diff --git a/src/app/chat/components/pwa-install-overlay.tsx b/src/app/chat/components/pwa-install-overlay.tsx
index dddfc007..fc9a71a2 100644
--- a/src/app/chat/components/pwa-install-overlay.tsx
+++ b/src/app/chat/components/pwa-install-overlay.tsx
@@ -14,6 +14,7 @@
  */
 import { useEffect } from "react";
 
+import { BrowserDetector } from "@/utils/browser-detect";
 import { SpAsyncUtil } from "@/utils/storage";
 import { pwaUtil } from "@/utils/pwa";
 
@@ -32,6 +33,7 @@ export function PwaInstallOverlay() {
       //    isInstalled() 检查 standalone display-mode（避免给已安装用户再弹）
       if (!pwaUtil.isSupported()) return;
       if (pwaUtil.isInstalled()) return;
+      if (BrowserDetector.isInAppBrowser()) return;
       // 提前挂 beforeinstallprompt 监听，避免用户点 OK 时事件已在更早时机丢失。
       pwaUtil.prepareInstallPrompt();
 
diff --git a/src/integrations/index.ts b/src/integrations/index.ts
index 9652de67..30be615f 100644
--- a/src/integrations/index.ts
+++ b/src/integrations/index.ts
@@ -2,5 +2,4 @@
  * @file Automatically generated by barrelsby.
  */
 
-export * from "./browser-detect";
 export * from "./media-recorder";
diff --git a/src/integrations/browser-detect.ts b/src/utils/browser-detect.ts
similarity index 79%
rename from src/integrations/browser-detect.ts
rename to src/utils/browser-detect.ts
index fbcd1d5f..4f473193 100644
--- a/src/integrations/browser-detect.ts
+++ b/src/utils/browser-detect.ts
@@ -29,13 +29,4 @@ export const BrowserDetector = {
     return /WebView|; wv\)|FBAN|FBAV|MicroMessenger|Instagram|Line\//i.test(userAgent);
   },
 
-  /** 当前是否以 PWA standalone 模式运行 */
-  isPWAStandalone(): boolean {
-    if (typeof window === "undefined") return false;
-    return (
-      window.matchMedia?.("(display-mode: standalone)").matches === true ||
-      // iOS Safari 旧版
-      (navigator as Navigator & { standalone?: boolean }).standalone === true
-    );
-  },
 };