diff --git a/src/apps/abstractnextcloudapp.h b/src/apps/abstractnextcloudapp.h
index 4aeff82..a65ef22 100644
--- a/src/apps/abstractnextcloudapp.h
+++ b/src/apps/abstractnextcloudapp.h
@@ -51,10 +51,6 @@ public slots:
         return m_replies.removeOne(reply);
     }
 
-protected slots:
-    virtual void updateCapabilities(QJsonObject* capabilites) = 0;
-    virtual void updateReply(QNetworkReply* reply) = 0;
-
 signals:
     void installedChanged(bool);
     void capabilitiesChanged(QJsonObject* json);
diff --git a/src/apps/notes/notesapp.cpp b/src/apps/notes/notesapp.cpp
index 68f8bb0..48d0e5c 100644
--- a/src/apps/notes/notesapp.cpp
+++ b/src/apps/notes/notesapp.cpp
@@ -1,10 +1,26 @@
 #include "notesapp.h"
 
-NotesApp::NotesApp(QObject *parent, QString name, NextcloudApi* api)
-    : AbstractNextcloudApp(parent, name, api) {
+NotesApp::NotesApp(QObject *parent, NextcloudApi* api)
+    : AbstractNextcloudApp(parent, "notes", api) {
     m_notesProxy.setSourceModel(&m_notesModel);
 }
 
+// QML singleton
+AbstractNextcloudApp * NotesApp::instance = nullptr;
+
+void NotesApp::instantiate(QObject *parent, NextcloudApi *api) {
+    if (instance == nullptr) {
+        instance = new NotesApp(parent, api);
+    }
+}
+
+AbstractNextcloudApp & NotesApp::getInstance() {
+    return *instance;
+}
+
+QObject * NotesApp::provider(QQmlEngine *, QJSEngine *) {
+    return instance;
+}
 
 QVersionNumber NotesApp::serverVersion() const {
     return QVersionNumber::fromString(m_capabilities.value("version").toString());
diff --git a/src/apps/notes/notesapp.h b/src/apps/notes/notesapp.h
index 166c84b..3dd48b9 100644
--- a/src/apps/notes/notesapp.h
+++ b/src/apps/notes/notesapp.h
@@ -1,6 +1,8 @@
 #ifndef NOTESAPP_H
 #define NOTESAPP_H
 
+#include <QQmlEngine>
+#include <QJSEngine>
 #include <QAbstractListModel>
 #include <QSortFilterProxyModel>
 #include <QVersionNumber>
@@ -21,10 +23,15 @@ class NotesApp : public AbstractNextcloudApp {
     Q_PROPERTY(QList<QVersionNumber> apiVersions READ apiVersions NOTIFY capabilitiesChanged)
 
 public:
-    NotesApp(QObject *parent = nullptr, QString name = QString(), NextcloudApi* api = nullptr);
+    NotesApp(QObject *parent = nullptr, NextcloudApi* api = nullptr);
 
     virtual ~NotesApp() {}
 
+    // QML singleton
+    static void instantiate(QObject *parent = nullptr, NextcloudApi* api = nullptr);
+    static AbstractNextcloudApp & getInstance();
+    static QObject * provider(QQmlEngine *, QJSEngine *);
+
     const QSortFilterProxyModel* model() { return &m_notesProxy; }
 
     Q_INVOKABLE QVersionNumber serverVersion() const;
@@ -36,8 +43,8 @@ public slots:
     Q_INVOKABLE bool createNote(const QJsonObject& note, bool local = false);
     Q_INVOKABLE bool updateNote(const int id, const QJsonObject& note, bool local = false);
     Q_INVOKABLE bool deleteNote(const int id, bool local = false);
-    Q_INVOKABLE bool getSettings();
-    Q_INVOKABLE bool changeSettings(const QJsonObject& settings);
+    //Q_INVOKABLE bool getSettings();
+    //Q_INVOKABLE bool changeSettings(const QJsonObject& settings);
 
 protected slots:
     virtual void updateReply(QNetworkReply* reply);
@@ -46,6 +53,9 @@ signals:
     void capabilitiesChanged(QJsonObject* json);
 
 private:
+    // QML singleton
+    static AbstractNextcloudApp * instance;
+
     NotesModel m_notesModel;
     NotesProxyModel m_notesProxy;
 
diff --git a/src/apps/notes/notesmodel.cpp b/src/apps/notes/notesmodel.cpp
index 70b97b2..60cab84 100644
--- a/src/apps/notes/notesmodel.cpp
+++ b/src/apps/notes/notesmodel.cpp
@@ -75,7 +75,6 @@ const QHash<int, QByteArray> NotesModel::m_roleNames = QHash<int, QByteArray> (
 const QString NotesModel::m_fileSuffix = "json";
 
