diff --git a/app/src/main/res/layout-v21/activity_main.xml b/app/src/main/res/layout-v21/activity_main.xml
index 857b2eb..4db4862 100644
--- a/app/src/main/res/layout-v21/activity_main.xml
+++ b/app/src/main/res/layout-v21/activity_main.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<ScrollView 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"
@@ -7,302 +7,317 @@
     android:background="@color/background"
     tools:context=".MainActivity">
 
-    <androidx.cardview.widget.CardView
-        android:id="@+id/cardView_male"
-        android:layout_width="185dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="16dp"
-        android:layout_marginTop="32dp"
-        android:layout_marginEnd="8dp"
-        app:cardBackgroundColor="@color/card_background"
-        app:cardCornerRadius="10dp"
-        app:layout_constraintEnd_toStartOf="@+id/cardView_female"
-        app:layout_constraintHorizontal_chainStyle="spread"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent">
-
-        <TextView
-            android:id="@+id/male"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center|bottom"
-            android:drawablePadding="5sp"
-            android:padding="20dp"
-            android:text="@string/male"
-            android:textAlignment="center"
-            android:textColor="@color/tint"
-            android:textSize="20sp"
-            android:textStyle="bold"
-            app:drawableTopCompat="@drawable/male" />
-
-    </androidx.cardview.widget.CardView>
-
-    <androidx.cardview.widget.CardView
-        android:id="@+id/cardView_female"
-        android:layout_width="185dp"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="32dp"
-        android:layout_marginEnd="16dp"
-        app:cardBackgroundColor="@color/card_background"
-        app:cardCornerRadius="10dp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toEndOf="@+id/cardView_male"
-        app:layout_constraintTop_toTopOf="parent">
-
-        <TextView
-            android:id="@+id/female"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center|bottom"
-            android:drawablePadding="5sp"
-            android:padding="20dp"
-            android:text="@string/female"
-            android:textAlignment="center"
-            android:textColor="@color/tint"
-            android:textSize="20sp"
-            android:textStyle="bold"
-            app:drawableTopCompat="@drawable/female" />
-
-    </androidx.cardview.widget.CardView>
-
-    <androidx.cardview.widget.CardView
-        android:id="@+id/cardView5"
+    <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_margin="16dp"
-        app:cardBackgroundColor="@color/card_background"
-        app:cardCornerRadius="10dp"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toRightOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/cardView_male">
+        android:layout_height="wrap_content">
 
-        <LinearLayout
+        <androidx.cardview.widget.CardView
+            android:id="@+id/cardView_male"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="16dp"
+            android:layout_marginTop="32dp"
+            android:layout_marginEnd="8dp"
+            app:cardCornerRadius="10dp"
+            app:layout_constraintHorizontal_weight="1"
+            app:cardBackgroundColor="@color/card_background"
+            app:layout_constraintBottom_toTopOf="@+id/cardView5"
+            app:layout_constraintEnd_toStartOf="@+id/cardView_female"
+            app:layout_constraintHorizontal_chainStyle="spread"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent">
+
+            <TextView
+                android:id="@+id/male"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center|bottom"
+                android:drawablePadding="5sp"
+                android:padding="20dp"
+                android:text="@string/male"
+                android:textAlignment="center"
+                android:textColor="@color/tint"
+                android:textSize="20sp"
+                android:textStyle="bold"
+                app:drawableTopCompat="@drawable/male" />
+
+        </androidx.cardview.widget.CardView>
+
+        <androidx.cardview.widget.CardView
+            android:id="@+id/cardView_female"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="16dp"
+            app:layout_constraintHorizontal_weight="1"
+            app:cardBackgroundColor="@color/card_background"
+            app:cardCornerRadius="10dp"
+            app:layout_constraintBottom_toBottomOf="@+id/cardView_male"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@+id/cardView_male"
+            app:layout_constraintTop_toTopOf="@+id/cardView_male">
+
+            <TextView
+                android:id="@+id/female"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center|bottom"
+                android:drawablePadding="5sp"
+                android:padding="20dp"
+                android:text="@string/female"
+                android:textAlignment="center"
+                android:textColor="@color/tint"
+                android:textSize="20sp"
+                android:textStyle="bold"
+                app:drawableTopCompat="@drawable/female" />
+
+        </androidx.cardview.widget.CardView>
+
+        <androidx.cardview.widget.CardView
+            android:id="@+id/cardView5"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:gravity="center"
-            android:orientation="vertical"
-            android:padding="20dp">
+            android:layout_margin="16dp"
+            app:cardBackgroundColor="@color/card_background"
+            app:cardCornerRadius="10dp"
+            app:layout_constraintBottom_toTopOf="@+id/cardView3"
+            app:layout_constraintHorizontal_chainStyle="spread"
+            app:layout_constraintLeft_toLeftOf="parent"
+            app:layout_constraintRight_toRightOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/cardView_male">
 
