diff --git a/app/build.gradle b/app/build.gradle
index 6b56ffa..91a2cd4 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -56,6 +56,9 @@ dependencies {
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'com.github.doyaaaaaken:kotlin-csv-jvm:0.7.3'
     implementation "androidx.cardview:cardview:1.0.0"
+    implementation 'androidx.navigation:navigation-fragment-ktx:2.0.0'
+    implementation 'androidx.navigation:navigation-ui-ktx:2.0.0'
+    implementation 'androidx.preference:preference:1.1.0-rc01'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 2f3f481..7df836f 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -20,9 +20,10 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-        <activity android:name=".activities.SingleAppActivity" android:screenOrientation="portrait"
-            tools:ignore="LockedOrientationActivity">
-        </activity>
+        <activity
+            android:name=".activities.SettingsActivity"
+            android:label="@string/title_activity_settings"
+            android:parentActivityName=".activities.MainActivity"/>
         <activity android:name=".activities.AppsListActivity" />
         <activity
             android:name=".activities.SingleAppActivity"
diff --git a/app/src/main/java/com/illusionware/npsbrowser/ThemePreference.kt b/app/src/main/java/com/illusionware/npsbrowser/ThemePreference.kt
new file mode 100644
index 0000000..288265f
--- /dev/null
+++ b/app/src/main/java/com/illusionware/npsbrowser/ThemePreference.kt
@@ -0,0 +1,34 @@
+package com.illusionware.npsbrowser
+
+import android.content.Context
+import android.util.AttributeSet
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.preference.ListPreference
+
+class ThemePreference : ListPreference {
+    constructor(context : Context?, attrs : AttributeSet?, defStyleAttr : Int) : super(context, attrs, defStyleAttr)
+
+    constructor(context : Context?, attrs : AttributeSet?) : super(context, attrs)
+
+    constructor(context : Context?) : super(context)
+
+    override fun callChangeListener(newValue : Any?) : Boolean {
+        AppCompatDelegate.setDefaultNightMode(when ((newValue as String).toInt()) {
+            0 -> AppCompatDelegate.MODE_NIGHT_NO
+            1 -> AppCompatDelegate.MODE_NIGHT_YES
+            2 -> AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM
+            else -> AppCompatDelegate.MODE_NIGHT_UNSPECIFIED
+        })
+
+        return super.callChangeListener(newValue)
+    }
+
+    override fun setValue(value: String?) {
+        super.setValue(value)
+        summary = value
+    }
+
+    override fun setSummary(summary: CharSequence?) {
+        super.setSummary(entry)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/illusionware/npsbrowser/activities/AppsListActivity.kt b/app/src/main/java/com/illusionware/npsbrowser/activities/AppsListActivity.kt
index 2c48c2e..37c0718 100644
--- a/app/src/main/java/com/illusionware/npsbrowser/activities/AppsListActivity.kt
+++ b/app/src/main/java/com/illusionware/npsbrowser/activities/AppsListActivity.kt
@@ -4,7 +4,6 @@ import android.content.Intent
 import android.os.Bundle
 import android.view.View
 import android.widget.Toast
-import androidx.appcompat.app.AppCompatActivity
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.illusionware.npsbrowser.AppData
@@ -12,7 +11,7 @@ import com.illusionware.npsbrowser.RecyclerTouchListener
 import com.illusionware.npsbrowser.adapters.AppAdapter
 import com.illusionware.npsbrowser.databinding.ActivityAppsListBinding
 
-class AppsListActivity : AppCompatActivity() {
+class AppsListActivity : BaseActivity() {
     companion object {
         lateinit var apps : ArrayList<AppData>
     }
diff --git a/app/src/main/java/com/illusionware/npsbrowser/activities/BaseActivity.kt b/app/src/main/java/com/illusionware/npsbrowser/activities/BaseActivity.kt
new file mode 100644
index 0000000..e31284f
--- /dev/null
+++ b/app/src/main/java/com/illusionware/npsbrowser/activities/BaseActivity.kt
@@ -0,0 +1,40 @@
+package com.illusionware.npsbrowser.activities
+
+import android.content.SharedPreferences
+import android.content.res.Configuration
+import android.os.Bundle
+import android.view.View
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.preference.PreferenceManager
+import com.illusionware.npsbrowser.R
+
+open class BaseActivity : AppCompatActivity() {
+
+    private lateinit var sharedPreferences : SharedPreferences
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        PreferenceManager.setDefaultValues(this, R.xml.root_preferences, false)
+        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this)
+        val decor: View = window.decorView
+
+        AppCompatDelegate.setDefaultNightMode(when ((sharedPreferences.getString("app_theme", "2")?.toInt())) {
+            0 ->  {
+                decor.systemUiVisibility = View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR;
+                AppCompatDelegate.MODE_NIGHT_NO
+            }
+            1 -> {
+                decor.systemUiVisibility = 0;
+                AppCompatDelegate.MODE_NIGHT_YES
+            }
+            2 -> {
+                decor.systemUiVisibility = if (resources.configuration.uiMode and
+                    Configuration.UI_MODE_NIGHT_MASK == Configuration.UI_MODE_NIGHT_YES) 0 else View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
+                AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM
+            }
+            else -> AppCompatDelegate.MODE_NIGHT_UNSPECIFIED
+        })
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/illusionware/npsbrowser/activities/MainActivity.kt b/app/src/main/java/com/illusionware/npsbrowser/activities/MainActivity.kt
index 69be772..430ebb3 100644
--- a/app/src/main/java/com/illusionware/npsbrowser/activities/MainActivity.kt
+++ b/app/src/main/java/com/illusionware/npsbrowser/activities/MainActivity.kt
@@ -16,7 +16,7 @@ import com.illusionware.npsbrowser.databinding.ActivityMainBinding
 import kotlinx.android.synthetic.main.appbar.*
 import java.io.InputStream
 
