diff --git a/android/src/cpp/main.cpp b/android/src/cpp/main.cpp
index 0e33f1a0..e2745bd1 100644
--- a/android/src/cpp/main.cpp
+++ b/android/src/cpp/main.cpp
@@ -276,7 +276,7 @@ JNIEXPORT void JNICALL Java_com_omixlab_panopainter_MainActivity_pickExternalCal
     App::I->data_path = file_path;
     App::I->work_path = file_path;
     App::I->rec_path = file_path + "/frames";
-    pp::platform::legacy::set_legacy_storage_paths({
+    pp::platform::legacy::set_legacy_android_storage_paths({
         App::I->data_path,
         App::I->work_path,
         App::I->rec_path,
@@ -716,7 +716,7 @@ static int engine_init_display(struct engine* engine) {
     if (App::I->data_path.empty() || App::I->data_path == ".")
         App::I->data_path = get_data_path();
     LOG("data_path %s", App::I->data_path.c_str());
-    pp::platform::legacy::set_legacy_storage_paths({
+    pp::platform::legacy::set_legacy_android_storage_paths({
         App::I->data_path,
         App::I->work_path.empty() ? App::I->data_path : App::I->work_path,
         App::I->rec_path,
diff --git a/docs/modernization/roadmap.md b/docs/modernization/roadmap.md
index af13cad7..d7aa115a 100644
--- a/docs/modernization/roadmap.md
+++ b/docs/modernization/roadmap.md
@@ -70,6 +70,16 @@ What is already real:
 - `pp_app_core`
 
 Latest slice:
+- `src/platform_legacy/legacy_platform_services.cpp` now reads Android storage
+  paths from Android-owned retained state instead of the shared legacy
+  storage-path singleton.
+- `src/legacy_app_startup_services.cpp` and `android/src/cpp/main.cpp` now
+  update Android-owned retained storage paths instead of the shared legacy
+  storage-path singleton.
+- `src/app_events.cpp`, `linux/src/main.cpp`, and
+  `src/platform_legacy/legacy_platform_state.*` now route the Linux FPS-title
+  callback through a narrow legacy GLFW title helper instead of reaching into
+  retained GLFW window state from `App::set_platform_services(...)`.
 - `src/platform_apple/apple_platform_state.cpp` no longer reads Apple storage
   paths from `pp::platform::legacy::active_legacy_storage_paths()`;
   Apple-owned retained state now carries that path bundle.
diff --git a/docs/modernization/tasks.md b/docs/modernization/tasks.md
index 8a89912e..af3ab825 100644
--- a/docs/modernization/tasks.md
+++ b/docs/modernization/tasks.md
@@ -78,6 +78,15 @@ Completed, blocked, and superseded task history moved to
   the queue is now ordered by code movement instead.
 
 Current slice:
+- `src/platform_legacy/legacy_platform_services.cpp` plus
+  `src/platform_legacy/legacy_platform_state.*` now give Android its own
+  retained storage-path surface instead of reading the shared legacy singleton.
+- `src/legacy_app_startup_services.cpp` and `android/src/cpp/main.cpp` now
+  write Android-owned retained storage paths.
+- `src/app_events.cpp`, `linux/src/main.cpp`, and
+  `src/platform_legacy/legacy_platform_state.*` now use a narrow GLFW title
+  helper for Linux FPS-title updates instead of direct retained-window access
+  in the app event layer.
 - `src/platform_apple/apple_platform_state.cpp` now reads Apple storage paths
   from Apple-owned retained state rather than the shared legacy storage-path
   singleton.
diff --git a/linux/src/main.cpp b/linux/src/main.cpp
index 790b5739..d9e15c35 100644
--- a/linux/src/main.cpp
+++ b/linux/src/main.cpp
@@ -39,15 +39,6 @@ std::string linux_home_path()
     return pw->pw_dir;
 }
 
-void linux_update_fps(int frames)
-{
-    static char title_fps[512];
-    sprintf(title_fps, "PanoPainter - %d fps", frames);
-    auto* const window = pp::platform::legacy::active_legacy_glfw_window_state().window;
-    if (window)
-        glfwSetWindowTitle(window, title_fps);
-}
-
 void error_log(int code, const char * s)
 {
     printf("glfw error: %s", s);
diff --git a/src/app_events.cpp b/src/app_events.cpp
index ac186946..95a3e841 100644
--- a/src/app_events.cpp
+++ b/src/app_events.cpp
@@ -9,7 +9,6 @@
 #include <functional>
 
 #ifdef __LINUX__
-#include <GLFW/glfw3.h>
 #include "platform_linux/linux_platform_services.h"
 #endif
 #ifdef _WIN32
@@ -62,12 +61,8 @@ void App::set_platform_services(pp::platform::PlatformServices* services) noexce
 #ifdef __LINUX__
     if (services)
     {
-        pp::platform::linux_desktop::set_fps_title_callback([this](std::string title) {
-            auto* const window = pp::platform::legacy::active_legacy_glfw_window_state().window;
-            if (!window)
-                return;
-
-            glfwSetWindowTitle(window, title.c_str());
+        pp::platform::linux_desktop::set_fps_title_callback([](std::string title) {
+            pp::platform::legacy::set_legacy_glfw_window_title(title);
         });
     }
     else
diff --git a/src/legacy_app_startup_services.cpp b/src/legacy_app_startup_services.cpp
index 37909d8b..974213c5 100644
--- a/src/legacy_app_startup_services.cpp
+++ b/src/legacy_app_startup_services.cpp
@@ -135,12 +135,21 @@ void execute_legacy_app_init_log(App& app)
 
