diff --git a/Android_PreBuild/AdbWinApi.dll b/Android_PreBuild/AdbWinApi.dll
new file mode 100644
index 0000000..7abe26c
Binary files /dev/null and b/Android_PreBuild/AdbWinApi.dll differ
diff --git a/Android_PreBuild/AdbWinUsbApi.dll b/Android_PreBuild/AdbWinUsbApi.dll
new file mode 100644
index 0000000..e7a6de1
Binary files /dev/null and b/Android_PreBuild/AdbWinUsbApi.dll differ
diff --git a/Android_PreBuild/adb.exe b/Android_PreBuild/adb.exe
new file mode 100644
index 0000000..322185c
Binary files /dev/null and b/Android_PreBuild/adb.exe differ
diff --git a/Android_PreBuild/buildozer.spec b/Android_PreBuild/buildozer.spec
new file mode 100644
index 0000000..c196033
--- /dev/null
+++ b/Android_PreBuild/buildozer.spec
@@ -0,0 +1,329 @@
+[app]
+
+# (str) Title of your application
+title = Number Base Converter
+
+# (str) Package name
+package.name = baseConverter
+
+# (str) Package domain (needed for android/ios packaging)
+package.domain = mariyasha.com
+
+# (str) Source code where the main.py live
+source.dir = .
+
+# (list) Source files to include (let empty to include all the files)
+source.include_exts = py,png,jpg,kv,atlas
+
+# (list) List of inclusions using pattern matching
+#source.include_patterns = assets/*,images/*.png
+
+# (list) Source files to exclude (let empty to not exclude anything)
+#source.exclude_exts = spec
+
+# (list) List of directory to exclude (let empty to not exclude anything)
+#source.exclude_dirs = tests, bin
+
+# (list) List of exclusions using pattern matching
+#source.exclude_patterns = license,images/*/*.jpg
+
+# (str) Application versioning (method 1)
+version = 0.1
+
+# (str) Application versioning (method 2)
+# version.regex = __version__ = ['"](.*)['"]
+# version.filename = %(source.dir)s/main.py
+
+# (list) Application requirements
+# comma separated e.g. requirements = sqlite3,kivy
+requirements = python3,kivy==2.0.0,kivymd==0.104.1,sdl2_ttf==2.0.15,pillow
+
+# (str) Custom source folders for requirements
+# Sets custom source for any requirements with recipes
+# requirements.source.kivy = ../../kivy
+
+# (list) Garden requirements
+#garden_requirements =
+
+# (str) Presplash of the application
+#presplash.filename = %(source.dir)s/data/presplash.png
+
+# (str) Icon of the application
+#icon.filename = %(source.dir)s/data/icon.png
+
+# (str) Supported orientation (one of landscape, sensorLandscape, portrait or all)
+orientation = portrait
+
+# (list) List of service to declare
+#services = NAME:ENTRYPOINT_TO_PY,NAME2:ENTRYPOINT2_TO_PY
+
+#
+# OSX Specific
+#
+
+#
+# author = Mariya Sha (https://www.youtube.com/PythonSimplified)
+
+# change the major version of python used by the app
+osx.python_version = 3
+
+# Kivy version to use
+osx.kivy_version = 1.9.1
+
+#
+# Android specific
+#
+
+# (bool) Indicate if the application should be fullscreen or not
+fullscreen = 0
+
+# (string) Presplash background color (for new android toolchain)
+# Supported formats are: #RRGGBB #AARRGGBB or one of the following names:
+# red, blue, green, black, white, gray, cyan, magenta, yellow, lightgray,
+# darkgray, grey, lightgrey, darkgrey, aqua, fuchsia, lime, maroon, navy,
+# olive, purple, silver, teal.
+#android.presplash_color = black
+
+# (list) Permissions
+#android.permissions = INTERNET
+
+# (int) Target Android API, should be as high as possible.
+#android.api = 27
+
+# (int) Minimum API your APK will support.
+#android.minapi = 21
+
+# (int) Android SDK version to use
+#android.sdk = 20
+
+# (str) Android NDK version to use
+#android.ndk = 19b
+
+# (int) Android NDK API to use. This is the minimum API your app will support, it should usually match android.minapi.
+#android.ndk_api = 21
+
+# (bool) Use --private data storage (True) or --dir public storage (False)
+#android.private_storage = True
+
+# (str) Android NDK directory (if empty, it will be automatically downloaded.)
