diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index ef5beb7..4bff20e 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -1,6 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <application
-        android:label="mobile"
+        android:label="@string/app_name"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <activity
diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml
new file mode 100644
index 0000000..894f5b5
--- /dev/null
+++ b/android/app/src/main/res/values/strings.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name">KiriMemo</string>
+</resources>
diff --git a/ios/Runner/Info.plist b/ios/Runner/Info.plist
index a821fdb..076a937 100644
--- a/ios/Runner/Info.plist
+++ b/ios/Runner/Info.plist
@@ -7,7 +7,7 @@
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleDisplayName</key>
-	<string>Mobile</string>
+	<string>KiriMemo</string>
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIdentifier</key>
@@ -15,7 +15,7 @@
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>
-	<string>mobile</string>
+	<string>KiriMemo</string>
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
diff --git a/linux/CMakeLists.txt b/linux/CMakeLists.txt
index ee0ab5c..109105f 100644
--- a/linux/CMakeLists.txt
+++ b/linux/CMakeLists.txt
@@ -8,6 +8,10 @@ set(BINARY_NAME "mobile")
 # The unique GTK application identifier for this application. See:
 # https://wiki.gnome.org/HowDoI/ChooseApplicationID
 set(APPLICATION_ID "cn.saltworks.kirimemo.mobile")
+# Human-readable application name, shown in the window title bar.
+# Keep it in sync with the Android `app_name` string resource and the
+# `CFBundleDisplayName` / `CFBundleName` entries in ios/Runner/Info.plist.
+set(APPLICATION_TITLE "KiriMemo")
 
 # Explicitly opt in to modern CMake behaviors to avoid warnings with recent
 # versions of CMake.
diff --git a/linux/runner/CMakeLists.txt b/linux/runner/CMakeLists.txt
index e97dabc..236f08d 100644
--- a/linux/runner/CMakeLists.txt
+++ b/linux/runner/CMakeLists.txt
@@ -16,8 +16,10 @@ add_executable(${BINARY_NAME}
 # that need different build settings.
 apply_standard_settings(${BINARY_NAME})
 
-# Add preprocessor definitions for the application ID.
+# Add preprocessor definitions for the application ID and title. The values come
+# from the top-level CMakeLists.txt so they are not duplicated in C++ sources.
 add_definitions(-DAPPLICATION_ID="${APPLICATION_ID}")
+add_definitions(-DAPPLICATION_TITLE="${APPLICATION_TITLE}")
 
 # Add dependency libraries. Add any application-specific dependencies here.
 target_link_libraries(${BINARY_NAME} PRIVATE flutter)
diff --git a/linux/runner/my_application.cc b/linux/runner/my_application.cc
index 2d2b91d..abb52a4 100644
--- a/linux/runner/my_application.cc
+++ b/linux/runner/my_application.cc
@@ -31,7 +31,10 @@ static void my_application_activate(GApplication* application) {
   // out of place and noticeably thicker than the native title bar. Relying on
   // the compositor gives the native Breeze/KWin decoration on Plasma, and the
   // desktop's own title bar everywhere else.
-  gtk_window_set_title(window, "KiriMemo");
+  // The title comes from APPLICATION_TITLE in linux/CMakeLists.txt (passed as a
+  // preprocessor definition by linux/runner/CMakeLists.txt), so the name lives
+  // in the project configuration instead of being duplicated here.
+  gtk_window_set_title(window, APPLICATION_TITLE);
 
   gtk_window_set_default_size(window, 1280, 720);