP experience with softphone app solutions powered by the industry-leading Acrobits SDK.

Softphone Apps →

FOR DEVELOPERS

Softphone SDK

Test the developer-friendly Acrobits VoIP SDK. Quickly integrate it with your favorite apps with our powerful API.

Softphone SDK →

Your vision, our expertise

Industry Leader

Trusted Worldwide

Bespoke Design

Broad Spectrum

500+

Active white-labels apps on the market

500+

User Confidence

600k+

Users on client apps

Tailored Precision

300+

Customizations options

300+

Let's craft something extraordinary

Book a demo

Cloud Softphone & LinkUp UCaaS Apps

Upgrade your communications with Cloud Softphone and LinkUp. Explore over 100 premium features to customize and build a white label UCaaS app.

Enhance your UI/UX with seamless branding across devices.

Discover Watch video

Instantly add video conferencing
to your apps with LinkUp

Explore LinkUp →

All the softphone features you need to compete

Cloud Softphone
VIdeo Conferencing

iOS apps

Download softphone apps directly from the App Store.

iOS Softphone Apps →

Android apps

Download softphone apps directly from the Google Play.

Android Softphone Apps →

Windows native apps

Engineered specifically for exceptional Windows performance.

Windows Softphone →

MacOS native apps

Optimized specifically for the macOS experience.

mac OS Softphone →

Push notifications

Provide instant alerts with stable Push Notifications powered by Local Push.

Push Notifications →

Self service

Control settings, adjustments and provisioning from Acrobits Cloud Softphone Portal.

300+ customizations per OS

Access the most complete array of customizations on the industry.

100+ features

Fit the needs of your industry with highly customizable softphone features.

Softphone Features →

100% native apps

Equip teams with natively built VoIP apps.

Try & buy

Every single feature we offer can be freely tested. Only pay once all is ready.

World class support

Highly specialized support to sort any type of issue.

One click app store updates

Keep your VoIP app secured, up to date, and running smoothly.

Authenticated users

High user maximum

Receive world-class support

Global server infrastructure

Calendar integration

Custom meeting rooms

Call recordings

Keep your clients connected

Meeting history

Voice, video & chat

Screen sharing

PSTN call-in

iOS apps

Download softphone apps directly from the App Store.

iOS Softphone Apps →

Android apps

Download softphone apps directly from the Google Play.

Android Softphone Apps →

Windows native apps

Engineered specifically for exceptional Windows performance.

Windows Softphone →

MacOS native apps

Optimized specifically for the macOS experience.

mac OS Softphone →

Push notifications

Provide instant alerts with stable Push Notifications powered by Local Push.

Push Notifications →

Self service

Control settings, adjustments and provisioning from Acrobits Cloud Softphone Portal.

300+ customizations per OS

Access the most complete array of customizations on the industry.

100+ features

Fit the needs of your industry with highly customizable softphone features.

Softphone Features →

100% native apps

Equip teams with natively built VoIP apps.

Try & buy

Every single feature we offer can be freely tested. Only pay once all is ready.

World class support

Highly specialized support to sort any type of issue.

One click app store updates

Keep your VoIP app secured, up to date, and running smoothly.

Authenticated users

High user maximum

Receive world-class support

Global server infrastructure

Calendar integration

Custom meeting rooms

Call recordings

Keep your clients connected

Meeting history

Voice, video & chat

Screen sharing

PSTN call-in

Build a branded UCaaS softphone app in 45 minutes

Book a demo to build, design, and launch your app while saving 95% on development costs.

Book a discovery call

Softphone apps for iOS and Android

Lifetime license means a one-time fee and no monthly payments.

Groundwire

Incoming Call via Push
Unlimited Accounts
Video Calls
Messaging
Transfers and Conferencing

LEARN more →

Acrobits:
VoIP SIP Softphone

Incoming Call via Push
Unlimited Accounts
Video Calls
Messaging
Transfers and Conferencing

LEARN more →

Business Phone Ios Android Softphone App

Read our blog

Check more here

How ESIM Providers Can Leverage Voice with Acrobits Technology: A Strategic Approach to Customer Retention

Rafael Torreblanca | 28 Apr 2025 VoIP

7 min read

Meet our developer-friendly softphone SDK

The Acrobits SDK simplifies the entire development process.

Learn more →

Busy Lamp Field
Incoming Call
Number Rewriting
Conference Calling

Add busy lamp field integration to your real-time communications platform to see whether users are in an active call.
Allow your users to receive incoming calls more easily by integrating our platforms push to receive functionality.
Streamline and automate the dialing out process with our number rewriting capabilities.
Take advantage of our reliable and easy to use conference calling function that lets you invite more users.