 NotesModel::NotesModel(QObject *parent) : QAbstractListModel(parent) {
-    mp_notesApi = nullptr;
     //m_fileDir.setCurrent(directory);
     m_fileDir.setPath("");
     m_fileDir.setFilter(QDir::Files | QDir::NoDotAndDotDot);
@@ -90,25 +89,6 @@ NotesModel::~NotesModel() {
         m_files.take(i.key()).close();
         i.toFront();
     }*/
-    setNotesApi(nullptr);
-}
-
-void NotesModel::setNotesApi(NotesApi *notesApi) {
-    if (mp_notesApi) {
-        // disconnect stuff
-        disconnect(mp_notesApi, SIGNAL(accountChanged(QString)), this, SIGNAL(accountChanged(QString)));
-        disconnect(mp_notesApi, SIGNAL(noteCreated(int,QJsonObject)), this, SLOT(insert(int,QJsonObject)));
-        disconnect(mp_notesApi, SIGNAL(noteUpdated(int,QJsonObject)), this, SLOT(update(int,QJsonObject)));
-        disconnect(mp_notesApi, SIGNAL(noteDeleted(int)), this, SLOT(remove(int)));
-    }
-    mp_notesApi = notesApi;
-    if (mp_notesApi) {
-        // connect stuff
-        connect(mp_notesApi, SIGNAL(accountChanged(QString)), this, SIGNAL(accountChanged(QString)));
-        connect(mp_notesApi, SIGNAL(noteCreated(int,QJsonObject)), this, SLOT(insert(int,QJsonObject)));
-        connect(mp_notesApi, SIGNAL(noteUpdated(int,QJsonObject)), this, SLOT(update(int,QJsonObject)));
-        connect(mp_notesApi, SIGNAL(noteDeleted(int)), this, SLOT(remove(int)));
-    }
 }
 
 QString NotesModel::account() const {
diff --git a/src/apps/notes/notesmodel.h b/src/apps/notes/notesmodel.h
index c2c3a5a..46333ef 100644
--- a/src/apps/notes/notesmodel.h
+++ b/src/apps/notes/notesmodel.h
@@ -9,7 +9,6 @@
 #include <QJsonArray>
 #include <QDateTime>
 #include "note.h"
-//#include "notesapi.h"
 
 class NotesProxyModel : public QSortFilterProxyModel {
     Q_OBJECT
@@ -81,8 +80,6 @@ public:
     virtual QMap<int, QVariant> itemData(const QModelIndex &index) const;
     virtual bool setItemData(const QModelIndex &index, const QMap<int, QVariant> &roles);
 
-    void setNotesApi(NotesApi* notesApi);
-
     int newNotePosition(const int id) const;
     Q_INVOKABLE const QVariantMap note(const int id) const;
     Q_INVOKABLE bool setNote(const QVariantMap& note, int id = -1);
@@ -105,8 +102,6 @@ private:
 
     QDir m_fileDir;
     const static QString m_fileSuffix;
-
-    //NotesApi* mp_notesApi;
 };
 
 #endif // NOTESMODEL_H
diff --git a/src/harbour-nextcloudnotes.cpp b/src/harbour-nextcloudnotes.cpp
index 5cfce99..7ad5eca 100644
--- a/src/harbour-nextcloudnotes.cpp
+++ b/src/harbour-nextcloudnotes.cpp
@@ -4,7 +4,8 @@
 #include <QObject>
 #include "accounthash.h"
 #include "nextcloudapi.h"
-#include "apps/notes/notesmodel.h"
+#include "apps/abstractnextcloudapp.h"
+#include "apps/notes/notesapp.h"
 
 int main(int argc, char *argv[])
 {
@@ -17,9 +18,13 @@ int main(int argc, char *argv[])
 
     qDebug() << app->applicationDisplayName() << app->applicationVersion();
 
-    NotesProxyModel* notesProxyModel = new NotesProxyModel;
     AccountHash* accountHash = new AccountHash;
-    qmlRegisterType<NextcloudApi>("NextcloudApi", 1, 0, "Nextcloud");
+    NextcloudApi::instantiate(app);
+    qmlRegisterSingletonType<NextcloudApi>("harbour.nextcloudnotes.nextcloudapi", 1, 0, "Nextcloud", NextcloudApi::provider);
+    NotesApp::instantiate(&NextcloudApi::getInstance(), &NextcloudApi::getInstance());
+    qmlRegisterSingletonType<NotesApp>("harbour.nextcloudnotes.nextcloudapi", 1, 0, "Notes", NotesApp::provider);
+    //qmlRegisterType<NextcloudApi>("NextcloudApi", 1, 0, "Nextcloud");
+    //qmlRegisterType<NotesApp>("NextcloudApi", 1, 0, "Notes");
 
