diff --git a/src/coinswidget.cpp b/src/coinswidget.cpp
index 507da8b..78d80a4 100644
--- a/src/coinswidget.cpp
+++ b/src/coinswidget.cpp
@@ -11,14 +11,14 @@
 #include <QClipboard>
 #include <QMessageBox>
 
-CoinsWidget::CoinsWidget(QWidget *parent)
+CoinsWidget::CoinsWidget(AppContext *ctx, QWidget *parent)
         : QWidget(parent)
         , ui(new Ui::CoinsWidget)
+        , m_ctx(ctx)
         , m_headerMenu(new QMenu(this))
         , m_copyMenu(new QMenu("Copy",this))
 {
     ui->setupUi(this);
-    m_ctx = MainWindow::getContext();
 
     // header context menu
     ui->coins->header()->setContextMenuPolicy(Qt::CustomContextMenu);
diff --git a/src/coinswidget.h b/src/coinswidget.h
index 0550c5d..38c1777 100644
--- a/src/coinswidget.h
+++ b/src/coinswidget.h
@@ -22,7 +22,7 @@ class CoinsWidget : public QWidget
 Q_OBJECT
 
 public:
-    explicit CoinsWidget(QWidget *parent = nullptr);
+    explicit CoinsWidget(AppContext *ctx, QWidget *parent = nullptr);
     void setModel(CoinsModel * model, Coins * coins);
     ~CoinsWidget() override;
 
@@ -54,6 +54,7 @@ private:
     };
 
     Ui::CoinsWidget *ui;
+    AppContext *m_ctx;
 
     QMenu *m_contextMenu;
     QMenu *m_headerMenu;
@@ -68,7 +69,6 @@ private:
     Coins *m_coins;
     CoinsModel * m_model;
     CoinsProxyModel * m_proxyModel;
-    AppContext *m_ctx;
 
     void showContextMenu(const QPoint & point);
     void copy(copyField field);
diff --git a/src/contactswidget.cpp b/src/contactswidget.cpp
index a7a7bc3..e7d9c01 100644
--- a/src/contactswidget.cpp
+++ b/src/contactswidget.cpp
@@ -11,12 +11,11 @@
 
 #include <QMessageBox>
 
-ContactsWidget::ContactsWidget(QWidget *parent) :
-    QWidget(parent),
-    ui(new Ui::ContactsWidget)
+ContactsWidget::ContactsWidget(QWidget *parent)
+    : QWidget(parent)
+    , ui(new Ui::ContactsWidget)
 {
     ui->setupUi(this);
-    m_ctx = MainWindow::getContext();
 
     // header context menu
     ui->contacts->header()->setContextMenuPolicy(Qt::CustomContextMenu);
@@ -69,9 +68,10 @@ void ContactsWidget::payTo() {
     emit fillAddress(address);
 }
 
-void ContactsWidget::setModel(AddressBookModel *model)
+void ContactsWidget::setModel(AddressBookModel *model, Wallet *wallet)
 {
     m_model = model;
+    m_wallet = wallet;
     m_proxyModel = new AddressBookProxyModel;
     m_proxyModel->setSourceModel(m_model);
     ui->contacts->setModel(m_proxyModel);
@@ -104,24 +104,31 @@ void ContactsWidget::showHeaderMenu(const QPoint& position)
 
 void ContactsWidget::newContact(QString address, QString name)
 {
-    auto * dialog = new ContactsDialog(this, address, name);
-    int ret = dialog->exec();
-    if (!ret) return;
+    if (!m_wallet) {
+        QMessageBox::warning(this, "Error", "No wallet opened.");
+        return;
+    }
 
-    address = dialog->getAddress();
-    name = dialog->getName();
+    ContactsDialog dialog{this, address, name};
+    int ret = dialog.exec();
+    if (ret != QDialog::Accepted) {
+        return;
+    }
 
-    bool addressValid = WalletManager::addressValid(address, m_ctx->currentWallet->nettype());
+    address = dialog.getAddress();
+    name = dialog.getName();
+
+    bool addressValid = WalletManager::addressValid(address, m_wallet->nettype());
     if (!addressValid) {
         QMessageBox::warning(this, "Invalid address", "Invalid address");
         return;
     }
 