     // TODO: save this path somewhere in the settings, don't overwrite every start
     app.work_path = paths.work_path.empty() ? app.data_path : paths.work_path;
+#ifdef __ANDROID__
+    pp::platform::legacy::set_legacy_android_storage_paths({
+        app.data_path,
+        app.work_path,
+        app.rec_path,
+        app.tmp_path,
+    });
+#else
     pp::platform::legacy::set_legacy_storage_paths({
         app.data_path,
         app.work_path,
         app.rec_path,
         app.tmp_path,
     });
+#endif
 
     //LogRemote::I.start();
     LogRemote::I.file_init();
diff --git a/src/platform_legacy/legacy_platform_services.cpp b/src/platform_legacy/legacy_platform_services.cpp
index 81fe9461..581a65b6 100644
--- a/src/platform_legacy/legacy_platform_services.cpp
+++ b/src/platform_legacy/legacy_platform_services.cpp
@@ -83,6 +83,8 @@ public:
             data_path + "/frames",
             {},
         };
+#elif defined(__ANDROID__)
+        return pp::platform::legacy::active_legacy_android_storage_paths();
 #else
         return pp::platform::legacy::active_legacy_storage_paths();
 #endif
diff --git a/src/platform_legacy/legacy_platform_state.cpp b/src/platform_legacy/legacy_platform_state.cpp
index 78f24ca4..fbd859a9 100644
--- a/src/platform_legacy/legacy_platform_state.cpp
+++ b/src/platform_legacy/legacy_platform_state.cpp
@@ -19,6 +19,12 @@ struct RetainedLegacyStoragePaths final {
     pp::platform::PlatformStoragePaths storage_paths;
 };
 
+#ifdef __ANDROID__
+struct RetainedLegacyAndroidStoragePaths final {
+    pp::platform::PlatformStoragePaths storage_paths;
+};
+#endif
+
 struct RetainedLegacyWebPlatformServicesBinding final {
     pp::platform::WebPlatformServices* services = nullptr;
 };
@@ -29,6 +35,14 @@ struct RetainedLegacyWebPlatformServicesBinding final {
     return state;
 }
 
+#ifdef __ANDROID__
+[[nodiscard]] RetainedLegacyAndroidStoragePaths& retained_legacy_android_storage_paths()
+{
+    static RetainedLegacyAndroidStoragePaths state;
+    return state;
+}
+#endif
+
 [[nodiscard]] RetainedLegacyWebPlatformServicesBinding& retained_legacy_web_platform_services_binding()
 {
     static RetainedLegacyWebPlatformServicesBinding state;
@@ -86,6 +100,16 @@ void set_legacy_glfw_window(GLFWwindow* window)
     active_legacy_glfw_window_state().window = window;
 }
 
+void set_legacy_glfw_window_title(std::string_view title)
+{
+    auto* const window = active_legacy_glfw_window_state().window;
+    if (!window)
+        return;
+
+    const std::string title_value(title);
+    glfwSetWindowTitle(window, title_value.c_str());
+}
+
 void acquire_legacy_glfw_render_context()
 {
     glfwMakeContextCurrent(active_legacy_glfw_window_state().window);
@@ -206,4 +230,16 @@ void set_legacy_storage_paths(pp::platform::PlatformStoragePaths paths)
     retained_legacy_storage_paths().storage_paths = std::move(paths);
 }
 
+#ifdef __ANDROID__
+[[nodiscard]] const pp::platform::PlatformStoragePaths& active_legacy_android_storage_paths()
+{
+    return retained_legacy_android_storage_paths().storage_paths;
+}
+
+void set_legacy_android_storage_paths(pp::platform::PlatformStoragePaths paths)
+{
+    retained_legacy_android_storage_paths().storage_paths = std::move(paths);
+}
+#endif
+
 }
diff --git a/src/platform_legacy/legacy_platform_state.h b/src/platform_legacy/legacy_platform_state.h
index ef93ada7..ed57113b 100644
--- a/src/platform_legacy/legacy_platform_state.h
+++ b/src/platform_legacy/legacy_platform_state.h
@@ -18,6 +18,7 @@ struct RetainedLegacyGlfwWindowState final {
 
 [[nodiscard]] RetainedLegacyGlfwWindowState& active_legacy_glfw_window_state();
 void set_legacy_glfw_window(GLFWwindow* window);
+void set_legacy_glfw_window_title(std::string_view title);
 void acquire_legacy_glfw_render_context();
 void present_legacy_glfw_render_context();
 void request_legacy_glfw_app_close();
@@ -51,4 +52,9 @@ void save_legacy_web_prepared_file(
 [[nodiscard]] const pp::platform::PlatformStoragePaths& active_legacy_storage_paths();
 void set_legacy_storage_paths(pp::platform::PlatformStoragePaths paths);
 
+#ifdef __ANDROID__
+[[nodiscard]] const pp::platform::PlatformStoragePaths& active_legacy_android_storage_paths();
+void set_legacy_android_storage_paths(pp::platform::PlatformStoragePaths paths);
+#endif
+
 }