diff --git a/.github/workflows/build-apk.yml b/.github/workflows/build-apk.yml
new file mode 100644
index 0000000..354617f
--- /dev/null
+++ b/.github/workflows/build-apk.yml
@@ -0,0 +1,108 @@
+name: Build Android APK
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+    inputs:
+      version_name:
+        description: '版本名称 (例如 1.0.0)'
+        required: false
+        default: '1.0.0'
+
+jobs:
+  build:
+    name: Build Release APK
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+
+      - name: Sync Web Assets to Android
+        run: |
+          chmod +x android/copy-web-assets.sh
+          ./android/copy-web-assets.sh
+
+      - name: Setup Keystore
+        id: sign_setup
+        run: |
+          mkdir -p android/keystore
+          KEYSTORE_PATH="$GITHUB_WORKSPACE/android/keystore/release.jks"
+          
+          if [ -n "${{ secrets.SIGNING_KEY }}" ]; then
+            echo "Using custom signing key from repository secrets..."
+            echo "${{ secrets.SIGNING_KEY }}" | base64 --decode > "$KEYSTORE_PATH"
+            echo "SIGNING_KEY_FILE=$KEYSTORE_PATH" >> $GITHUB_ENV
+            echo "KEY_STORE_PASSWORD=${{ secrets.KEY_STORE_PASSWORD }}" >> $GITHUB_ENV
+            echo "ALIAS=${{ secrets.ALIAS }}" >> $GITHUB_ENV
+            echo "KEY_PASSWORD=${{ secrets.KEY_PASSWORD }}" >> $GITHUB_ENV
+          else
+            echo "No custom signing key provided. Generating self-signed release keystore for this build..."
+            keytool -genkeypair -v \
+              -keystore "$KEYSTORE_PATH" \
+              -alias "workhours" \
+              -keyalg RSA \
+              -keysize 2048 \
+              -validity 10000 \
+              -storepass "workhours123" \
+              -keypass "workhours123" \
+              -dname "CN=WorkHours, OU=OpenClaw, O=WorkHoursTracker, L=Wuhan, ST=Hubei, C=CN"
+            echo "SIGNING_KEY_FILE=$KEYSTORE_PATH" >> $GITHUB_ENV
+            echo "KEY_STORE_PASSWORD=workhours123" >> $GITHUB_ENV
+            echo "ALIAS=workhours" >> $GITHUB_ENV
+            echo "KEY_PASSWORD=workhours123" >> $GITHUB_ENV
+          fi
+
+      - name: Build with Gradle
+        run: |
+          cd android
+          chmod +x gradlew
+          ./gradlew assembleRelease --stacktrace
+
+      - name: Prepare APK Artifact
+        id: prepare_apk
+        run: |
+          VERSION="${{ github.event.inputs.version_name || github.ref_name || '1.0.0' }}"
+          VERSION="${VERSION#v}" # 剥离前缀 v
+          
+          OUTPUT_DIR="android/app/build/outputs/apk/release"
+          APK_FILE=$(find "$OUTPUT_DIR" -name "*.apk" | head -n 1)
+          
+          if [ -z "$APK_FILE" ]; then
+            echo "Error: APK not found!"