-    int num_addresses = m_ctx->currentWallet->addressBook()->count();
+    int num_addresses = m_wallet->addressBook()->count();
     QString address_entry;
     QString name_entry;
     for (int i=0; i<num_addresses; i++) {
-        m_ctx->currentWallet->addressBook()->getRow(i, [&address_entry, &name_entry](const AddressBookInfo &entry){
+        m_wallet->addressBook()->getRow(i, [&address_entry, &name_entry](const AddressBookInfo &entry){
             address_entry = entry.address();
             name_entry = entry.description();
         });
@@ -138,7 +145,7 @@ void ContactsWidget::newContact(QString address, QString name)
         }
     }
 
-    m_ctx->currentWallet->addressBook()->addRow(address, "", name);
+    m_wallet->addressBook()->addRow(address, "", name);
 }
 
 void ContactsWidget::deleteContact()
diff --git a/src/contactswidget.h b/src/contactswidget.h
index 4035773..cf9a3a5 100644
--- a/src/contactswidget.h
+++ b/src/contactswidget.h
@@ -21,7 +21,7 @@ class ContactsWidget : public QWidget
 
 public:
     explicit ContactsWidget(QWidget *parent = nullptr);
-    void setModel(AddressBookModel * model);
+    void setModel(AddressBookModel *model, Wallet *wallet);
     ~ContactsWidget() override;
 
 public slots:
@@ -42,7 +42,6 @@ private slots:
 
 private:
     Ui::ContactsWidget *ui;
-    AppContext *m_ctx;
 
     QAction *m_showFullAddressesAction;
     QMenu *m_rowMenu;
@@ -50,6 +49,7 @@ private:
     QMenu *m_headerMenu;
     AddressBookModel * m_model;
     AddressBookProxyModel * m_proxyModel;
+    Wallet *m_wallet;
 };
 
 #endif // CONTACTSWIDGET_H
diff --git a/src/libwalletqt/Subaddress.cpp b/src/libwalletqt/Subaddress.cpp
index 308eb4a..dc68357 100644
--- a/src/libwalletqt/Subaddress.cpp
+++ b/src/libwalletqt/Subaddress.cpp
@@ -5,7 +5,9 @@
 #include <QDebug>
 
 Subaddress::Subaddress(Monero::Subaddress *subaddressImpl, QObject *parent)
-  : QObject(parent), m_subaddressImpl(subaddressImpl), m_unusedLookahead(0)
+    : QObject(parent)
+    , m_subaddressImpl(subaddressImpl)
+    , m_unusedLookahead(0)
 {
     getAll();
 }
diff --git a/src/libwalletqt/Wallet.h b/src/libwalletqt/Wallet.h
index a3b9612..84311d9 100644
--- a/src/libwalletqt/Wallet.h
+++ b/src/libwalletqt/Wallet.h
@@ -423,7 +423,7 @@ public:
 
     // Passphrase entry for hardware wallets
     void onPassphraseEntered(const QString &passphrase, bool enter_on_device, bool entry_abort=false);
-    virtual void onWalletPassphraseNeeded(bool on_device) override;
+    void onWalletPassphraseNeeded(bool on_device) override;
 
     quint64 getBytesReceived() const;
     quint64 getBytesSent() const;
@@ -466,7 +466,7 @@ signals:
 
 private:
     Wallet(QObject * parent = nullptr);
-    Wallet(Monero::Wallet *w, QObject * parent = 0);
+    Wallet(Monero::Wallet *w, QObject * parent = nullptr);
     ~Wallet();
 
     //! initializes wallet
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 7b0b72d..7c1e0e4 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -32,17 +32,14 @@
 #include "utils/WebsocketNotifier.h"
 #include "utils/Updater.h"
 
-MainWindow * MainWindow::pMainWindow = nullptr;
-
 MainWindow::MainWindow(AppContext *ctx, QWidget *parent)
     : QMainWindow(parent)
     , ui(new Ui::MainWindow)
     , m_ctx(ctx)
 {
-    pMainWindow = this;
     ui->setupUi(this);
 
-    m_windowSettings = new Settings(this);
+    m_windowSettings = new Settings(m_ctx, this);
     m_windowCalc = new CalcWindow(this);
     m_splashDialog = new SplashDialog(this);
 