+#android.ndk_path =
+
+# (str) Android SDK directory (if empty, it will be automatically downloaded.)
+#android.sdk_path =
+
+# (str) ANT directory (if empty, it will be automatically downloaded.)
+#android.ant_path =
+
+# (bool) If True, then skip trying to update the Android sdk
+# This can be useful to avoid excess Internet downloads or save time
+# when an update is due and you just want to test/build your package
+# android.skip_update = False
+
+# (bool) If True, then automatically accept SDK license
+# agreements. This is intended for automation only. If set to False,
+# the default, you will be shown the license when first running
+# buildozer.
+# android.accept_sdk_license = False
+
+# (str) Android entry point, default is ok for Kivy-based app
+#android.entrypoint = org.renpy.android.PythonActivity
+
+# (str) Android app theme, default is ok for Kivy-based app
+# android.apptheme = "@android:style/Theme.NoTitleBar"
+
+# (list) Pattern to whitelist for the whole project
+#android.whitelist =
+
+# (str) Path to a custom whitelist file
+#android.whitelist_src =
+
+# (str) Path to a custom blacklist file
+#android.blacklist_src =
+
+# (list) List of Java .jar files to add to the libs so that pyjnius can access
+# their classes. Don't add jars that you do not need, since extra jars can slow
+# down the build process. Allows wildcards matching, for example:
+# OUYA-ODK/libs/*.jar
+#android.add_jars = foo.jar,bar.jar,path/to/more/*.jar
+
+# (list) List of Java files to add to the android project (can be java or a
+# directory containing the files)
+#android.add_src =
+
+# (list) Android AAR archives to add (currently works only with sdl2_gradle
+# bootstrap)
+#android.add_aars =
+
+# (list) Gradle dependencies to add (currently works only with sdl2_gradle
+# bootstrap)
+#android.gradle_dependencies =
+
+# (list) add java compile options
+# this can for example be necessary when importing certain java libraries using the 'android.gradle_dependencies' option
+# see https://developer.android.com/studio/write/java8-support for further information
+# android.add_compile_options = "sourceCompatibility = 1.8", "targetCompatibility = 1.8"
+
+# (list) Gradle repositories to add {can be necessary for some android.gradle_dependencies}
+# please enclose in double quotes
+# e.g. android.gradle_repositories = "maven { url 'https://kotlin.bintray.com/ktor' }"
+#android.add_gradle_repositories =
+
+# (list) packaging options to add
+# see https://google.github.io/android-gradle-dsl/current/com.android.build.gradle.internal.dsl.PackagingOptions.html
+# can be necessary to solve conflicts in gradle_dependencies
+# please enclose in double quotes
+# e.g. android.add_packaging_options = "exclude 'META-INF/common.kotlin_module'", "exclude 'META-INF/*.kotlin_module'"
+#android.add_gradle_repositories =
+
+# (list) Java classes to add as activities to the manifest.
+#android.add_activities = com.example.ExampleActivity
+
+# (str) OUYA Console category. Should be one of GAME or APP
+# If you leave this blank, OUYA support will not be enabled
+#android.ouya.category = GAME
+
+# (str) Filename of OUYA Console icon. It must be a 732x412 png image.
+#android.ouya.icon.filename = %(source.dir)s/data/ouya_icon.png
+
+# (str) XML file to include as an intent filters in <activity> tag
+#android.manifest.intent_filters =
+
+# (str) launchMode to set for the main activity
+#android.manifest.launch_mode = standard
+
+# (list) Android additional libraries to copy into libs/armeabi
+#android.add_libs_armeabi = libs/android/*.so
+#android.add_libs_armeabi_v7a = libs/android-v7/*.so
+#android.add_libs_arm64_v8a = libs/android-v8/*.so
+#android.add_libs_x86 = libs/android-x86/*.so
+#android.add_libs_mips = libs/android-mips/*.so
+
+# (bool) Indicate whether the screen should stay on
+# Don't forget to add the WAKE_LOCK permission if you set this to True
+#android.wakelock = False
+
+# (list) Android application meta-data to set (key=value format)
+#android.meta_data =
+
+# (list) Android library project to add (will be added in the
+# project.properties automatically.)
