diff --git a/README.md b/README.md
index a78174d..2d646f0 100644
--- a/README.md
+++ b/README.md
@@ -107,4 +107,12 @@ qDebug() << zcs->txt["Qt"];
 
 Qt5
 
-On Linux, libavahi-client-dev and libavahi-common-dev
\ No newline at end of file
+On Linux, libavahi-client-dev and libavahi-common-dev
+
+### Apple App Store deployment
+
+Publishing GPL software in the App Store is a [violation of the GPL](https://news.ycombinator.com/item?id=3488833).  If you need to publish an app in the Apple App Store that uses QZeroConf, please contact me for a copy of QZeroConf with a BSD licence.
+
+### iOS device sleep
+
+When iOS puts the device to sleep, it breaks the DNS-SD browser and service publisher.  The only way around this is to call stopServicePublish() and stopBrowser() when the application state changes to Qt::ApplicationSuspended (sleep) and then call startPublish() and startBrowser() when the application state changes to Qt::ApplicationActive (wake).  See appStateChanged() in example.
diff --git a/avahiclient.cpp b/avahiclient.cpp
index 589be89..c755aaf 100644
--- a/avahiclient.cpp
+++ b/avahiclient.cpp
@@ -207,6 +207,12 @@ public:
 		avahi_service_browser_free(browser);
 		browser = NULL;
 
+        QMap<QString, QZeroConfService>::iterator i;
+		for (i = pub->services.begin(); i != pub->services.end(); i++) {
+            emit pub->serviceRemoved(i.value());
+
+		}
+
 		pub->services.clear();
 
 		QMap<QString, AvahiServiceResolver *>::iterator r;
@@ -227,6 +233,7 @@ public:
 };
 
 
+
 QZeroConf::QZeroConf(QObject *parent) : QObject(parent)
 {
 	pri = new QZeroConfPrivate(this);
@@ -266,6 +273,14 @@ void QZeroConf::stopServicePublish(void)
 	}
 }
 
+bool QZeroConf::publishExists(void)
+{
+	if (pri->group)
+		return true;
+	else
+		return false;
+}
+
 // http://www.zeroconf.org/rendezvous/txtrecords.html
 
 void QZeroConf::addServiceTxtRecord(QString nameOnly)
@@ -309,3 +324,11 @@ void QZeroConf::stopBrowser(void)
 {
 	pri->broswerCleanUp();
 }
+
+bool QZeroConf::browserExists(void)
+{
+	if (pri->browser)
+		return true;
+	else
+		return false;
+}
diff --git a/avahicore.cpp b/avahicore.cpp
index c9536cf..091514b 100644
--- a/avahicore.cpp
+++ b/avahicore.cpp
@@ -220,8 +220,10 @@ public:
 		browser = NULL;
 
 		QMap<QString, QZeroConfService *>::iterator i;
-		for (i = pub->services.begin(); i != pub->services.end(); i++)
+		for (i = pub->services.begin(); i != pub->services.end(); i++) {
+			emit pub->serviceRemoved(*i);
 			delete *i;
+		}
 		pub->services.clear();
 
 		QMap<QString, AvahiSServiceResolver *>::iterator r;
@@ -269,7 +271,7 @@ public:
 };
 
 
-QZeroConf::QZeroConf()
+QZeroConf::QZeroConf(QObject *parent) : QObject (parent)
 {
 	pri = new QZeroConfPrivate(this);
 }
@@ -309,6 +311,14 @@ void QZeroConf::stopServicePublish(void)
 	}
 }
 
+bool QZeroConf::publishExists(void)
+{
+	if (pri->group)
+		return true;
+	else
+		return false;
+}
+
 // http://www.zeroconf.org/rendezvous/txtrecords.html
 
 void QZeroConf::addServiceTxtRecord(QString nameOnly)
@@ -352,3 +362,11 @@ void QZeroConf::stopBrowser(void)
 {
 	pri->broswerCleanUp();
 }
+
+bool QZeroConf::browserExists(void)
+{
+	if (pri->browser)
+		return true;
+	else
+		return false;
+}
diff --git a/bonjour.cpp b/bonjour.cpp
index 9076eb3..041b974 100644
--- a/bonjour.cpp
+++ b/bonjour.cpp
@@ -245,6 +245,12 @@ void QZeroConfPrivate::cleanUp(DNSServiceRef toClean)
 			delete browserSocket;
 			browserSocket = NULL;
 		}
+
+        QMap<QString, QZeroConfService >::iterator i;
+		for (i = pub->services.begin(); i != pub->services.end(); i++) {
+			emit pub->serviceRemoved(*i);
+		}
+
 		pub->services.clear();
 	}
 	else if (toClean == dnssRef) {
@@ -311,6 +317,14 @@ void QZeroConf::stopServicePublish(void)
 	pri->cleanUp(pri->dnssRef);
 }
 
+bool QZeroConf::publishExists(void)
+{
+	if (pri->dnssRef)
+		return true;
+	else
+		return false;
+}
+
 void QZeroConf::addServiceTxtRecord(QString nameOnly)
 {
 	pri->txt.append((quint8) nameOnly.size());
@@ -367,3 +381,11 @@ void QZeroConf::stopBrowser(void)
 {
 	pri->cleanUp(pri->browser);
 }
+
+bool QZeroConf::browserExists(void)
+{
+	if (pri->browser)
+		return true;
+	else
+		return false;
+}
diff --git a/example/window.cpp b/example/window.cpp
index df73dde..cc10272 100644
--- a/example/window.cpp
+++ b/example/window.cpp
@@ -24,6 +24,7 @@
    Example app to demonstrate service publishing and service discovery
 ---------------------------------------------------------------------------------------------------
 **************************************************************************************************/
+#include <QGuiApplication>
 #include <QVBoxLayout>
 #include <QPushButton>
 #include <QTableWidgetItem>
@@ -52,11 +53,13 @@ mainWindow::mainWindow()
 	publishEnabled = 0;
 	buildGUI();
 
