diff --git a/lib/utils/message-pinning-utils.js b/lib/utils/message-pinning-utils.js
--- a/lib/utils/message-pinning-utils.js
+++ b/lib/utils/message-pinning-utils.js
@@ -19,4 +19,10 @@
   return isValidMessage && hasManagePinsPermission;
 }
 
-export { canToggleMessagePin };
+function pinnedMessageCountText(pinnedCount: number): string {
+  const messageNoun = pinnedCount === 1 ? 'message' : 'messages';
+
+  return `${pinnedCount} pinned ${messageNoun}`;
+}
+
+export { canToggleMessagePin, pinnedMessageCountText };
diff --git a/native/chat/message-list-container.react.js b/native/chat/message-list-container.react.js
--- a/native/chat/message-list-container.react.js
+++ b/native/chat/message-list-container.react.js
@@ -19,6 +19,7 @@
 } from 'lib/shared/thread-utils.js';
 import type { ThreadInfo } from 'lib/types/thread-types.js';
 import type { AccountUserInfo, UserListItem } from 'lib/types/user-types.js';
+import { pinnedMessageCountText } from 'lib/utils/message-pinning-utils.js';
 
 import { type MessagesMeasurer, useHeightMeasurer } from './chat-context.js';
 import { ChatInputBar } from './chat-input-bar.react.js';
@@ -361,13 +362,9 @@
       state => threadInfoSelector(state)[genesis.id],
     );
 
-    let bannerText;
-    if (!threadInfo.pinnedCount || threadInfo.pinnedCount === 0) {
-      bannerText = '';
-    } else {
-      const messageNoun = threadInfo.pinnedCount === 1 ? 'message' : 'messages';
-      bannerText = `${threadInfo.pinnedCount} pinned ${messageNoun}`;
-    }
+    const bannerText =
+      !!threadInfo.pinnedCount &&
+      pinnedMessageCountText(threadInfo.pinnedCount);
 
     const navigateToMessageResults = React.useCallback(() => {
       props.navigation.navigate<'MessageResultsScreen'>({
diff --git a/web/chat/thread-top-bar.react.js b/web/chat/thread-top-bar.react.js
--- a/web/chat/thread-top-bar.react.js
+++ b/web/chat/thread-top-bar.react.js
@@ -8,6 +8,7 @@
 import { threadIsPending } from 'lib/shared/thread-utils.js';
 import type { ThreadInfo } from 'lib/types/thread-types.js';
 import { useResolvedThreadInfo } from 'lib/utils/entity-helpers.js';
+import { pinnedMessageCountText } from 'lib/utils/message-pinning-utils.js';
 
 import ThreadMenu from './thread-menu.react.js';
 import css from './thread-top-bar.css';
@@ -29,15 +30,9 @@
     threadMenu = <ThreadMenu threadInfo={threadInfo} />;
   }
 
-  const bannerText = React.useMemo(() => {
-    if (!threadInfo.pinnedCount || threadInfo.pinnedCount === 0) {
-      return '';
-    }
-
-    const messageNoun = threadInfo.pinnedCount === 1 ? 'message' : 'messages';
-
-    return `${threadInfo.pinnedCount} pinned ${messageNoun}`;
-  }, [threadInfo.pinnedCount]);
+  const bannerText = threadInfo.pinnedCount
+    ? pinnedMessageCountText(threadInfo.pinnedCount)
+    : '';
 
   const inputState = React.useContext(InputStateContext);
   const pushThreadPinsModal = React.useCallback(() => {