+#android.library_references =
+
+# (list) Android shared libraries which will be added to AndroidManifest.xml using <uses-library> tag
+#android.uses_library =
+
+# (str) Android logcat filters to use
+#android.logcat_filters = *:S python:D
+
+# (bool) Copy library instead of making a libpymodules.so
+#android.copy_libs = 1
+
+# (str) The Android arch to build for, choices: armeabi-v7a, arm64-v8a, x86, x86_64
+android.arch = armeabi-v7a
+
+# (int) overrides automatic versionCode computation (used in build.gradle)
+# this is not the same as app version and should only be edited if you know what you're doing
+# android.numeric_version = 1
+
+#
+# Python for android (p4a) specific
+#
+
+# (str) python-for-android fork to use, defaults to upstream (kivy)
+p4a.fork = MariyaSha
+
+# (str) python-for-android branch to use, defaults to master
+p4a.branch = develop
+
+# (str) python-for-android git clone directory (if empty, it will be automatically cloned from github)
+#p4a.source_dir =
+
+# (str) The directory in which python-for-android should look for your own build recipes (if any)
+#p4a.local_recipes =
+
+# (str) Filename to the hook for p4a
+#p4a.hook =
+
+# (str) Bootstrap to use for android builds
+# p4a.bootstrap = sdl2
+
+# (int) port number to specify an explicit --port= p4a argument (eg for bootstrap flask)
+#p4a.port =
+
+
+#
+# iOS specific
+#
+
+# (str) Path to a custom kivy-ios folder
+#ios.kivy_ios_dir = ../kivy-ios
+# Alternately, specify the URL and branch of a git checkout:
+ios.kivy_ios_url = https://github.com/kivy/kivy-ios
+ios.kivy_ios_branch = master
+
+# Another platform dependency: ios-deploy
+# Uncomment to use a custom checkout
+#ios.ios_deploy_dir = ../ios_deploy
+# Or specify URL and branch
+ios.ios_deploy_url = https://github.com/phonegap/ios-deploy
+ios.ios_deploy_branch = 1.7.0
+
+# (str) Name of the certificate to use for signing the debug version
+# Get a list of available identities: buildozer ios list_identities
+#ios.codesign.debug = "iPhone Developer: <lastname> <firstname> (<hexstring>)"
+
+# (str) Name of the certificate to use for signing the release version
+#ios.codesign.release = %(ios.codesign.debug)s
+
+
+[buildozer]
+
+# (int) Log level (0 = error only, 1 = info, 2 = debug (with command output))
+log_level = 2
+
+# (int) Display warning if buildozer is run as root (0 = False, 1 = True)
+warn_on_root = 1
+
+# (str) Path to build artifact storage, absolute or relative to spec file
+# build_dir = ./.buildozer
+
+# (str) Path to build output (i.e. .apk, .ipa) storage
+# bin_dir = ./bin
+
+#    -----------------------------------------------------------------------------
+#    List as sections
+#
+#    You can define all the "list" as [section:key].
+#    Each line will be considered as a option to the list.
+#    Let's take [app] / source.exclude_patterns.
+#    Instead of doing:
+#
+#[app]
+#source.exclude_patterns = license,data/audio/*.wav,data/images/original/*
+#
+#    This can be translated into:
+#
+#[app:source.exclude_patterns]
+#license
+#data/audio/*.wav
+#data/images/original/*
+#
+
+
+#    -----------------------------------------------------------------------------
+#    Profiles
+#
+#    You can extend section / key with a profile
+#    For example, you want to deploy a demo version of your application without
+#    HD content. You could first change the title to add "(demo)" in the name
+#    and extend the excluded directories to remove the HD content.