+            exit 1
+          fi
+          
+          TARGET_APK="work-hours-tracker-v${VERSION}.apk"
+          cp "$APK_FILE" "$TARGET_APK"
+          echo "Built APK: $TARGET_APK"
+          echo "apk_path=$TARGET_APK" >> $GITHUB_OUTPUT
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+
+      - name: Upload APK to Artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: work-hours-tracker-${{ steps.prepare_apk.outputs.version }}
+          path: ${{ steps.prepare_apk.outputs.apk_path }}
+          retention-days: 30
+
+      - name: Create GitHub Release
+        if: startsWith(github.ref, 'refs/tags/v')
+        uses: softprops/action-gh-release@v2
+        with:
+          files: ${{ steps.prepare_apk.outputs.apk_path }}
+          name: Work Hours Tracker v${{ steps.prepare_apk.outputs.version }}
+          draft: false
+          prerelease: false
+          generate_release_notes: true
diff --git a/.gitignore b/.gitignore
index 3cd4fc8..65b20a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,6 +24,18 @@ server/data/*.log
 # ── 回收站 ──────────────────────────────────────────────────
 .trash/
 
+# ── Android 工程构建生成物 ────────────────────────────────────
+android/.gradle/
+android/build/
+android/app/build/
+android/local.properties
+android/*.jks
+android/*.keystore
+android/keystore/
+android/app/src/main/assets/www/*
+!android/app/src/main/assets/www/.gitkeep
+
 # ── 杂项 ────────────────────────────────────────────────────
 .DS_Store
 *.tmp
+*.apk
diff --git a/android/app/build.gradle b/android/app/build.gradle
new file mode 100644
index 0000000..69f59e4
--- /dev/null
+++ b/android/app/build.gradle
@@ -0,0 +1,51 @@
+plugins {
+    id 'com.android.application'
+}
+
+android {
+    namespace 'top.ouaone.workhours'
+    compileSdk 34
+
+    defaultConfig {
+        applicationId "top.ouaone.workhours"
+        minSdk 23
+        targetSdk 34
+        versionCode 1
+        versionName "1.0.0"
+    }
+
+    signingConfigs {
+        release {
+            def keyFilePath = System.getenv("SIGNING_KEY_FILE")
+            if (keyFilePath && file(keyFilePath).exists()) {
+                storeFile file(keyFilePath)
+                storePassword System.getenv("KEY_STORE_PASSWORD") ?: "workhours123"
+                keyAlias System.getenv("ALIAS") ?: "workhours"
+                keyPassword System.getenv("KEY_PASSWORD") ?: "workhours123"
+            }
+        }
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+            def keyFilePath = System.getenv("SIGNING_KEY_FILE")
+            if (keyFilePath && file(keyFilePath).exists()) {
+                signingConfig signingConfigs.release
+            } else {
+                signingConfig signingConfigs.debug
+            }
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+    }
+}
+
+dependencies {
+    implementation 'androidx.appcompat:appcompat:1.6.1'
+    implementation 'androidx.activity:activity:1.8.2'
+}
diff --git a/android/app/proguard-rules.pro b/android/app/proguard-rules.pro
new file mode 100644
index 0000000..4deb83d
--- /dev/null
+++ b/android/app/proguard-rules.pro
@@ -0,0 +1,5 @@
+# ProGuard rules for Work Hours Tracker
+-keepattributes JavascriptInterface
+-keepclassmembers class * {
+    @android.webkit.JavascriptInterface <methods>;
+}
diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..ad91fb6
--- /dev/null
+++ b/android/app/src/main/AndroidManifest.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.VIBRATE" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.WorkHours"
+        android:usesCleartextTraffic="true"
+        tools:targetApi="31">
+
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:configChanges="orientation|screenSize|keyboardHidden"
+            android:windowSoftInputMode="adjustResize">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>
diff --git a/android/app/src/main/java/top/ouaone/workhours/MainActivity.java b/android/app/src/main/java/top/ouaone/workhours/MainActivity.java
new file mode 100644
index 0000000..f1eaea1
--- /dev/null
+++ b/android/app/src/main/java/top/ouaone/workhours/MainActivity.java
@@ -0,0 +1,149 @@
+package top.ouaone.workhours;
+
+import android.annotation.SuppressLint;
+import android.content.Intent;
+import android.graphics.Color;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.view.View;
+import android.webkit.ConsoleMessage;
+import android.webkit.WebChromeClient;
+import android.webkit.WebResourceRequest;
+import android.webkit.WebSettings;
+import android.webkit.WebView;
+import android.webkit.WebViewClient;
+import android.widget.Toast;
+
+import androidx.activity.OnBackPressedCallback;
+import androidx.appcompat.app.AppCompatActivity;
+
+public class MainActivity extends AppCompatActivity {
+
+    private WebView webView;
+    private long lastBackPressTime = 0;
+    private static final long BACK_PRESS_INTERVAL = 2000; // 2秒双击防误退
+
+    @SuppressLint("SetJavaScriptEnabled")
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // 设置状态栏与导航栏外观
