diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 143e41d..ca1fd5f 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -3,10 +3,9 @@
     xmlns:tools="http://schemas.android.com/tools"
     package="com.denizd.substitutionplan">
 
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
-    <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" android:required="true"/>
+    <uses-permission android:name="android.permission.INTERNET" android:required="true"/>
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" android:required="true"/>
 
     <application
         android:allowBackup="true"
@@ -39,7 +38,8 @@
 
         <service
             android:name=".NotificationService"
-            android:permission="android.permission.BIND_JOB_SERVICE" />
+            android:permission="android.permission.BIND_JOB_SERVICE"
+            android:required="true"/>
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/res/drawable-v21/ic_avhlogo_splash.xml b/app/src/main/res/drawable-v21/ic_avhlogo_splash.xml
new file mode 100644
index 0000000..c25ff29
--- /dev/null
+++ b/app/src/main/res/drawable-v21/ic_avhlogo_splash.xml
@@ -0,0 +1,5 @@
+<vector android:height="120dp" android:viewportHeight="26.073"
+    android:viewportWidth="54.31" android:width="250dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@color/splash_logo"
+        android:pathData="m0.642,26.05c-0.1793,-0.0546 -0.3227,-0.1912 -0.423,-0.4034 -0.0868,-0.1835 -0.1299,-0.3499 -0.18,-0.6953 -0.0644,-0.4438 -0.0501,-2.2083 0.0447,-5.5298 0.0442,-1.5476 0.0862,-2.9233 0.0933,-3.0572l0.013,-0.2434 0.1555,-0.0798c0.0855,-0.0439 0.351,-0.1848 0.59,-0.313 0.6131,-0.329 1.3794,-0.7385 1.597,-0.8535 0.1016,-0.0537 0.2971,-0.1587 0.4346,-0.2334 0.1374,-0.0747 0.3525,-0.1897 0.478,-0.2556 0.5334,-0.2802 1.5092,-0.8133 1.8615,-1.017 0.1116,-0.0645 0.2961,-0.1712 0.4099,-0.237 0.2127,-0.123 0.2696,-0.157 0.4011,-0.2397 0.0418,-0.0263 0.1543,-0.0937 0.2499,-0.1497 0.5553,-0.3255 1.6814,-1.0279 2.6508,-1.6533 0.0597,-0.0386 0.1966,-0.1268 0.3042,-0.1961 1.5001,-0.9666 3.6523,-2.4484 4.954,-3.4109 0.3582,-0.2649 1.7314,-1.2221 2.6279,-1.8318 0.7716,-0.5248 2.8139,-1.8787 3.0062,-1.9929 0.0394,-0.0234 0.2252,-0.1412 0.4128,-0.2616s0.4487,-0.2859 0.5801,-0.3677c0.1315,-0.0817 0.3026,-0.1893 0.3802,-0.239 0.2592,-0.1659 1.2231,-0.7326 1.7869,-1.0506 0.5592,-0.3154 1.4818,-0.7903 1.8091,-0.9313 0.6104,-0.2629 1.1407,-0.4489 1.5055,-0.5279 0.1138,-0.0247 0.214,-0.0492 0.2227,-0.0546 0.0322,-0.0199 0.8012,-0.1391 1.0422,-0.1616 0.979,-0.0913 3.2692,-0.0911 4.313,0.0003 1.4035,0.123 2.2951,0.4492 2.6451,0.9679 0.165,0.2444 0.2002,0.3755 0.2007,0.7474 0.0006,0.411 -0.0696,0.716 -0.284,1.2338 -0.3755,0.907 -1.5233,2.5827 -2.7325,3.9889 -0.9585,1.1147 -1.8375,2.4001 -2.4388,3.5662 -0.2381,0.4618 -0.346,0.7207 -0.5387,1.2928 -0.4305,1.2778 -0.4186,1.6374 0.0757,2.2952 0.4236,0.5637 0.9046,0.8012 1.9082,0.9422 0.0887,0.0125 0.3794,0.0227 0.646,0.0227 1.0896,0 2.4249,-0.253 3.886,-0.7363 0.3467,-0.1147 1.0184,-0.3616 1.2494,-0.4593 0.0538,-0.0227 0.1955,-0.0816 0.3151,-0.1309 0.3765,-0.1551 0.5845,-0.2417 0.6518,-0.2713 0.0358,-0.0158 0.163,-0.0696 0.2825,-0.1195 0.1195,-0.05 0.3102,-0.1304 0.4237,-0.1786 0.1135,-0.0483 0.2895,-0.1216 0.3911,-0.1629 0.1016,-0.0413 0.2433,-0.0998 0.3151,-0.1299 0.0717,-0.0301 0.1988,-0.0819 0.2825,-0.115 0.0837,-0.0331 0.2743,-0.1087 0.4237,-0.168 0.6645,-0.2636 0.8709,-0.3322 1.1652,-0.3875 0.4255,-0.0799 0.6165,0.0135 0.6831,0.3339 0.016,0.0772 0.028,0.4053 0.0319,0.8732 0.0065,0.7894 0.0264,1.0214 0.1199,1.401 