diff --git a/autotests/alternativesmodeltest.h b/autotests/alternativesmodeltest.h
--- a/autotests/alternativesmodeltest.h
+++ b/autotests/alternativesmodeltest.h
@@ -26,6 +26,7 @@
     private Q_SLOTS:
         void runJobTest();
         void bigBufferTest();
+        void platformFilteringTest();
 };
 
 #endif
diff --git a/autotests/alternativesmodeltest.cpp b/autotests/alternativesmodeltest.cpp
--- a/autotests/alternativesmodeltest.cpp
+++ b/autotests/alternativesmodeltest.cpp
@@ -50,7 +50,8 @@
     QFile::remove(tempfile);
     QJsonObject input = QJsonObject {
         {QStringLiteral("urls"), QJsonArray {QStringLiteral("http://kde.org")} },
-        {QStringLiteral("mimeType"), QStringLiteral("dummy/thing") }
+        {QStringLiteral("mimeType"), QStringLiteral("dummy/thing") },
+        {QStringLiteral("platform"), QStringLiteral("mobile")}
     };
     model.setInputData(input);
 
@@ -87,7 +88,8 @@
     const QJsonObject input = {
         {QStringLiteral("urls"), QJsonArray {uri} },
         {QStringLiteral("mimeType"), QStringLiteral("dummy/thing") },
-        {QStringLiteral("destinationPath"), QUrl::fromLocalFile(tempfile).url()}
+        {QStringLiteral("destinationPath"), QUrl::fromLocalFile(tempfile).url()},
+        {QStringLiteral("platform"), QStringLiteral("mobile")}
     };
     model.setInputData(input);
     model.setPluginType(QStringLiteral("Export"));
@@ -111,3 +113,55 @@
     QCOMPARE(fi.size(), payload.size());
     QVERIFY(QFile::remove(tempfile));
 }
+
+void AlternativesModelTest::platformFilteringTest()
+{
+    const auto listPlugins = [](const QString &platform = QString()) {
+        QStringList plugins;
+        Purpose::AlternativesModel model;
+        QJsonObject input = QJsonObject {
+            {QStringLiteral("urls"), QJsonArray {QStringLiteral("http://kde.org")} },
+            {QStringLiteral("mimeType"), QStringLiteral("dummy/thing") }
+        };
+        if (!platform.isEmpty()) {
+            input.insert(QStringLiteral("platform"), platform);
+        }
+        model.setInputData(input);
+        model.setPluginType(QStringLiteral("Export"));
+
+        for (int i = 0; i < model.rowCount(); ++i) {
+            plugins << model.index(i).data(Purpose::AlternativesModel::PluginIdRole).toString();
+        }
+        return plugins;
+    };
+
+    const auto possiblePlatforms = QStringList{QStringLiteral("desktop"), QStringLiteral("mobile")};
+    const auto defaultPlatform = Purpose::AlternativesModel::getDefaultPlatform();
+    QVERIFY(possiblePlatforms.contains(defaultPlatform));
+
+    Purpose::AlternativesModel::setDefaultPlatform(QStringLiteral("desktop"));
+    auto plugins = listPlugins();
+    QVERIFY(!plugins.contains(QStringLiteral("saveasplugin")));
+    QVERIFY(plugins.contains(QStringLiteral("kdeconnectplugin")));
+
+    plugins = listPlugins(QStringLiteral("desktop"));
+    QVERIFY(!plugins.contains(QStringLiteral("saveasplugin")));
+    QVERIFY(plugins.contains(QStringLiteral("kdeconnectplugin")));
+
+    plugins = listPlugins(QStringLiteral("mobile"));
+    QVERIFY(plugins.contains(QStringLiteral("saveasplugin")));
+    QVERIFY(plugins.contains(QStringLiteral("kdeconnectplugin")));
+
+    Purpose::AlternativesModel::setDefaultPlatform(QStringLiteral("mobile"));
+    plugins = listPlugins();
+    QVERIFY(plugins.contains(QStringLiteral("saveasplugin")));
+    QVERIFY(plugins.contains(QStringLiteral("kdeconnectplugin")));
+
+    plugins = listPlugins(QStringLiteral("mobile"));
+    QVERIFY(plugins.contains(QStringLiteral("saveasplugin")));
+    QVERIFY(plugins.contains(QStringLiteral("kdeconnectplugin")));
+
+    plugins = listPlugins(QStringLiteral("desktop"));
+    QVERIFY(!plugins.contains(QStringLiteral("saveasplugin")));
+    QVERIFY(plugins.contains(QStringLiteral("kdeconnectplugin")));
+}
diff --git a/src/alternativesmodel.h b/src/alternativesmodel.h
--- a/src/alternativesmodel.h
+++ b/src/alternativesmodel.h
@@ -45,6 +45,9 @@
         IconNameRole
     };
 