+        setupSystemBars();
+
+        webView = new WebView(this);
+        webView.setBackgroundColor(Color.parseColor("#1E293B"));
+        setContentView(webView);
+
+        configureWebSettings();
+        setupClients();
+        setupBackNavigation();
+
+        // 加载打包在 assets 中的离线应用
+        webView.loadUrl("file:///android_asset/www/index.html");
+    }
+
+    private void setupSystemBars() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            getWindow().setStatusBarColor(Color.parseColor("#1E293B"));
+            getWindow().setNavigationBarColor(Color.parseColor("#F8FAFC"));
+        }
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            View decor = getWindow().getDecorView();
+            int flags = decor.getSystemUiVisibility();
+            flags |= View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR; // 浅色导航栏图标
+            decor.setSystemUiVisibility(flags);
+        }
+    }
+
+    @SuppressLint("SetJavaScriptEnabled")
+    private void configureWebSettings() {
+        WebSettings s = webView.getSettings();
+        s.setJavaScriptEnabled(true);
+        s.setDomStorageEnabled(true);
+        s.setDatabaseEnabled(true);
+        s.setAllowFileAccess(true);
+        s.setAllowContentAccess(true);
+        s.setAllowFileAccessFromFileURLs(true);
+        s.setAllowUniversalAccessFromFileURLs(true);
+        s.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
+        s.setUseWideViewPort(true);
+        s.setLoadWithOverviewMode(true);
+        s.setSupportZoom(false);
+        s.setDisplayZoomControls(false);
+        s.setCacheMode(WebSettings.LOAD_DEFAULT);
+    }
+
+    private void setupClients() {
+        webView.setWebViewClient(new WebViewClient() {
+            @Override
+            public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
+                Uri uri = request.getUrl();
+                String scheme = uri.getScheme();
+                if ("http".equalsIgnoreCase(scheme) || "https".equalsIgnoreCase(scheme)) {
+                    // 仅当点击外部链接且不是同步 API 时调用系统浏览器
+                    String url = uri.toString();
+                    if (!url.contains("/api/")) {
+                        try {
+                            Intent intent = new Intent(Intent.ACTION_VIEW, uri);
+                            startActivity(intent);
+                            return true;
+                        } catch (Exception ignored) {
+                        }
+                    }
+                }
+                return false;
+            }
+        });
+
+        webView.setWebChromeClient(new WebChromeClient() {
+            @Override
+            public boolean onConsoleMessage(ConsoleMessage cm) {
+                // 控制台日志过滤输出到 Logcat
+                android.util.Log.d("WorkHoursWebView", cm.message() + " -- From line "
+                        + cm.lineNumber() + " of " + cm.sourceId());
+                return true;
+            }
+        });
+    }
+
+    private void setupBackNavigation() {
+        getOnBackPressedDispatcher().addCallback(this, new OnBackPressedCallback(true) {
+            @Override
+            public void handleOnBackPressed() {
+                long now = System.currentTimeMillis();
+                if (now - lastBackPressTime < BACK_PRESS_INTERVAL) {
+                    finish();
+                } else {
+                    lastBackPressTime = now;
+                    Toast.makeText(MainActivity.this, "再按一次退出工时记账", Toast.LENGTH_SHORT).show();
+                }
+            }
+        });
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        if (webView != null) {
+            webView.onResume();
+        }
+    }
+
+    @Override
+    protected void onPause() {
+        if (webView != null) {
+            webView.onPause();
+        }
+        super.onPause();
+    }
+
+    @Override
+    protected void onDestroy() {
+        if (webView != null) {
+            webView.destroy();
+        }
+        super.onDestroy();
+    }
+}
diff --git a/android/app/src/main/res/mipmap-hdpi/ic_launcher.png b/android/app/src/main/res/mipmap-hdpi/ic_launcher.png
new file mode 100644
index 0000000..e2752d9
Binary files /dev/null and b/android/app/src/main/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/android/app/src/main/res/mipmap-hdpi/ic_launcher_round.png b/android/app/src/main/res/mipmap-hdpi/ic_launcher_round.png
new file mode 100644
index 0000000..e2752d9
Binary files /dev/null and b/android/app/src/main/res/mipmap-hdpi/ic_launcher_round.png differ
diff --git a/android/app/src/main/res/mipmap-mdpi/ic_launcher.png b/android/app/src/main/res/mipmap-mdpi/ic_launcher.png
new file mode 100644
index 0000000..d15b12f
Binary files /dev/null and b/android/app/src/main/res/mipmap-mdpi/ic_launcher.png differ
diff --git a/android/app/src/main/res/mipmap-mdpi/ic_launcher_round.png b/android/app/src/main/res/mipmap-mdpi/ic_launcher_round.png
new file mode 100644
index 0000000..d15b12f