0.1968,0.799 0.5825,1.2477 1.3058,1.5194 0.3784,0.1421 1.0799,0.2763 1.6675,0.3188 0.3938,0.0285 1.8687,0.0141 2.2077,-0.0216 1.7553,-0.1848 3.1116,-0.488 4.4108,-0.9862 0.2568,-0.0985 0.7865,-0.3131 0.8691,-0.3522 0.0901,-0.0426 0.2578,-0.1131 0.4128,-0.1737 0.0717,-0.028 0.2135,-0.0867 0.3151,-0.1303 0.1016,-0.0437 0.2433,-0.1025 0.3151,-0.1308 0.0717,-0.0282 0.2135,-0.0867 0.3151,-0.13 0.1016,-0.0433 0.2433,-0.1017 0.3151,-0.13 0.0717,-0.0282 0.2128,-0.0862 0.3135,-0.1288 0.1007,-0.0426 0.1877,-0.0729 0.1932,-0.0674 0.0104,0.0104 0.0053,0.0676 -0.1055,1.1898 -0.071,0.7187 -0.1146,0.9429 -0.2464,1.2663 -0.2098,0.5145 -0.7032,1.0472 -1.5039,1.6232 -0.1778,0.1279 -0.9153,0.6186 -1.0884,0.7241 -1.8174,1.1078 -2.509,1.4324 -3.5921,1.6858 -0.8303,0.1943 -2.059,0.2746 -3.8024,0.2487 -0.9463,-0.0141 -1.1963,-0.026 -1.8252,-0.0868 -0.591,-0.0572 -0.9542,-0.126 -1.3471,-0.2555 -0.4719,-0.1555 -0.6843,-0.2909 -1.1215,-0.7153 -0.1842,-0.1788 -0.387,-0.3584 -0.4505,-0.3991 -0.3994,-0.2555 -0.8111,-0.2864 -1.6111,-0.1208 -0.2518,0.0521 -0.825,0.1934 -1.1081,0.2733 -0.1076,0.0303 -0.3178,0.0881 -0.4672,0.1285 -0.1494,0.0404 -0.4036,0.109 -0.5649,0.1527 -1.0207,0.2759 -2.3356,0.5132 -3.3678,0.6077 -0.9254,0.0847 -2.1742,0.0853 -3.0001,0.001 -0.3103,-0.0315 -1.0002,-0.1322 -1.063,-0.1551 -0.0179,-0.007 -0.1499,-0.0358 -0.2933,-0.0649 -0.1434,-0.0292 -0.3487,-0.0781 -0.4563,-0.1087 -0.2615,-0.0744 -0.886,-0.2842 -0.9973,-0.335 -0.049,-0.0224 -0.1498,-0.0657 -0.224,-0.0963 -0.598,-0.2465 -1.384,-0.7544 -1.8513,-1.1964 -0.9436,-0.8924 -1.3564,-2.0681 -1.2817,-3.6505 0.0193,-0.4081 0.0205,-0.4203 0.0997,-0.9778 0.1124,-0.7911 0.0607,-1.4115 -0.1259,-1.5114 -0.0853,-0.0457 -0.3493,0.0288 -0.7149,0.2015 -0.3416,0.1614 -1.1258,0.5975 -1.4555,0.8094 -0.0418,0.0269 -0.2374,0.1503 -0.4346,0.2742 -0.4157,0.2612 -1.416,0.9297 -1.8686,1.2487 -0.0418,0.0295 -0.1215,0.0853 -0.177,0.1239 -0.0555,0.0387 -0.2154,0.1535 -0.3552,0.255 -0.1399,0.1016 -0.2949,0.2135 -0.3445,0.2487 -0.4102,0.291 -1.4365,1.0783 -2.1109,1.6191 -1.4979,1.2014 -2.884,2.2429 -4.237,3.184 -0.1817,0.1264 -1.0192,0.686 -1.2494,0.8348 -0.4025,0.2603 -0.5367,0.3456 -0.5975,0.3799 -0.0358,0.0202 -0.1727,0.1041 -0.3042,0.1866 -0.1314,0.0824 -0.3172,0.1957 -0.4128,0.2518 -0.0956,0.0561 -0.208,0.1241 -0.2499,0.1512 -0.1088,0.0703 -0.5731,0.339 -0.8909,0.5155 -0.1494,0.083 -0.2814,0.1585 -0.2933,0.1677 -0.0307,0.0238 -0.8824,0.4882 -1.195,0.6517 -0.1434,0.075 -0.3292,0.1731 -0.4128,0.2181 -0.4406,0.2368 -2.7812,1.4179 -3.0311,1.5296 -0.0777,0.0347 -0.1999,0.0901 -0.2716,0.1232 -0.3531,0.1628 -0.8439,0.337 -1.072,0.3807 -0.1687,0.0323 -0.4989,0.038 -0.5903,0.0102z" android:strokeWidth=".021728"/>
+</vector>
diff --git a/app/src/main/res/drawable-v28/launch_screen.xml b/app/src/main/res/drawable-v28/launch_screen.xml
new file mode 100644
index 0000000..9cc804a
--- /dev/null
+++ b/app/src/main/res/drawable-v28/launch_screen.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android" android:opacity="opaque">
+
+    <item android:drawable="@color/background"/>
+
+    <item android:drawable="@drawable/ic_avhlogo_splash"
+        android:gravity="center"
+        android:scaleType="centerInside">
+    </item>
+
+</layer-list>
\ No newline at end of file
diff --git a/app/src/main/res/layout/app_bar_main.xml b/app/src/main/res/layout/app_bar_main.xml
index 57628a4..8b00fde 100644
--- a/app/src/main/res/layout/app_bar_main.xml
+++ b/app/src/main/res/layout/app_bar_main.xml
@@ -86,30 +86,6 @@
         android:clickable="true"
         android:focusable="true"/>
 