+#
+#[app@demo]
+#title = My Application (demo)
+#
+#[app:source.exclude_patterns@demo]
+#images/hd/*
+#
+#    Then, invoke the command line with the "demo" profile:
+#
+#buildozer --profile demo android debug
diff --git a/Android_PreBuild/logo.png b/Android_PreBuild/logo.png
new file mode 100644
index 0000000..71094ae
Binary files /dev/null and b/Android_PreBuild/logo.png differ
diff --git a/Android_PreBuild/main.py b/Android_PreBuild/main.py
new file mode 100644
index 0000000..10f3041
--- /dev/null
+++ b/Android_PreBuild/main.py
@@ -0,0 +1,140 @@
+import kivy
+kivy.require('2.0.0')
+import kivymd
+
+from kivymd.uix.screen import MDScreen
+from kivymd.app import MDApp
+from kivy.uix.image import Image
+from kivymd.uix.button import MDFillRoundFlatIconButton, MDFillRoundFlatButton
+from kivymd.uix.textfield import MDTextField
+from kivymd.uix.label import MDLabel
+from kivymd.uix.toolbar import MDToolbar
+
+class ConverterApp(MDApp):
+
+    def flip(self):
+        # hide labels until needed
+        self.converted.text = ""
+        self.label.text = ""
+        self.input.text = ""
+        # a method for the "flip" icon
+        # changes the state of the app
+        if self.state == 0:
+            self.state = 1
+            self.toolbar.title = "Decimal to Binary"
+            self.input.hint_text = "enter a decimal number"
+        else:
+            self.state = 0
+            self.toolbar.title = "Binary to Decimal"
+            self.input.hint_text = "enter a binary number"
+
+    def convert(self, args):
+        # a method to find the decimal/binary equivallent
+        try:
+            if "." not in self.input.text:
+                # if the user-provided number is not a fraction
+                if self.state == 0:
+                    # binary to decimal
+                    val = str(int(self.input.text,2))
+                    self.label.text = "in decimal is:"
+                else:
+                    # decimal to binary
+                    val = bin(int(self.input.text))[2:]
+                    self.label.text = "in binary is:"
+                self.converted.text = val
+            else:
+                #if the user provided number is a fraction
+                whole, fract = self.input.text.split(".")
+
+                if self.state == 0:
+                    #convert binary to decimal
+                    whole = int(whole, 2)
+                    floating = 0
+                    for idx, digit in enumerate(fract):
+                        floating += int(digit)*2**(-(idx+1))
+                    self.label.text = "in decimal is:"
+                    self.converted.text = str(whole + floating)
+                else:
+                    #convert decimal to binary
+                    decimal_places = 10
+                    whole = bin(int(whole))[2:]
+                    fract = float("0."+fract)
+                    floating = []
+                    for i in range(decimal_places):
+                        if fract*2 < 1:
+                            floating.append("0")
+                            fract *= 2
+                        elif fract*2 > 1:
+                            floating.append("1")
+                            fract = fract*2 - 1
+                        elif fract*2 == 1.0:
+                            floating.append("1")
+                            break
+                    self.label.text = "in binary is:"
+                    self.converted.text = whole + "." + "".join(floating)
+        except ValueError:
+            #if the user-provided value is invalid
+            self.converted.text = ""
+            if self.state == 0:
+                #binary to decimal
+                self.label.text = "please enter a valid binary number"
+
+            else:
+                #decimal to binary
+                self.label.text = "please enter a valid decimal number"
+
+    def build(self):
+        self.state = 0 #initial state
+        self.theme_cls.primary_palette = "Blue"
+        screen = MDScreen()
+
+        # top toolbar
+        self.toolbar = MDToolbar(title="Binary to Decimal")
+        self.toolbar.pos_hint = {"top": 1}
+        self.toolbar.right_action_items = [
+            ["rotate-3d-variant", lambda x: self.flip()]]
+        screen.add_widget(self.toolbar)
+
+        # logo
+        screen.add_widget(Image(
+            source="logo.png",
+            pos_hint = {"center_x": 0.5, "center_y":0.7}
+            ))
+
+        #collect user input
+        self.input = MDTextField(
+            size_hint = (0.8,1),
+            pos_hint = {"center_x": 0.5, "center_y":0.5},
+            on_text_validate = self.convert
+        )
+        self.input.hint_text ="enter a binary number"
+        screen.add_widget(self.input)
+
+        #secondary + primary labels
+        self.label = MDLabel(
+            halign="center",
+            pos_hint = {"center_x": 0.5, "center_y":0.35},
+            theme_text_color = "Secondary"
+        )
+
+        self.converted = MDLabel(
+            halign="center",
+            pos_hint = {"center_x": 0.5, "center_y":0.3},
+            theme_text_color = "Primary",
+            font_style = "H5"
+        )
+        screen.add_widget(self.label)
+        screen.add_widget(self.converted)
+
+        # "CONVERT" button
+        screen.add_widget(MDFillRoundFlatButton(
+            text="    CONVERT    ",
+            font_size = 25,
+            pos_hint = {"center_x": 0.5, "center_y":0.15},
+            on_press = self.convert
+        ))
+
+        return screen
+
+if __name__ == '__main__':
+    ConverterApp().run()