diff --git a/app/src/main/res/layout-land/cpp_app_keyboard_mobile.xml b/app/src/main/res/layout-land/cpp_app_keyboard_mobile.xml
deleted file mode 100644
index 5be818a2..00000000
--- a/app/src/main/res/layout-land/cpp_app_keyboard_mobile.xml
+++ /dev/null
@@ -1,99 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<!--
-  ~ Copyright 2013 serso aka se.solovyev
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~    http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
-  ~
-  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-  ~ Contact details
-  ~
-  ~ Email: se.solovyev@gmail.com
-  ~ Site:  http://se.solovyev.org
-  -->
-
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_vars" />
-
-        <include layout="@layout/cpp_app_button_copy" />
-
-        <include layout="@layout/cpp_app_button_7" />
-
-        <include layout="@layout/cpp_app_button_8" />
-
-        <include layout="@layout/cpp_app_button_9" />
-
-        <include layout="@layout/cpp_app_button_multiplication" />
-
-        <include layout="@layout/cpp_app_button_division" />
-
-        <include layout="@layout/cpp_app_button_equals" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_functions" />
-
-        <include layout="@layout/cpp_app_button_paste" />
-
-        <include layout="@layout/cpp_app_button_4" />
-
-        <include layout="@layout/cpp_app_button_5" />
-
-        <include layout="@layout/cpp_app_button_6" />
-
-        <include layout="@layout/cpp_app_button_plus" />
-
-        <include layout="@layout/cpp_app_button_minus" />
-
-        <include layout="@layout/cpp_app_button_round_brackets" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_operators" />
-
-        <include layout="@layout/cpp_app_button_donate" />
-
-        <include layout="@layout/cpp_app_button_1" />
-
-        <include layout="@layout/cpp_app_button_2" />
-
-        <include layout="@layout/cpp_app_button_3" />
-
-        <include layout="@layout/cpp_app_button_0" />
-
-        <include layout="@layout/cpp_app_button_dot" />
-
-        <include layout="@layout/cpp_app_button_history" />
-
-    </LinearLayout>
-
-</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/cpp_app_keyboard_mobile.xml b/app/src/main/res/layout/cpp_app_keyboard_mobile.xml
deleted file mode 100644
index fa3079a7..00000000
--- a/app/src/main/res/layout/cpp_app_keyboard_mobile.xml
+++ /dev/null
@@ -1,116 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<!--
-  ~ Copyright 2013 serso aka se.solovyev
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~    http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
-  ~
-  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-  ~ Contact details
-  ~
-  ~ Email: se.solovyev@gmail.com
-  ~ Site:  http://se.solovyev.org
-  -->
-
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
-    a:layout_width="match_parent"
-    a:layout_height="match_parent"
-    a:orientation="vertical">
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_7" />
-
-        <include layout="@layout/cpp_app_button_8" />
-
-        <include layout="@layout/cpp_app_button_9" />
-
-        <include layout="@layout/cpp_app_button_multiplication" />
-
-        <include layout="@layout/cpp_app_button_clear" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_4" />
-
-        <include layout="@layout/cpp_app_button_5" />
-
-        <include layout="@layout/cpp_app_button_6" />
-
-        <include layout="@layout/cpp_app_button_division" />
-
-        <include layout="@layout/cpp_app_button_erase" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_1" />
-
-        <include layout="@layout/cpp_app_button_2" />
-
-        <include layout="@layout/cpp_app_button_3" />
-
-        <include layout="@layout/cpp_app_button_plus" />
-
-        <include layout="@layout/cpp_app_button_copy" />
-
-    </LinearLayout>
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_round_brackets" />
-
-        <include layout="@layout/cpp_app_button_0" />
-
-        <include layout="@layout/cpp_app_button_dot" />
-
-        <include layout="@layout/cpp_app_button_minus" />
-
-        <include layout="@layout/cpp_app_button_paste" />
-
-    </LinearLayout>
-
-
-    <LinearLayout
-        a:layout_width="match_parent"
-        a:layout_height="0dp"
-        a:layout_weight="1">
-
-        <include layout="@layout/cpp_app_button_left" />
-
-        <include layout="@layout/cpp_app_button_right" />
-
-        <include layout="@layout/cpp_app_button_vars" />
-
-        <include layout="@layout/cpp_app_button_functions" />
-
-        <include layout="@layout/cpp_app_button_history" />
-
-    </LinearLayout>
-
-</LinearLayout>
\ No newline at end of file