diff --git a/frontend/src/assets/main.css b/frontend/src/assets/main.css
index b9608c2..c490e5f 100644
--- a/frontend/src/assets/main.css
+++ b/frontend/src/assets/main.css
@@ -845,7 +845,9 @@ button {
 }
 .phone-dynamic-island-enter-active,
 .phone-dynamic-island-leave-active {
-  transition: opacity 180ms ease, transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
+  transition:
+    opacity 180ms ease,
+    transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
 }
 .phone-dynamic-island-enter-from,
 .phone-dynamic-island-leave-to {
@@ -3544,6 +3546,11 @@ button {
   backface-visibility: hidden;
   will-change: transform, border-radius, opacity;
 }
+.app-window--citywarn {
+  backface-visibility: visible;
+  filter: none;
+  will-change: auto;
+}
 .app-window-enter-active {
   transition:
     transform 0.46s cubic-bezier(0.32, 0.72, 0, 1),
diff --git a/frontend/src/views/PhoneAppWindow.contract.test.ts b/frontend/src/views/PhoneAppWindow.contract.test.ts
index 248ef5a..0f1fecc 100644
--- a/frontend/src/views/PhoneAppWindow.contract.test.ts
+++ b/frontend/src/views/PhoneAppWindow.contract.test.ts
@@ -15,5 +15,6 @@ describe('PhoneAppWindow bundle contract', () => {
     expect(source).toContain("app.value?.id === 'app-store'")
     expect(source).toContain('? AppStoreApp : app.value?.component')
     expect(source).toContain('<component :is="builtinAppComponent" />')
+    expect(source).toContain("'app-window--citywarn': app.id === 'citywarn'")
   })
 })
diff --git a/frontend/src/views/PhoneAppWindow.vue b/frontend/src/views/PhoneAppWindow.vue
index d1d9bd6..91b69ec 100644
--- a/frontend/src/views/PhoneAppWindow.vue
+++ b/frontend/src/views/PhoneAppWindow.vue
@@ -27,7 +27,12 @@ const launchStyle = computed(() => {
 </script>
 
 <template>
-  <div v-if="app" class="app-window" :style="launchStyle">
+  <div
+    v-if="app"
+    class="app-window"
+    :class="{ 'app-window--citywarn': app.id === 'citywarn' }"
+    :style="launchStyle"
+  >
     <CustomAppFrame
       v-if="isExternalPhoneApp(app)"
       :key="getCustomAppFrameKey(app)"