diff --git a/src/components/back-button-guard.tsx b/src/components/back-button-guard.tsx
index e605f72..f41d4c1 100644
--- a/src/components/back-button-guard.tsx
+++ b/src/components/back-button-guard.tsx
@@ -12,13 +12,16 @@ import Swal from "sweetalert2";
  */
 export default function BackButtonGuard() {
   useEffect(() => {
-    // standalone 모드 (PWA 설치 또는 TWA) 인지 확인
+    // standalone(PWA/TWA) 이거나 모바일 UA 면 활성화
+    // (TWA 일부 환경에서 display-mode 가 standalone 으로 보고되지 않는 케이스 대응)
     const isStandalone =
       window.matchMedia("(display-mode: standalone)").matches ||
-      // iOS Safari
+      window.matchMedia("(display-mode: fullscreen)").matches ||
+      window.matchMedia("(display-mode: minimal-ui)").matches ||
       (window.navigator as Navigator & { standalone?: boolean }).standalone === true;
+    const isMobileUA = /Mobile|Android|iPhone|iPad|iPod/i.test(window.navigator.userAgent);
 
-    if (!isStandalone) return;
+    if (!isStandalone && !isMobileUA) return;
 
     let lastBackPress = 0;
     let toastTimer: ReturnType<typeof setTimeout> | null = null;
diff --git a/src/middleware.ts b/src/middleware.ts
index 79633ef..1a9eb5d 100644
--- a/src/middleware.ts
+++ b/src/middleware.ts
@@ -38,6 +38,14 @@ export function middleware(request: NextRequest) {
       return NextResponse.redirect(new URL("/m/dashboard", request.url));
     }
   }
+  // 모바일(앱/모바일브라우저)에서 /login 접근 시 /m/login 으로 전환
+  if (pathname === "/login") {
+    const ua = request.headers.get("user-agent") || "";
+    const isMobile = /Mobile|Android|iPhone|iPad|iPod/i.test(ua);
+    if (isMobile) {
+      return NextResponse.redirect(new URL("/m/login", request.url));
+    }
+  }
   if (publicPaths.some((p) => pathname.startsWith(p))) {
     return NextResponse.next();
   }
diff --git a/src/store/auth-store.ts b/src/store/auth-store.ts
index 0661807..1581363 100644
--- a/src/store/auth-store.ts
+++ b/src/store/auth-store.ts
@@ -20,7 +20,12 @@ export const useAuthStore = create<AuthState>((set) => ({
   logout: async () => {
     await fetch("/api/auth/logout", { method: "POST" });
     set({ user: null });
-    window.location.href = "/login";
+    // 모바일(앱/모바일브라우저) → /m/login, 데스크톱 → /login
+    const isMobile =
+      typeof window !== "undefined" &&
+      (window.matchMedia("(max-width: 768px)").matches ||
+        /Mobile|Android|iPhone|iPad|iPod/i.test(window.navigator.userAgent));
+    window.location.href = isMobile ? "/m/login" : "/login";
   },
 
   fetchUser: async () => {