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="@string/height"
-                android:textColor="#8D8E99"
-                android:textSize="20sp"
-                android:textStyle="bold" />
-
-            <TextView
-                android:id="@+id/height_txt"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="@string/_0cm"
-                android:textColor="@android:color/white"
-                android:textSize="50sp"
-                android:textStyle="bold" />
-
-            <SeekBar
-                android:id="@+id/Seekbar"
-                style="?android:attr/progressBarStyleHorizontal"
+            <LinearLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginTop="10dp"
-                android:max="200"
-                android:progressBackgroundTint="#888994"
-                android:progressTint="@android:color/white" />
-
-        </LinearLayout>
-
-    </androidx.cardview.widget.CardView>
-
-    <androidx.cardview.widget.CardView
-        android:id="@+id/cardView3"
-        android:layout_width="185dp"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="16dp"
-        android:layout_marginTop="16dp"
-        app:cardBackgroundColor="@color/card_background"
-        app:cardCornerRadius="10dp"
-        android:layout_marginEnd="8dp"
-        app:layout_constraintEnd_toStartOf="@+id/cardView4"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/cardView5">
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:gravity="center_horizontal"
-            android:orientation="vertical"
-            android:padding="15dp">
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="@string/weight"
-                android:textColor="#8D8E99"
-                android:textSize="20sp"
-                android:textStyle="bold" />
-
-            <TextView
-                android:id="@+id/weight"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_gravity="center"
-                android:text="@string/_50"
-                android:textColor="@android:color/white"
-                android:textSize="50sp"
-                android:textStyle="bold" />
-
-            <LinearLayout
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginTop="8dp"
-                android:baselineAligned="false"
-                android:gravity="center_horizontal"
-                android:weightSum="2">
-
-                <RelativeLayout
-                    android:id="@+id/weight_minus"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:layout_marginEnd="5dp"
-                    android:layout_weight="1"
-                    android:background="@drawable/stepper_background">
-
-                    <ImageView
-                        android:layout_width="60dp"
-                        android:layout_height="60dp"
-                        android:contentDescription="@string/minus"
-                        android:padding="14dp"
-                        app:srcCompat="@drawable/substract" />
-
-                </RelativeLayout>
-
-
-                <RelativeLayout
-                    android:id="@+id/weight_plus"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:layout_marginStart="5dp"
-                    android:layout_weight="1"
-                    android:background="@drawable/stepper_background">
-
-                    <ImageView
-                        android:layout_width="60dp"
-                        android:layout_height="60dp"
-                        android:contentDescription="@string/plus"
-                        android:padding="3dp"
-                        app:srcCompat="@drawable/ic_add" />
-
-                </RelativeLayout>
-
-            </LinearLayout>
-
-        </LinearLayout>
-
-    </androidx.cardview.widget.CardView>
-
-    <androidx.cardview.widget.CardView
-        android:id="@+id/cardView4"
-        android:layout_width="185dp"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
-        android:layout_marginEnd="16dp"
-        app:cardBackgroundColor="@color/card_background"
-        app:cardCornerRadius="10dp"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.5"
-        app:layout_constraintStart_toEndOf="@+id/cardView3"
-        app:layout_constraintTop_toBottomOf="@+id/cardView5">
-
-        <LinearLayout
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:gravity="center_horizontal"
-            android:orientation="vertical"
-            android:padding="15dp">
-
-            <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
                 android:gravity="center"
-                android:text="@string/age"
-                android:textColor="#8D8E99"
-                android:textSize="20sp"
-                android:textStyle="bold" />
+                android:orientation="vertical"
+                android:padding="20dp">
 