     QQuickView* view = SailfishApp::createView();
 #ifdef QT_DEBUG
@@ -27,7 +32,6 @@ int main(int argc, char *argv[])
 #else
     view->rootContext()->setContextProperty("debug", QVariant(false));
 #endif
-    view->rootContext()->setContextProperty("notesModel", notesProxyModel);
     view->rootContext()->setContextProperty("accountHash", accountHash);
 
     view->setSource(SailfishApp::pathTo("qml/harbour-nextcloudnotes.qml"));
diff --git a/src/nextcloudapi.cpp b/src/nextcloudapi.cpp
index 5f3b6dc..0d74775 100644
--- a/src/nextcloudapi.cpp
+++ b/src/nextcloudapi.cpp
@@ -44,6 +44,23 @@ NextcloudApi::~NextcloudApi() {
     }
 }
 
+// QML singleton
+NextcloudApi * NextcloudApi::instance = nullptr;
+
+void NextcloudApi::instantiate(QObject *parent) {
+    if (instance == nullptr) {
+        instance = new NextcloudApi(parent);
+    }
+}
+
+NextcloudApi & NextcloudApi::getInstance() {
+    return *instance;
+}
+
+QObject * NextcloudApi::provider(QQmlEngine *, QJSEngine *) {
+    return instance;
+}
+
 void NextcloudApi::setVerifySsl(bool verify) {
     if (verify != (m_request.sslConfiguration().peerVerifyMode() == QSslSocket::VerifyPeer) ||
         verify != (m_authenticatedRequest.sslConfiguration().peerVerifyMode() == QSslSocket::VerifyPeer)) {
@@ -135,9 +152,9 @@ void NextcloudApi::setPassword(QString password) {
     }
 }
 
-bool NextcloudApi::notesAppInstalled() const {
-    QJsonObject notes = m_capabilities.value("notes").toObject();
-    return !notes.isEmpty();
+bool NextcloudApi::appInstalled(const QString& name) const {
+    QJsonObject app = m_capabilities.value(name).toObject();
+    return !app.isEmpty();
 }
 
 QStringList NextcloudApi::notesAppApiVersions() const {
diff --git a/src/nextcloudapi.h b/src/nextcloudapi.h
index 82bed9e..9620bb5 100644
--- a/src/nextcloudapi.h
+++ b/src/nextcloudapi.h
@@ -2,6 +2,8 @@
 #define NEXTCLOUDAPI_H
 
 #include <QObject>
+#include <QQmlEngine>
+#include <QJSEngine>
 #include <QJsonDocument>
 #include <QJsonObject>
 #include <QJsonArray>
@@ -82,14 +84,17 @@ class NextcloudApi : public QObject
 
     // Nextcloud capabilities
     Q_PROPERTY(ApiCallStatus capabilitiesStatus READ capabilitiesStatus NOTIFY capabilitiesStatusChanged)
-    Q_PROPERTY(bool notesAppInstalled READ notesAppInstalled NOTIFY capabilitiesChanged)
-    Q_PROPERTY(QStringList notesAppApiVersions READ notesAppApiVersions NOTIFY capabilitiesChanged)
     // TODO other property for server capabilities
 
 public:
     explicit NextcloudApi(QObject *parent = nullptr);
     virtual ~NextcloudApi();
 
+    // QML singleton
+    static void instantiate(QObject *parent = nullptr);
+    static NextcloudApi & getInstance();
+    static QObject * provider(QQmlEngine *, QJSEngine *);
+
     // API reply format
     enum ReplyFormat {
         ReplyJSON,                  // The reply should be in JSON format
@@ -205,6 +210,9 @@ public slots:
     Q_INVOKABLE bool getUserList();
     Q_INVOKABLE bool getCapabilities();
 
+    // Capabilities
+    Q_INVOKABLE bool appInstalled(const QString& name) const;
+
 signals:
     // Generic API properties
     void verifySslChanged(bool verify);
@@ -248,6 +256,9 @@ private slots:
     void replyFinished(QNetworkReply* reply);
 
 private:
+    // QML singleton
+    static NextcloudApi * instance;
+
     QUrl m_url;
     QNetworkAccessManager m_manager;
     QVector<QNetworkReply*> m_replies;