									
									
									
								
Busy Lamp Field

									Powered by Acrobits • α sinch company
								

                                    // Blf status
val dialogInfo = Instance.Registration.getDialogInfo(accountId, uri)
val blfString = if (dialogInfo.busyLamp) "On call" else "Off call"
busyLampStatusLabel.setText(blfString)

// Busy Lamp field iOS
DialogInfo *dialogInfo = Softphone::instance()->registration()->getDialogInfo(uri);

if (dialogInfo) {
    if (dialogInfo->busyLamp) {
        busyLampStatusLabel.text = NSLocalizedString(@"On Call", nil);
    } else {
        busyLampStatusLabel.text = NSLocalizedString(@"Off Call", nil);
    }
}                                

                                    - (void)onNewEvent:(Softphone::EventHistory::Event::Pointer)event
{
    switch (incomingEvent->eventType)
    {
        case Softphone::EventHistory::EventType::Call:
        {
            Softphone::EventHistory::CallEvent::Pointer callEvent = event.asCall();

            UNMutableNotificationContent *notification = [[UNMutableNotificationContent alloc] init];
            notification.title = @"Groundwire";
            notification.body = [NSString stringWithFormat:NSLocalizedString(@"Incoming call from %@", @"notification"), ali::mac::str::to_nsstring(callEvent->getRemoteUser().getDisplayName())];
            notification.sound = [UNNotificationSound defaultSound];

            UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:[[NSUUID UUID] UUIDString] content:notification trigger:nil];
            UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
            [center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error)
            {
                if (!error)
                {
                    // Handle successful notification request
                }
            }];
        }
            break;

        default:
            break;
    }
}                                

									
									
									
								
Incoming Call

									Powered by Acrobits • α sinch company
								

                                    // OnCall
// ******************************************************************
public void onNewCall(@NonNull CallEvent callEvent) {
    val context = AndroidUtil.getContext();
    String messageText = "";

    Class<?> activity = CallActivity.class;
    String activityAction = Activity.ACTION_MAIN;
    int notificationId = ID_CALL_IN_PROGRESS;
    var extras = new Bundle();
    String title = context.getString(R.string.app_name);
    Bitmap bitmap = AndroidUtil.getBitmap(R.drawable.icon_notification);
    messageText = AndroidUtil.getString(R.string.notification_bullet,
        messageText,
        callEvent.getAccountName());

    Intent intent = new Intent(context, activity)
        .setAction(activityAction)
        .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
        .putExtras(extras);

    val builder = new NotificationCompat.Builder(context)
        .setContentIntent(PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT))
        .setContentText(messageText)
        .setContentTitle(title)
        .setLargeIcon(bitmap);

    val notification = builder.build();
    val manager = (NotificationManager) AndroidUtil.getSystemService(Context.NOTIFICATION_SERVICE);
    manager.notify(notificationId, notification);
}                                

                                    - (void)onNewEvent:(Softphone::EventHistory::Event::Pointer)event
{
    switch (incomingEvent->eventType)
    {
        case Softphone::EventHistory::EventType::Call:
        {
            Softphone::EventHistory::CallEvent::Pointer callEvent = event.asCall();

            UNMutableNotificationContent *notification = [[UNMutableNotificationContent alloc] init];
            notification.title = @"Groundwire";
            notification.body = [NSString stringWithFormat:NSLocalizedString(@"Incoming call from %@", @"notification"), ali::mac::str::to_nsstring(callEvent->getRemoteUser().getDisplayName())];
            notification.sound = [UNNotificationSound defaultSound];

            UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:[[NSUUID UUID] UUIDString] content:notification trigger:nil];
            UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
            [center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error)
            {
                if (!error)
                {
                    // Handle successful notification request
                }
            }];
        }
            break;

        default:
            break;
    }
}                                

									
									
									
								
Number Rewriting

									Powered by Acrobits • α sinch company
								

                                    // Rewriting
rewritingString = "<rewriting><rule><conditions><condition type=\"doesntStartWith\" param=\"+\"/><condition type=\"longerThan\" param=\"8\"/></conditions> <actions> <action type=\"prepend\" param=\"+420\"/> </actions> </rule> </rewriting>";
mRewritingXml = Xml.parse(rewritingString);
if (mRewritingXml != null) {
    Instance.Contacts.NumberRewriting.setRewriterRules(null, mRewritingXml);
}                                