@@ -71,7 +68,7 @@ MainWindow::MainWindow(AppContext *ctx, QWidget *parent)
         connect(m_windowSettings, &Settings::preferredFiatCurrencyChanged, tickerWidget, &TickerWidget::init);
     connect(m_windowSettings, &Settings::preferredFiatCurrencyChanged, m_balanceWidget, &TickerWidget::init);
     connect(m_windowSettings, &Settings::preferredFiatCurrencyChanged, m_ctx, &AppContext::onPreferredFiatCurrencyChanged);
-    connect(m_windowSettings, &Settings::preferredFiatCurrencyChanged, ui->sendWidget, QOverload<>::of(&SendWidget::onPreferredFiatCurrencyChanged));
+    connect(m_windowSettings, &Settings::preferredFiatCurrencyChanged, m_sendWidget, QOverload<>::of(&SendWidget::onPreferredFiatCurrencyChanged));
     connect(m_windowSettings, &Settings::amountPrecisionChanged, m_ctx, &AppContext::onAmountPrecisionChanged);
     connect(m_windowSettings, &Settings::skinChanged, this, &MainWindow::skinChanged);
 
@@ -192,13 +189,20 @@ void MainWindow::initWidgets() {
     connect(ui->historyWidget, &HistoryWidget::viewOnBlockExplorer, this, &MainWindow::onViewOnBlockExplorer);
     connect(ui->historyWidget, &HistoryWidget::resendTransaction, this, &MainWindow::onResendTransaction);
 
+    // [Send]
+    m_sendWidget = new SendWidget(m_ctx, this);
+    ui->sendWidgetLayout->addWidget(m_sendWidget);
+
     // [Receive]
     connect(ui->receiveWidget, &ReceiveWidget::showTransactions, [this](const QString &text) {
         ui->historyWidget->setSearchText(text);
         ui->tabWidget->setCurrentIndex(Tabs::HISTORY);
     });
-    connect(ui->contactWidget, &ContactsWidget::fillAddress, ui->sendWidget, &SendWidget::fillAddress);
+    connect(ui->contactWidget, &ContactsWidget::fillAddress, m_sendWidget, &SendWidget::fillAddress);
 
+    // [Coins]
+    m_coinsWidget = new CoinsWidget(m_ctx, this);
+    ui->coinsWidgetLayout->addWidget(m_coinsWidget);
 
 #ifdef HAS_LOCALMONERO
     m_localMoneroWidget = new LocalMoneroWidget(this, m_ctx);
@@ -618,11 +622,11 @@ void MainWindow::onWalletOpened() {
     ui->historyWidget->setModel(m_ctx->currentWallet->historyModel(), m_ctx->currentWallet);
 
     // contacts widget
-    ui->contactWidget->setModel(m_ctx->currentWallet->addressBookModel());
+    ui->contactWidget->setModel(m_ctx->currentWallet->addressBookModel(), m_ctx->currentWallet);
 
     // coins page
     m_ctx->currentWallet->coins()->refresh(m_ctx->currentWallet->currentSubaddressAccount());
-    ui->coinsWidget->setModel(m_ctx->currentWallet->coinsModel(), m_ctx->currentWallet->coins());
+    m_coinsWidget->setModel(m_ctx->currentWallet->coinsModel(), m_ctx->currentWallet->coins());
 
     this->touchbarShowWallet();
     this->updatePasswordIcon();
@@ -784,7 +788,7 @@ void MainWindow::onTransactionCommitted(bool status, PendingTransaction *tx, con
     if (status) { // success
         QString body = QString("Successfully sent %1 transaction(s).").arg(txid.count());
         QMessageBox::information(this, "Transactions sent", body);
-        ui->sendWidget->clearFields();
+        m_sendWidget->clearFields();
     } else {
         auto err = tx->errorString();
         QString body = QString("Error committing transaction: %1").arg(err);
@@ -994,7 +998,7 @@ void MainWindow::donateButtonClicked() {
     if (donation <= 0)
         donation = 0.1337;
 
-    ui->sendWidget->fill(globals::donationAddress, "Donation to the Feather development team", donation);
+    m_sendWidget->fill(globals::donationAddress, "Donation to the Feather development team", donation);
     ui->tabWidget->setCurrentIndex(Tabs::SEND);
 }
 