-    connect(&zeroConf, SIGNAL(serviceAdded(QZeroConfService )), this, SLOT(addService(QZeroConfService )));
-    connect(&zeroConf, SIGNAL(serviceRemoved(QZeroConfService )), this, SLOT(removeService(QZeroConfService )));
 
-    zeroConf.startBrowser("_qtzeroconf_test._tcp");
-	startPublish();
+    connect(&zeroConf, &QZeroConf::serviceAdded, this, &mainWindow::addService);
+    connect(&zeroConf, &QZeroConf::serviceRemoved, this, &mainWindow::removeService);
+	connect(qGuiApp, SIGNAL(applicationStateChanged(Qt::ApplicationState)), this, SLOT(appStateChanged(Qt::ApplicationState)));
+
+	publishEnabled = 1;
+
 }
 
 void mainWindow::buildGUI()
@@ -68,13 +71,13 @@ void mainWindow::buildGUI()
 	button->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 	layout->addWidget(button);
 	layout->setAlignment(button, Qt::AlignHCenter);
-	connect(button, SIGNAL(clicked()), this, SLOT(startPublish()));
+	connect(button, &QPushButton::clicked, this, &mainWindow::startPublishClicked);
 
 	button = new QPushButton(tr(" Disable Publish "));
 	button->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 	layout->addWidget(button);
 	layout->setAlignment(button, Qt::AlignHCenter);
-	connect(button, SIGNAL(clicked()), this, SLOT(stopPublish()));
+	connect(button, &QPushButton::clicked, this, &mainWindow::stopPublishClicked);
 
 	table.verticalHeader()->hide();
 	table.horizontalHeader()->hide();
@@ -102,21 +105,39 @@ QString mainWindow::buildName(void)
     return name;
 }
 
+void mainWindow::appStateChanged(Qt::ApplicationState state)
+{
+	if (state == Qt::ApplicationSuspended) {
+		zeroConf.stopServicePublish();
+		zeroConf.stopBrowser();
+	}
+	else if (state == Qt::ApplicationActive) {
+		if (publishEnabled && !zeroConf.publishExists())
+			startPublish();
+		if (!zeroConf.browserExists())
+			zeroConf.startBrowser("_qtzeroconf_test._tcp");
+	}
+}
+
 // ---------- Service Publish ----------
 
 void mainWindow::startPublish()
 {
-	if (publishEnabled)
-		return;
-	publishEnabled = 1;
-
 	zeroConf.clearServiceTxtRecords();
 	zeroConf.addServiceTxtRecord("Qt", "the best!");
 	zeroConf.addServiceTxtRecord("ZeroConf is nice too");
 	zeroConf.startServicePublish(buildName().toUtf8(), "_qtzeroconf_test._tcp", "local", 11437);
 }
 
-void mainWindow::stopPublish()
+void mainWindow::startPublishClicked()
+{
+	if (publishEnabled)
+		return;
+	publishEnabled = 1;
+	startPublish();
+}
+
+void mainWindow::stopPublishClicked()
 {
 	if (!publishEnabled)
 		return;
diff --git a/example/window.h b/example/window.h
index f99bfdf..d7f61d6 100644
--- a/example/window.h
+++ b/example/window.h
@@ -40,16 +40,20 @@ public:
 
 private:
 	void buildGUI();
+	void startPublish();
 	QString buildName(void);
 	QTableWidget table;
 	QZeroConf zeroConf;
 	bool publishEnabled;
 
 private slots:
-	void startPublish();
-	void stopPublish();
+
+	void appStateChanged(Qt::ApplicationState state);
+	void startPublishClicked();
+	void stopPublishClicked();
     void addService(QZeroConfService item);
     void removeService(QZeroConfService item);
+
 };
 
 #endif /* WINDOW_H_ */
diff --git a/qzeroconf.h b/qzeroconf.h
index 3ccb4c8..d64fa40 100644
--- a/qzeroconf.h
+++ b/qzeroconf.h
@@ -64,12 +64,14 @@ public:
 	~QZeroConf();
 	void startServicePublish(const char *name, const char *type, const char *domain, quint16 port);
 	void stopServicePublish(void);
+	bool publishExists(void);
 	inline void startBrowser(QString type)
 	{
 		startBrowser(type, QAbstractSocket::IPv4Protocol);
 	}
 	void startBrowser(QString type, QAbstractSocket::NetworkLayerProtocol protocol);
 	void stopBrowser(void);
+	bool browserExists(void);
 	void addServiceTxtRecord(QString nameOnly);
 	void addServiceTxtRecord(QString name, QString value);
 	void clearServiceTxtRecords();
diff --git a/qzeroconfservice.cpp b/qzeroconfservice.cpp
index 3a8b39e..c17dae7 100644
--- a/qzeroconfservice.cpp
+++ b/qzeroconfservice.cpp
@@ -141,7 +141,7 @@ bool QZeroConfService::isValid() const
 
 bool QZeroConfService::operator==(const QZeroConfService &rhs) const
 {
-    return this->name() == rhs.name() && this->ip() == rhs.ip() && this->ipv6() == rhs.ipv6();
+    return this->name() == rhs.name() && (this->ip() == rhs.ip() || this->ipv6() == rhs.ipv6());
 }