-            <TextView
-                android:id="@+id/age"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="@string/_19"
-                android:textColor="@android:color/white"
-                android:textSize="50sp"
-                android:textStyle="bold" />
-
-            <LinearLayout
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginTop="8dp"
-                android:baselineAligned="false"
-                android:gravity="center_horizontal"
-                android:weightSum="2">
-
-                <RelativeLayout
-                    android:id="@+id/age_minus"
+                <TextView
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:layout_marginEnd="5dp"
-                    android:layout_weight="1"
-                    android:background="@drawable/stepper_background">
+                    android:text="@string/height"
+                    android:textColor="#8D8E99"
+                    android:textSize="20sp"
+                    android:textStyle="bold" />
 
-                    <ImageView
-                        android:layout_width="60dp"
-                        android:layout_height="60dp"
-                        android:contentDescription="@string/minus"
-                        android:padding="14dp"
-                        app:srcCompat="@drawable/substract" />
-
-                </RelativeLayout>
-
-
-                <RelativeLayout
-                    android:id="@+id/age_plus"
+                <TextView
+                    android:id="@+id/height_txt"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:layout_marginStart="5dp"
-                    android:layout_weight="1"
-                    android:background="@drawable/stepper_background">
+                    android:text="@string/_0cm"
+                    android:textColor="@android:color/white"
+                    android:textSize="50sp"
+                    android:textStyle="bold" />
 
-                    <ImageView
-                        android:layout_width="60dp"
-                        android:layout_height="60dp"
-                        android:contentDescription="@string/plus"
-                        android:padding="3dp"
-                        app:srcCompat="@drawable/ic_add" />
-
-                </RelativeLayout>
+                <SeekBar
+                    android:id="@+id/Seekbar"
+                    style="?android:attr/progressBarStyleHorizontal"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="10dp"
+                    android:max="200"
+                    android:progressBackgroundTint="#888994"
+                    android:progressTint="@android:color/white"
+                    tools:targetApi="lollipop" />
 
             </LinearLayout>
 
-        </LinearLayout>
+        </androidx.cardview.widget.CardView>
 
-    </androidx.cardview.widget.CardView>
+        <androidx.cardview.widget.CardView
+            android:id="@+id/cardView3"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="16dp"
+            android:layout_marginEnd="8dp"
+            app:layout_constraintHorizontal_weight="1"
+            app:cardBackgroundColor="@color/card_background"
+            app:cardCornerRadius="10dp"
+            app:layout_constraintBottom_toTopOf="@+id/calculate"
+            app:layout_constraintEnd_toStartOf="@+id/cardView4"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/cardView5">
 
-    <Button
-        android:id="@+id/calculate"
-        android:layout_width="match_parent"
-        android:layout_height="55dp"
-        android:layout_marginLeft="16dp"
-        android:layout_marginTop="16dp"
-        android:layout_marginRight="16dp"
-        android:background="@drawable/calculate_btn"
-        android:text="@string/calculate"
-        android:textColor="@android:color/white"
-        android:textSize="17sp"
-        android:textStyle="bold"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/cardView3" />
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:gravity="center_horizontal"
+                android:orientation="vertical"
+                android:padding="15dp">
 