@@ -1014,7 +1018,7 @@ void MainWindow::showCalcWindow() {
 
 void MainWindow::payToMany() {
     ui->tabWidget->setCurrentIndex(Tabs::SEND);
-    ui->sendWidget->payToMany();
+    m_sendWidget->payToMany();
     QMessageBox::information(this, "Pay to many", "Enter a list of outputs in the 'Pay to' field.\n"
                                                   "One output per line.\n"
                                                   "Format: address, amount\n"
@@ -1022,7 +1026,7 @@ void MainWindow::payToMany() {
 }
 
 void MainWindow::showSendScreen(const CCSEntry &entry) {
-    ui->sendWidget->fill(entry);
+    m_sendWidget->fill(entry);
     ui->tabWidget->setCurrentIndex(Tabs::SEND);
 }
 
@@ -1064,14 +1068,6 @@ void MainWindow::importContacts() {
     QMessageBox::information(this, "Contacts imported", QString("Total contacts imported: %1").arg(inserts));
 }
 
-MainWindow *MainWindow::getInstance() {
-    return pMainWindow;
-}
-
-AppContext *MainWindow::getContext(){
-    return pMainWindow->m_ctx;
-}
-
 QString MainWindow::loadStylesheet(const QString &resource) {
     QFile f(resource);
     if (!f.exists()) {
@@ -1481,7 +1477,7 @@ void MainWindow::onWalletAboutToClose() {
     ui->historyWidget->resetModel();
     ui->contactWidget->resetModel();
     ui->receiveWidget->resetModel();
-    ui->coinsWidget->resetModel();
+    m_coinsWidget->resetModel();
 }
 
 void MainWindow::onExportHistoryCSV(bool checked) {
diff --git a/src/mainwindow.h b/src/mainwindow.h
index 807a403..a32e2ad 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -36,6 +36,9 @@
 #include "widgets/tickerwidget.h"
 #include "wizard/WalletWizard.h"
 
+#include "sendwidget.h"
+#include "coinswidget.h"
+
 #ifdef HAS_LOCALMONERO
 #include "widgets/LocalMoneroWidget.h"
 #endif
@@ -68,8 +71,6 @@ Q_OBJECT
 
 public:
     explicit MainWindow(AppContext *ctx, QWidget *parent = nullptr);
-    static MainWindow *getInstance();
-    static AppContext *getContext();
     ~MainWindow() override;
 
     enum Tabs {
@@ -181,7 +182,6 @@ private:
     void startupWarning();
     bool autoOpenWallet();
 
-    static MainWindow * pMainWindow;
     void closeEvent(QCloseEvent *event) override;
     void cleanupBeforeClose();
     QString loadStylesheet(const QString &resource);
@@ -216,6 +216,8 @@ private:
     XMRigWidget *m_xmrig = nullptr;
     SplashDialog *m_splashDialog = nullptr;
 
+    SendWidget *m_sendWidget = nullptr;
+    CoinsWidget *m_coinsWidget = nullptr;
 #ifdef HAS_LOCALMONERO
     LocalMoneroWidget *m_localMoneroWidget = nullptr;
 #endif
diff --git a/src/mainwindow.ui b/src/mainwindow.ui
index be1b381..0b38545 100644
--- a/src/mainwindow.ui
+++ b/src/mainwindow.ui
@@ -188,29 +188,11 @@
          <number>11</number>
         </property>
         <item>
-         <widget class="SendWidget" name="sendWidget" native="true">
-          <property name="sizePolicy">
-           <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
-            <horstretch>0</horstretch>
-            <verstretch>0</verstretch>
-           </sizepolicy>
+         <layout class="QVBoxLayout" name="sendWidgetLayout">
+          <property name="spacing">
+           <number>0</number>
           </property>
-          <property name="minimumSize">
-           <size>
-            <width>0</width>
-            <height>100</height>
-           </size>
-          </property>
-          <property name="maximumSize">
-           <size>
-            <width>16777215</width>
-            <height>16777215</height>
-           </size>
-          </property>
-          <property name="styleSheet">
-           <string notr="true"/>
-          </property>
-         </widget>
+         </layout>
         </item>
         <item>
          <widget class="Line" name="line_3">
@@ -226,7 +208,14 @@
          </widget>
         </item>
         <item>
-         <widget class="ContactsWidget" name="contactWidget" native="true"/>
+         <widget class="ContactsWidget" name="contactWidget" native="true">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
+            <horstretch>0</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+         </widget>
         </item>
        </layout>
       </widget>
@@ -254,7 +243,7 @@
        </attribute>
        <layout class="QVBoxLayout" name="verticalLayout_2">
         <item>
-         <widget class="CoinsWidget" name="coinsWidget" native="true"/>
+         <layout class="QVBoxLayout" name="coinsWidgetLayout"/>
         </item>
        </layout>
       </widget>
@@ -735,12 +724,6 @@
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <customwidgets>
-  <customwidget>
-   <class>SendWidget</class>
-   <extends>QWidget</extends>
-   <header>sendwidget.h</header>
-   <container>1</container>
-  </customwidget>
   <customwidget>
    <class>ContactsWidget</class>
    <extends>QWidget</extends>
@@ -753,12 +736,6 @@
    <header>receivewidget.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>CoinsWidget</class>
-   <extends>QWidget</extends>
-   <header>coinswidget.h</header>
-   <container>1</container>
-  </customwidget>
   <customwidget>
    <class>HistoryWidget</class>
    <extends>QWidget</extends>
diff --git a/src/sendwidget.cpp b/src/sendwidget.cpp
index cc09f9c..7c6eb3b 100644
--- a/src/sendwidget.cpp
+++ b/src/sendwidget.cpp
@@ -8,12 +8,12 @@
 #include "globals.h"
 #include "utils/AppData.h"
 