-class MainActivity : AppCompatActivity() {
+class MainActivity : BaseActivity() {
 
     private val tsvReader = csvReader {
         charset = "UTF-8"
@@ -52,6 +52,8 @@ class MainActivity : AppCompatActivity() {
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         return when (item.itemId) {
             R.id.action_settings -> {
+                val settingsIntent = Intent(this, SettingsActivity::class.java)
+                startActivity(settingsIntent)
                 true
             }
             else -> return super.onOptionsItemSelected(item)
@@ -65,7 +67,7 @@ class MainActivity : AppCompatActivity() {
                 val inputStream: InputStream? = contentResolver.openInputStream(uri)
                 val entries : List<Map<String, String?>> = tsvReader.readAllWithHeader(inputStream!!)
                 val myIntent = Intent(this, AppsListActivity::class.java)
-                var apps = ArrayList<AppData>(entries.size)
+                val apps = ArrayList<AppData>(entries.size)
 
                 entries.forEach { entry ->
                     if (entry["Name"].isNullOrEmpty()) {
@@ -81,7 +83,7 @@ class MainActivity : AppCompatActivity() {
                     val fileSize = entry["File Size"]?.toLongOrNull()
                     val sha256 = entry["SHA256"]
                     val minFW = entry["Required FW"]
-                    var app = AppData(id, region, name, link ?: "MISSING", license ?: "MISSING",
+                    val app = AppData(id, region, name, link ?: "MISSING", license ?: "MISSING",
                         contentID ?: "MISSING", lastDateTime ?: "MISSING",
                         fileSize ?: 0, sha256 ?: "MISSING", minFW)
                     apps.add(app)
diff --git a/app/src/main/java/com/illusionware/npsbrowser/activities/SettingsActivity.kt b/app/src/main/java/com/illusionware/npsbrowser/activities/SettingsActivity.kt
new file mode 100644
index 0000000..d072484
--- /dev/null
+++ b/app/src/main/java/com/illusionware/npsbrowser/activities/SettingsActivity.kt
@@ -0,0 +1,35 @@
+package com.illusionware.npsbrowser.activities
+
+import android.os.Bundle
+import androidx.preference.PreferenceFragmentCompat
+import androidx.preference.PreferenceManager
+import com.illusionware.npsbrowser.R
+import com.illusionware.npsbrowser.databinding.SettingsActivityBinding
+import kotlinx.android.synthetic.main.appbar.*
+
+class SettingsActivity : BaseActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        val binding = SettingsActivityBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        setSupportActionBar(toolbar)
+
+        supportFragmentManager
+            .beginTransaction()
+            .replace(
+                R.id.settings,
+                SettingsFragment()
+            )
+            .commit()
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+    }
+
+    class SettingsFragment : PreferenceFragmentCompat() {
+        override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+            setPreferencesFromResource(R.xml.root_preferences, rootKey)
+            PreferenceManager.setDefaultValues(context, R.xml.root_preferences, false);
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/illusionware/npsbrowser/activities/SingleAppActivity.kt b/app/src/main/java/com/illusionware/npsbrowser/activities/SingleAppActivity.kt
index 6d4b2fd..c4abaa0 100644
--- a/app/src/main/java/com/illusionware/npsbrowser/activities/SingleAppActivity.kt
+++ b/app/src/main/java/com/illusionware/npsbrowser/activities/SingleAppActivity.kt
@@ -1,11 +1,10 @@
 package com.illusionware.npsbrowser.activities
 
 import android.os.Bundle
-import androidx.appcompat.app.AppCompatActivity
 import com.illusionware.npsbrowser.AppData
 import com.illusionware.npsbrowser.databinding.ActivitySingleAppBinding
 
