diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 6d178ee..e9734fd 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -3,7 +3,6 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:versionCode="128"
     android:versionName="4.2.1b">
-
     <!-- android:allowBackup="false" -->
     <uses-permission android:name="android.permission.BLUETOOTH" />
     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
@@ -22,10 +21,13 @@
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
-
-    <!-- AD_ID seems to be added automatically as part of google play services.  We don't use ads,
-    so explicitly remove it to keep Google Play store happy.  -->
-    <uses-permission android:name="com.google.android.gms.permission.AD_ID" tools:node="remove"/>
+    <!--
+ AD_ID seems to be added automatically as part of google play services.  We don't use ads,
+    so explicitly remove it to keep Google Play store happy.
+    -->
+    <uses-permission
+        android:name="com.google.android.gms.permission.AD_ID"
+        tools:node="remove" />
 
     <uses-feature
         android:name="android.hardware.telephony"
@@ -39,6 +41,9 @@
         android:label="@string/app_name"
         android:networkSecurityConfig="@xml/network_security_config"
         android:theme="@style/AppTheme">
+        <activity
+            android:name=".MainActivity2"
+            android:exported="false" />
         <activity
             android:name=".MlModelManager"
             android:exported="false"
@@ -61,7 +66,7 @@
             android:exported="true"
             android:icon="@drawable/star_of_life_48x48"
             android:label="@string/app_name" />
-        <activity
+ g       <activity
             android:name=".PrefActivity"
             android:label="OpenSeizureDetector Preferences" />
         <activity
diff --git a/app/src/main/java/uk/org/openseizuredetector/FragmentOsdAlg.java b/app/src/main/java/uk/org/openseizuredetector/FragmentOsdAlg.java
new file mode 100644
index 0000000..6bd7b85
--- /dev/null
+++ b/app/src/main/java/uk/org/openseizuredetector/FragmentOsdAlg.java
@@ -0,0 +1,25 @@
+package uk.org.openseizuredetector;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+public class FragmentOsdAlg extends FragmentSdDataViewer {
+    public FragmentOsdAlg() {
+        // Required empty public constructor
+    }
+
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_osdalg, container, false);
+    }
+}
diff --git a/app/src/main/java/uk/org/openseizuredetector/FragmentSdDataViewer.java b/app/src/main/java/uk/org/openseizuredetector/FragmentSdDataViewer.java
new file mode 100644
index 0000000..d363ea7
--- /dev/null
+++ b/app/src/main/java/uk/org/openseizuredetector/FragmentSdDataViewer.java
@@ -0,0 +1,35 @@
+package uk.org.openseizuredetector;
+
+import android.os.Bundle;
+
+import androidx.fragment.app.Fragment;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+/**
+ * A simple {@link Fragment} subclass.
+ * Use the {@link FragmentSdDataViewer#newInstance} factory method to
+ * create an instance of this fragment.
+ */
+public class FragmentSdDataViewer extends Fragment {
+
+
+    public FragmentSdDataViewer() {
+        // Required empty public constructor
+    }
+
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_sd_data_viewer, container, false);
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/uk/org/openseizuredetector/MainActivity2.java b/app/src/main/java/uk/org/openseizuredetector/MainActivity2.java
new file mode 100644
index 0000000..3cfaf72
--- /dev/null
+++ b/app/src/main/java/uk/org/openseizuredetector/MainActivity2.java
@@ -0,0 +1,20 @@
+package uk.org.openseizuredetector;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.os.Bundle;
+
+public class MainActivity2 extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main2);
+        if (savedInstanceState == null) {
+            getSupportFragmentManager().beginTransaction()
+                    .setReorderingAllowed(true)
+                    .add(R.id.fragment_container_view, FragmentOsdAlg.class, null)
+                    .commit();
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/uk/org/openseizuredetector/StartupActivity.java b/app/src/main/java/uk/org/openseizuredetector/StartupActivity.java
index c1b6987..18f6fb5 100644
--- a/app/src/main/java/uk/org/openseizuredetector/StartupActivity.java
+++ b/app/src/main/java/uk/org/openseizuredetector/StartupActivity.java
@@ -430,7 +430,7 @@ public class StartupActivity extends AppCompatActivity {
                         try {
                             Intent intent = new Intent(
                                     getApplicationContext(),
-                                    MainActivity.class);
+                                    MainActivity2.class);
                             intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
                             startActivity(intent);
                             mStartedMainActivity = true;
diff --git a/app/src/main/res/layout/activity_main2.xml b/app/src/main/res/layout/activity_main2.xml
new file mode 100644
index 0000000..e724743
--- /dev/null
+++ b/app/src/main/res/layout/activity_main2.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity2">
+
+    <androidx.fragment.app.FragmentContainerView
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:id="@+id/fragment_container_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+         />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_osdalg.xml b/app/src/main/res/layout/fragment_osdalg.xml
new file mode 100644
index 0000000..852124f
--- /dev/null
+++ b/app/src/main/res/layout/fragment_osdalg.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FragmentSdDataViewer">
+
+    <!-- TODO: Update blank fragment layout -->
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:text="Fragment_OsdAlg" />
+
+</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_sd_data_viewer.xml b/app/src/main/res/layout/fragment_sd_data_viewer.xml
new file mode 100644
index 0000000..52bcf02
--- /dev/null
+++ b/app/src/main/res/layout/fragment_sd_data_viewer.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FragmentSdDataViewer">
+
+    <!-- TODO: Update blank fragment layout -->
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:text="@string/hello_blank_fragment" />
+
+</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 32ea311..1b782d7 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -555,4 +555,9 @@
         libero vel nunc consequat, quis tincidunt nisl eleifend. Cras bibendum enim a justo luctus
         vestibulum. Fusce dictum libero quis erat maximus, vitae volutpat diam dignissim.
     </string>
+    <string name="title_activity_main2">MainActivity2</string>
+    <string name="tab_text_1">Tab 1</string>
+    <string name="tab_text_2">Tab 2</string>
+    <!-- TODO: Remove or change this placeholder text -->
+    <string name="hello_blank_fragment">Hello blank fragment</string>
 </resources>