-SendWidget::SendWidget(QWidget *parent)
+SendWidget::SendWidget(AppContext *ctx, QWidget *parent)
     : QWidget(parent)
     , ui(new Ui::SendWidget)
+    , m_ctx(ctx)
 {
     ui->setupUi(this);
-    m_ctx = MainWindow::getContext();
 
     QString amount_rx = R"(^\d{0,8}[\.,]\d{0,12}|(all)$)";
     QRegExp rx;
diff --git a/src/sendwidget.h b/src/sendwidget.h
index 056fb40..94b4163 100644
--- a/src/sendwidget.h
+++ b/src/sendwidget.h
@@ -17,7 +17,7 @@ class SendWidget : public QWidget
 Q_OBJECT
 
 public:
-    explicit SendWidget(QWidget *parent = nullptr);
+    explicit SendWidget(AppContext *ctx, QWidget *parent = nullptr);
     void fill(const CCSEntry &entry);
     void fill(const QString &address, const QString& description, double amount = 0);
     void fill(double amount);
diff --git a/src/sendwidget.ui b/src/sendwidget.ui
index 566459d..5de0934 100644
--- a/src/sendwidget.ui
+++ b/src/sendwidget.ui
@@ -10,6 +10,12 @@
     <height>231</height>
    </rect>
   </property>
+  <property name="sizePolicy">
+   <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
   <property name="windowTitle">
    <string>Form</string>
   </property>
diff --git a/src/settings.cpp b/src/settings.cpp
index bf73847..4be0ae2 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -7,12 +7,12 @@
 
 #include <QFileDialog>
 
-Settings::Settings(QWidget *parent) :
-        QDialog(parent),
-        ui(new Ui::Settings)
+Settings::Settings(AppContext *ctx, QWidget *parent)
+    : QDialog(parent)
+    , ui(new Ui::Settings)
+    , m_ctx(ctx)
 {
     ui->setupUi(this);
-    m_ctx = MainWindow::getContext();
 
     this->setWindowIcon(QIcon("://assets/images/appicons/64x64.png"));
 
diff --git a/src/settings.h b/src/settings.h
index 65b9078..e02c3b0 100644
--- a/src/settings.h
+++ b/src/settings.h
@@ -20,7 +20,7 @@ class Settings : public QDialog
 Q_OBJECT
 
 public:
-    explicit Settings(QWidget *parent = nullptr);
+    explicit Settings(AppContext *ctx, QWidget *parent = nullptr);
     ~Settings() override;
 
 signals:
@@ -49,8 +49,8 @@ private:
     void setupSkinCombobox();
     void setupLocalMoneroFrontendCombobox();
 
-    AppContext *m_ctx;
     Ui::Settings *ui;
+    AppContext *m_ctx;
 
     QStringList m_skins{"Native", "QDarkStyle", "Breeze/Dark", "Breeze/Light"};
     QStringList m_dateFormats{"yyyy-MM-dd", "MM-dd-yyyy", "dd-MM-yyyy"};