+    static QString getDefaultPlatform();
+    static void setDefaultPlatform(const QString &platform);
+
     AlternativesModel(QObject* parent = Q_NULLPTR);
     virtual ~AlternativesModel();
 
diff --git a/src/alternativesmodel.cpp b/src/alternativesmodel.cpp
--- a/src/alternativesmodel.cpp
+++ b/src/alternativesmodel.cpp
@@ -36,6 +36,13 @@
 
 using namespace Purpose;
 
+static QString s_defaultPlatform =
+#if defined(Q_OS_ANDROID) || defined(Q_OS_IOS) || (defined(WINAPI_FAMILY_PHONE_APP) && WINAPI_FAMILY==WINAPI_FAMILY_PHONE_APP)
+    QStringLiteral("mobile");
+#else
+    QStringLiteral("desktop");
+#endif
+
 typedef bool (*matchFunction)(const QString& constraint, const QJsonValue& value);
 
 static bool defaultMatch(const QString& constraint, const QJsonValue& value)
@@ -85,6 +92,11 @@
             return false;
         }
 
+        QJsonObject inputData = m_inputData;
+        if (!inputData.contains(QStringLiteral("platform"))) {
+            inputData.insert(QStringLiteral("platform"), s_defaultPlatform);
+        }
+
         const QJsonArray constraints = obj.value(QStringLiteral("X-Purpose-Constraints")).toArray();
         const QRegularExpression constraintRx(QStringLiteral("(\\w+):(.*)"));
         for(const QJsonValue& constraint: constraints) {
@@ -96,7 +108,7 @@
             }
             QString propertyName = match.captured(1);
             QString constrainedValue = match.captured(2);
-            bool acceptable = s_matchFunctions.value(propertyName, defaultMatch)(constrainedValue, m_inputData.value(propertyName));
+            bool acceptable = s_matchFunctions.value(propertyName, defaultMatch)(constrainedValue, inputData.value(propertyName));
             if (!acceptable) {
 //                 qDebug() << "not accepted" << meta.name() << propertyName << constrainedValue << m_inputData[propertyName];
                 return false;
@@ -106,6 +118,16 @@
     }
 };
 
+QString AlternativesModel::getDefaultPlatform()
+{
+    return s_defaultPlatform;
+}
+
+void AlternativesModel::setDefaultPlatform(const QString &platform)
+{
+    s_defaultPlatform = platform;
+}
+
 AlternativesModel::AlternativesModel(QObject* parent)
     : QAbstractListModel(parent)
     , d_ptr(new AlternativesModelPrivate)
diff --git a/src/plugins/saveas/saveasplugin.json b/src/plugins/saveas/saveasplugin.json
--- a/src/plugins/saveas/saveasplugin.json
+++ b/src/plugins/saveas/saveasplugin.json
@@ -60,7 +60,9 @@
     "X-Purpose-Configuration": [
         "destinationPath"
     ],
-    "X-Purpose-Constraints": [],
+    "X-Purpose-Constraints": [
+        "platform:mobile"
+    ],
     "X-Purpose-PluginTypes": [
         "Export"
     ]