-    <com.google.android.material.bottomnavigation.BottomNavigationView
-        android:id="@+id/bottom_nav"
-        android:layout_width="match_parent"
-        android:layout_height="56dp"
-        android:layout_marginBottom="0dp"
-        app:elevation="0dp"
-        app:layout_anchor="@+id/bottom_sheet"
-        android:layout_gravity="bottom"
-        app:menu="@menu/nav_items"
-        android:background="@color/background"
-        app:itemIconTint="@color/bottom_nav_color"
-        app:itemTextColor="@color/bottom_nav_color"
-        app:itemRippleColor="@color/accent"/>
-
-    <View
-        android:id="@+id/bottom_nav_divider"
-        android:layout_width="match_parent"
-        android:layout_height="1dp"
-        android:layout_marginStart="8dp"
-        android:layout_marginEnd="8dp"
-        app:layout_anchor="@+id/bottom_sheet"
-        android:layout_gravity="top"
-        android:background="@color/lighthintcolor"/>
-
     <include layout="@layout/bottom_sheet" />
 
     <androidx.coordinatorlayout.widget.CoordinatorLayout
diff --git a/app/src/main/res/layout/bottom_sheet.xml b/app/src/main/res/layout/bottom_sheet.xml
index ac84808..3958e93 100644
--- a/app/src/main/res/layout/bottom_sheet.xml
+++ b/app/src/main/res/layout/bottom_sheet.xml
@@ -6,15 +6,41 @@
     android:layout_height="wrap_content"
     android:background="@android:color/transparent"
     android:orientation="vertical"
-    android:paddingTop="56dp"
+    android:paddingTop="0dp"
     app:behavior_hideable="false"
     app:behavior_peekHeight="56dp"
     app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">
 