-</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/weight"
+                    android:textColor="#8D8E99"
+                    android:textSize="20sp"
+                    android:textStyle="bold" />
+
+                <TextView
+                    android:id="@+id/weight"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_gravity="center"
+                    android:text="@string/_50"
+                    android:textColor="@android:color/white"
+                    android:textSize="50sp"
+                    android:textStyle="bold" />
+
+                <LinearLayout
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:baselineAligned="false"
+                    android:gravity="center_horizontal"
+                    android:weightSum="2">
+
+                    <RelativeLayout
+                        android:id="@+id/weight_minus"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginEnd="5dp"
+                        android:layout_weight="1"
+                        android:background="@drawable/stepper_background">
+
+                        <ImageView
+                            android:layout_width="60dp"
+                            android:layout_height="60dp"
+                            android:contentDescription="@string/minus"
+                            android:padding="14dp"
+                            app:srcCompat="@drawable/substract" />
+
+                    </RelativeLayout>
+
+
+                    <RelativeLayout
+                        android:id="@+id/weight_plus"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="5dp"
+                        android:layout_weight="1"
+                        android:background="@drawable/stepper_background">
+
+                        <ImageView
+                            android:layout_width="60dp"
+                            android:layout_height="60dp"
+                            android:contentDescription="@string/plus"
+                            android:padding="3dp"
+                            app:srcCompat="@drawable/ic_add" />
+
+                    </RelativeLayout>
+
+                </LinearLayout>
+
+            </LinearLayout>
+
+        </androidx.cardview.widget.CardView>
+
+        <androidx.cardview.widget.CardView
+            android:id="@+id/cardView4"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="16dp"
+            app:cardBackgroundColor="@color/card_background"
+            app:cardCornerRadius="10dp"
+            app:layout_constraintHorizontal_weight="1"
+            app:layout_constraintBottom_toBottomOf="@+id/cardView3"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@+id/cardView3"
+            app:layout_constraintTop_toTopOf="@+id/cardView3">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:gravity="center_horizontal"
+                android:orientation="vertical"
+                android:padding="15dp">
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:gravity="center"
+                    android:text="@string/age"
+                    android:textColor="#8D8E99"
+                    android:textSize="20sp"
+                    android:textStyle="bold" />
+
+                <TextView
+                    android:id="@+id/age"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/_19"
+                    android:textColor="@android:color/white"
+                    android:textSize="50sp"
+                    android:textStyle="bold" />
+
+                <LinearLayout
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:baselineAligned="false"
+                    android:gravity="center_horizontal"
+                    android:weightSum="2">
+
+                    <RelativeLayout
+                        android:id="@+id/age_minus"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginEnd="5dp"
+                        android:layout_weight="1"
+                        android:background="@drawable/stepper_background">
+
+                        <ImageView
+                            android:layout_width="60dp"
+                            android:layout_height="60dp"
+                            android:contentDescription="@string/minus"
+                            android:padding="14dp"
+                            app:srcCompat="@drawable/substract" />
+
+                    </RelativeLayout>
+
+
+                    <RelativeLayout
+                        android:id="@+id/age_plus"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginStart="5dp"
+                        android:layout_weight="1"
+                        android:background="@drawable/stepper_background">
+
+                        <ImageView
+                            android:layout_width="60dp"
+                            android:layout_height="60dp"
+                            android:contentDescription="@string/plus"
+                            android:padding="3dp"
+                            app:srcCompat="@drawable/ic_add" />
+
+                    </RelativeLayout>
+
+                </LinearLayout>
+
+            </LinearLayout>
+
+        </androidx.cardview.widget.CardView>
+
+        <Button
+            android:id="@+id/calculate"
+            android:layout_width="match_parent"
+            android:layout_height="55dp"
+            android:layout_marginLeft="16dp"
+            android:layout_marginTop="16dp"
+            android:layout_marginRight="16dp"
+            android:layout_marginBottom="24dp"
+            android:background="@drawable/calculate_btn"
+            android:text="@string/calculate"
+            android:textColor="@android:color/white"
+            android:textSize="17sp"
+            android:textStyle="bold"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.5"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/cardView3" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</ScrollView>
\ No newline at end of file