-class SingleAppActivity: AppCompatActivity() {
+class SingleAppActivity: BaseActivity() {
     companion object {
         lateinit var app : AppData
     }
diff --git a/app/src/main/res/layout/activity_single_app.xml b/app/src/main/res/layout/activity_single_app.xml
index 4fb40ff..9040fb9 100644
--- a/app/src/main/res/layout/activity_single_app.xml
+++ b/app/src/main/res/layout/activity_single_app.xml
@@ -14,7 +14,6 @@
         android:layout_marginTop="8dp"
         android:layout_marginEnd="48dp"
         android:fontFamily="sans-serif-medium"
-        android:text="gameTitle"
         android:textAlignment="center"
         android:textSize="24sp"
         android:textStyle="bold"
@@ -30,7 +29,6 @@
         android:layout_marginTop="56dp"
         android:layout_marginEnd="48dp"
         android:fontFamily="sans-serif-smallcaps"
-        android:text="titleID"
         android:textAlignment="center"
         android:textSize="24sp"
         android:textStyle="bold"
@@ -53,7 +51,7 @@
             android:layout_marginStart="140dp"
             android:layout_marginTop="30dp"
             android:layout_marginEnd="141dp"
-            android:contentDescription="Game Icon"
+            android:contentDescription="game Icon"
             app:srcCompat="@drawable/ic_games_black_24dp" />
 
     </LinearLayout>
diff --git a/app/src/main/res/layout/list_item.xml b/app/src/main/res/layout/list_item.xml
index 33944dd..f10fad1 100644
--- a/app/src/main/res/layout/list_item.xml
+++ b/app/src/main/res/layout/list_item.xml
@@ -36,7 +36,6 @@
                     android:paddingEnd="4dp"
                     android:paddingRight="10dp"
                     android:paddingBottom="4dp"
-                    android:text="US"
                     android:textAlignment="center"
                     android:textColor="@color/colorOnSecondary"
                     app:layout_constraintBottom_toBottomOf="parent"
@@ -54,7 +53,6 @@
                     android:marqueeRepeatLimit="marquee_forever"
                     android:scrollHorizontally="true"
                     android:singleLine="true"
-                    android:text="Placeholder"
                     android:textAlignment="viewStart"
                     android:textAppearance="?android:attr/textAppearanceListItem"
                     android:textColor="@color/colorOnPrimary"
@@ -67,6 +65,7 @@
                     android:id="@+id/imageView"
                     android:layout_width="62dp"
                     android:layout_height="56dp"
+                    android:contentDescription="game icon"
                     app:layout_constraintBottom_toBottomOf="parent"
                     app:layout_constraintStart_toStartOf="parent"
                     app:layout_constraintTop_toTopOf="parent"
@@ -79,7 +78,6 @@
                     android:layout_marginStart="8dp"
                     android:background="@drawable/rect_red"
                     android:padding="4dp"
-                    android:text="3.60"
                     android:textAlignment="center"
                     android:textColor="@color/colorOnSecondary"
                     app:layout_constraintBottom_toBottomOf="parent"
@@ -90,7 +88,6 @@
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:padding="4dp"
-                    android:text="2020-5-5"
                     android:textColor="@color/colorOnSecondary"
                     app:layout_constraintBottom_toBottomOf="parent"
                     app:layout_constraintEnd_toEndOf="parent" />
diff --git a/app/src/main/res/layout/settings_activity.xml b/app/src/main/res/layout/settings_activity.xml
new file mode 100644
index 0000000..8123489
--- /dev/null
+++ b/app/src/main/res/layout/settings_activity.xml
@@ -0,0 +1,14 @@
+<LinearLayout 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"
+    android:baselineAligned="false"
+    android:orientation="vertical">
+
+    <include layout="@layout/appbar" />
+
+    <FrameLayout
+        android:id="@+id/settings"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/menu/toolbar_main.xml b/app/src/main/res/menu/toolbar_main.xml
index 5a3bca0..21b0794 100644
--- a/app/src/main/res/menu/toolbar_main.xml
+++ b/app/src/main/res/menu/toolbar_main.xml
@@ -4,7 +4,7 @@
     <item
         android:id="@+id/action_settings"
         android:icon="@drawable/ic_settings"
+        android:title="@string/title_activity_settings"
         app:iconTint="?attr/colorOnPrimary"
-        android:title="settings"
         app:showAsAction="ifRoom" />
 </menu>
\ No newline at end of file
diff --git a/app/src/main/res/values/arrays.xml b/app/src/main/res/values/arrays.xml
new file mode 100644
index 0000000..7ca39db
--- /dev/null
+++ b/app/src/main/res/values/arrays.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string-array name="app_theme">
+        <item>Light</item>
+        <item>Dark</item>
+        <item>Use System Default</item>
+    </string-array>
+    <string-array name="app_theme_val">
+        <item>0</item>
+        <item>1</item>
+        <item>2</item>
+    </string-array>
+</resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 6c67f93..aa9676c 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,4 @@
 <resources>
     <string name="app_name">NPS Browser</string>
+    <string name="title_activity_settings">Settings</string>
 </resources>
diff --git a/app/src/main/res/xml/root_preferences.xml b/app/src/main/res/xml/root_preferences.xml
new file mode 100644
index 0000000..c22af9e
--- /dev/null
+++ b/app/src/main/res/xml/root_preferences.xml
@@ -0,0 +1,12 @@
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+    <PreferenceCategory android:title="Customization">
+
+        <com.illusionware.npsbrowser.ThemePreference
+            android:defaultValue="2"
+            android:entries="@array/app_theme"
+            android:entryValues="@array/app_theme_val"
+            android:key="app_theme"
+            android:title="Theme" />
+    </PreferenceCategory>
+</PreferenceScreen>
\ No newline at end of file