-    <androidx.core.widget.NestedScrollView
+    <View
+        android:id="@+id/bottom_nav_divider"
+        android:layout_width="match_parent"
+        android:layout_height="1dp"
+        android:layout_marginStart="8dp"
+        android:layout_marginEnd="8dp"
+        app:layout_anchor="@+id/bottom_sheet"
+        android:layout_gravity="top"
+        android:background="@color/lighthintcolor"/>
+
+    <com.google.android.material.bottomnavigation.BottomNavigationView
+        android:id="@+id/bottom_nav"
+        android:layout_width="match_parent"
+        android:layout_height="56dp"
+        android:layout_marginBottom="0dp"
+        app:elevation="0dp"
+        app:layout_anchor="@+id/bottom_sheet"
+        android:layout_gravity="bottom"
+        app:menu="@menu/nav_items"
+        android:background="@color/background"
+        app:itemIconTint="@color/bottom_nav_color"
+        app:itemTextColor="@color/bottom_nav_color"
+        app:itemRippleColor="@color/accent"/>
+
+    <ScrollView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:scrollbars="vertical">
+        android:scrollbars="vertical"
+        android:clickable="true"
+        android:focusable="true">
 
         <LinearLayout
             android:id="@+id/bottom_sheet_linear"
@@ -23,32 +49,18 @@
             android:layout_height="wrap_content"
             android:background="@color/background">
 
-            <LinearLayout
-                android:layout_width="match_parent"
+            <TextView
+                android:id="@+id/bottom_sheet_header"
+                android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:orientation="horizontal"
-                android:layout_marginStart="16dp"
-                android:layout_marginEnd="16dp"
-                android:layout_marginTop="4dp">
-
-                <ImageView
-                    android:id="@+id/info_icon"
-                    android:layout_width="wrap_content"
-                    android:layout_height="match_parent"
-                    android:src="@drawable/ic_information"
-                    android:tint="@color/textcolor"/>
-
-                <TextView
-                    android:id="@+id/bottom_sheet_header"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:layout_marginStart="8dp"
-                    android:gravity="top|start"
-                    android:text="@string/information"
-                    android:textSize="16sp"
-                    android:textColor="@color/textcolor"/>
-
-            </LinearLayout>
+                android:drawableStart="@drawable/ic_information"
+                android:drawableTint="@color/textcolor"
+                android:paddingStart="16dp"
+                android:drawablePadding="8dp"
+                android:gravity="top|start"
+                android:text="@string/information"
+                android:textSize="16sp"
+                android:textColor="@color/textcolor"/>
 
             <TextView
                 android:id="@+id/bottom_sheet_text"
@@ -62,6 +74,6 @@
 
         </LinearLayout>
 
-    </androidx.core.widget.NestedScrollView>
+    </ScrollView>
 
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 550740d..3297ecc 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -72,7 +72,7 @@
     <string name="donttell">Er darf das nicht erfahren :0</string>
     <string name="fortest">Dieses Menü ist derzeit nur für Tests gedacht. Zusätzliche Funktionalität könnte in der Zukunft hinzugefügt werden. Probier\' gerne zufällige Codes aus.</string>
     <string name="positivebutton">Anwenden</string>
-    <string name="nothinghappened">Nichts ist geschehen.</string>
+    <string name="nothinghappened">Ungültiger Code</string>
     <string name="experimentalmenu">Experimentalmenü</string>
     <string name="diagnosticsmenu">Diagnosemenü</string>
     <string name="calculate">Berechnen</string>
diff --git a/app/src/main/res/values-night/colors.xml b/app/src/main/res/values-night/colors.xml
index b1ca704..8de9134 100644
--- a/app/src/main/res/values-night/colors.xml
+++ b/app/src/main/res/values-night/colors.xml
@@ -18,4 +18,6 @@
     <color name="bgpink">#5A2345</color>
     <color name="bgbrown">#442F1B</color>
     <color name="bggrey">#3C3F43</color>
+
+    <color name="splash_logo">@color/textcolor</color>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index d93b49a..70873d2 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -24,4 +24,6 @@
 
     <color name="mtrl_textinput_default_box_stroke_color" tools:override="true">#757575</color>
 
+    <color name="splash_logo">@color/accent</color>
+
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 8ed16a0..36bfb1b 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -84,7 +84,7 @@
     <string name="diagnosticsmenu">Diagnostics Menu</string>
     <string name="fortest">This menu is currently intended for testing only. Additional features may be added in the future. Feel free to try arbitrary codes.</string>
     <string name="positivebutton">Apply</string>
-    <string name="nothinghappened">Nothing happened.</string>
+    <string name="nothinghappened">Invalid code</string>
     <string name="calculate">Calculate</string>
     <string name="boy">Boy</string>
     <string name="girl">Girl</string>