Binary files /dev/null and b/android/app/src/main/res/mipmap-mdpi/ic_launcher_round.png differ
diff --git a/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png b/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
new file mode 100644
index 0000000..47cf6ce
Binary files /dev/null and b/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/android/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png b/android/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
new file mode 100644
index 0000000..47cf6ce
Binary files /dev/null and b/android/app/src/main/res/mipmap-xhdpi/ic_launcher_round.png differ
diff --git a/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100644
index 0000000..bb8066b
Binary files /dev/null and b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/android/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
new file mode 100644
index 0000000..bb8066b
Binary files /dev/null and b/android/app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png differ
diff --git a/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100644
index 0000000..de55ad9
Binary files /dev/null and b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png differ
diff --git a/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
new file mode 100644
index 0000000..de55ad9
Binary files /dev/null and b/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png differ
diff --git a/android/app/src/main/res/values/colors.xml b/android/app/src/main/res/values/colors.xml
new file mode 100644
index 0000000..92d4657
--- /dev/null
+++ b/android/app/src/main/res/values/colors.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="primary">#4F46E5</color>
+    <color name="status_bar_color">#1E293B</color>
+    <color name="nav_bar_color">#F8FAFC</color>
+    <color name="window_background">#1E293B</color>
+</resources>
diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml
new file mode 100644
index 0000000..e339a42
--- /dev/null
+++ b/android/app/src/main/res/values/strings.xml
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">工时记账</string>
+</resources>
diff --git a/android/app/src/main/res/values/styles.xml b/android/app/src/main/res/values/styles.xml
new file mode 100644
index 0000000..62a586f
--- /dev/null
+++ b/android/app/src/main/res/values/styles.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.WorkHours" parent="Theme.AppCompat.DayNight.NoActionBar">
+        <item name="android:statusBarColor">@color/status_bar_color</item>
+        <item name="android:navigationBarColor">@color/nav_bar_color</item>
+        <item name="android:windowBackground">@color/window_background</item>
+        <item name="android:windowLightStatusBar">false</item>
+        <item name="android:windowLightNavigationBar">true</item>
+    </style>
+</resources>
diff --git a/android/build.gradle b/android/build.gradle
new file mode 100644
index 0000000..df4514e
--- /dev/null
+++ b/android/build.gradle
@@ -0,0 +1,20 @@
+buildscript {
+    repositories {
+        google()
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:8.2.2'
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}
diff --git a/android/copy-web-assets.sh b/android/copy-web-assets.sh
new file mode 100755
index 0000000..a117d9c
--- /dev/null
+++ b/android/copy-web-assets.sh
@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# 获取工程根目录（本脚本位于 android/ 目录下）
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ROOT_DIR="$(cd "${SCRIPT_DIR}/.." && pwd)"
+TARGET_DIR="${SCRIPT_DIR}/app/src/main/assets/www"
+
+echo "==> 准备同步 Web 静态资产到 Android assets: ${TARGET_DIR}"
+
+rm -rf "${TARGET_DIR}"
+mkdir -p "${TARGET_DIR}"
+
+# 复制核心前端文件与资源（Web 端纯净不改动，隔离复制）
+cp "${ROOT_DIR}/index.html" "${TARGET_DIR}/"
+cp "${ROOT_DIR}/sync.js" "${TARGET_DIR}/"
+cp "${ROOT_DIR}/manifest.webmanifest" "${TARGET_DIR}/"
+
+cp -r "${ROOT_DIR}/shared" "${TARGET_DIR}/"
+cp -r "${ROOT_DIR}/vendor" "${TARGET_DIR}/"
+cp -r "${ROOT_DIR}/icons" "${TARGET_DIR}/"
+
+echo "==> Web 静态资源复制完成："
+ls -lh "${TARGET_DIR}"
diff --git a/android/gradle/wrapper/gradle-wrapper.jar b/android/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..f6b961f
Binary files /dev/null and b/android/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/android/gradle/wrapper/gradle-wrapper.properties b/android/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..3fa8f86
--- /dev/null
+++ b/android/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/android/gradlew b/android/gradlew
new file mode 100755
index 0000000..cccdd3d
--- /dev/null
+++ b/android/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/android/gradlew.bat b/android/gradlew.bat
new file mode 100644
index 0000000..f955316
--- /dev/null
+++ b/android/gradlew.bat
@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/android/settings.gradle b/android/settings.gradle
new file mode 100644
index 0000000..920e67e
--- /dev/null
+++ b/android/settings.gradle
@@ -0,0 +1,17 @@
+pluginManagement {
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.name = "WorkHoursTracker"
+include ':app'