                                    ali::string_literal rewritingRule{
    "<rewriting>\n"
    "    <rule>\n"
    "        <conditions>\n"
    "            <condition type=\"doesntStartWith\" param=\"+\"/>\n"
    "            <condition type=\"longerThan\" param=\"8\"/>\n"
    "        </conditions>\n"
    "        <actions>\n"
    "            <action type=\"prepend\" param=\"+420\"/>\n"
    "        </actions>\n"
    "    </rule>\n"
    "</rewriting>"
};

int errorIndex = 0;
bool success;

ali::xml::tree rewritingXml;
success = ali::xml::parse(rewritingXml, rewritingRule, &errorIndex);

if (success)
    Softphone::instance()->contacts()->numberRewriting()->setRewriterRules(rewritingXml);                                

									
									
									
								
Conference Calling

									Powered by Acrobits • α sinch company
								

                                    // JoinCall
// ******************************************************************
public static void join(String firstConferenceId, String secondConferenceId) {
    if (firstConferenceId == null || secondConferenceId == null)
        return;
    if (firstConferenceId.equals(secondConferenceId))
        return;

    val firstConferenceCalls = Instance.Calls.Conferences.getCalls(secondConferenceId);
    val secConferenceCalls = Instance.Calls.Conferences.getCalls(firstConferenceId);

    val newConferenceId = Instance.Calls.Conferences.generate("newConf");
    for (val event : firstConferenceCalls)
    Instance.Calls.Conferences.move(event, newConferenceId);
    for (val event : secConferenceCalls)
    Instance.Calls.Conferences.move(event, newConferenceId);

    Instance.Calls.Conferences.setActive(newConferenceId);
}

// Split Call
// ******************************************************************
public static void split(CallEvent callEvent) {
    Instance.Calls.Conferences.split(callEvent, false);
    Instance.Calls.setHeld(callEvent, true);
}

// Split Conference
// ******************************************************************
public static void split(String confId) {
    var confCalls = Instance.Calls.Conferences.getCalls(confId);
    for (int i = 0; i < confCalls.length; i++) {
        val callEvent = confCalls[i];
        Instance.Calls.Conferences.split(callEvent, false);
        Instance.Calls.setHeld(callEvent, true);
    }
}                                

                                    //*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
- (void)joinCall:(Softphone::EventHistory::CallEvent::Pointer)call toGroup:(const ali::string &)group
//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
{
    Softphone::instance()->calls()->conferences()->move(call, group);
}

//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
- (void)splitCall:(Softphone::EventHistory::CallEvent::Pointer)call
//*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
{
    ali::string groupId = Softphone::instance()->calls()->conferences()->get(call);
    Softphone::instance()->calls()->conferences()->split(call, true);
}

//-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
- (void)splitGroup:(ali::string const&)groupId
//-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
{
    ali::array_set<Softphone::EventHistory::CallEvent::Pointer> calls =
        Softphone::instance()->calls()->conferences()->getCalls(groupId);

    for (auto call : calls) {
        Softphone::instance()->calls()->conferences()->split(call, false);
    }
}                                

Cloud Softphone

Softphone SDK

Softphone Apps

White Label Softphone

Video Conferencing

Messaging

White Label Softphone

Video Conferencing

Messaging

Acrobits UCaaS & Branded VoIP Apps

Create best-in-class white-label softphone solutions today — not tomorrow.

Cloud Softphone

LinkUp

Softphone Apps

Softphone SDK

Cloud Softphone

LinkUp

Softphone Apps

Softphone SDK

Your vision, our expertise

Cloud Softphone & LinkUp UCaaS Apps

Instantly add video conferencing to your apps with LinkUp

All the softphone features you need to compete

iOS apps

Android apps

Windows native apps

MacOS native apps

Push notifications

Self service

300+ customizations per OS

100+ features

100% native apps

Try & buy

World class support

One click app store updates

Authenticated users

High user maximum

Receive world-class support

Global server infrastructure

Calendar integration

Custom meeting rooms

Call recordings

Keep your clients connected

Meeting history

Voice, video & chat

Screen sharing

PSTN call-in

iOS apps

Android apps

Windows native apps

MacOS native apps

Push notifications

Self service

300+ customizations per OS

100+ features

100% native apps

Try & buy

World class support

One click app store updates

Authenticated users

High user maximum

Receive world-class support

Global server infrastructure

Calendar integration

Custom meeting rooms

Call recordings

Keep your clients connected

Meeting history

Voice, video & chat

Screen sharing

PSTN call-in

Build a branded UCaaS softphone app in 45 minutes

Softphone apps for iOS and Android

Lifetime license means a one-time fee and no monthly payments.

Groundwire

Acrobits: VoIP SIP Softphone

Read our blog

Check more here

How ESIM Providers Can Leverage Voice with Acrobits Technology: A Strategic Approach to Customer Retention

Unlocking GPS in SIP Calls: 7 Use Cases for Telcos

Instantly add video conferencing
to your apps with LinkUp

Acrobits:
VoIP SIP Softphone