diff --git a/packages/app/src/composer/input/input.tsx b/packages/app/src/composer/input/input.tsx
index a565d6085..235520c40 100644
--- a/packages/app/src/composer/input/input.tsx
+++ b/packages/app/src/composer/input/input.tsx
@@ -2,6 +2,8 @@ import {
   View,
   Text,
   TextInput,
+  Pressable,
+  Platform,
   ActivityIndicator,
   useWindowDimensions,
   NativeSyntheticEvent,
@@ -46,6 +48,8 @@ import {
   DropdownMenuItem,
   DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
+import { AdaptiveModalSheet, type SheetHeader } from "@/components/adaptive-modal-sheet";
+import { useDismissKeyboardOnOpen } from "@/components/ui/keyboard-dismiss";
 import { useWebElementScrollbar } from "@/components/use-web-scrollbar";
 import { useShortcutKeys } from "@/hooks/use-shortcut-keys";
 import { useIosHardwareKeyboardSubmit } from "@/hooks/use-ios-hardware-keyboard-submit";
@@ -138,6 +142,8 @@ const MIN_INPUT_HEIGHT_DESKTOP = 46;
 const DEFAULT_MAX_INPUT_HEIGHT = 160;
 const MAX_INPUT_VIEWPORT_RATIO = 0.5;
 const MIN_INPUT_HEIGHT = isWeb ? MIN_INPUT_HEIGHT_DESKTOP : MIN_INPUT_HEIGHT_MOBILE;
+const ATTACHMENT_SHEET_HEADER: SheetHeader = { title: "Add attachment" };
+const ATTACHMENT_SHEET_SNAP_POINTS = ["28%", "45%"];
 
 type WebTextInputKeyPressEvent = NativeSyntheticEvent<
   TextInputKeyPressEventData & {
@@ -198,6 +204,55 @@ function AttachmentMenuList({ items }: { items: AttachmentMenuItem[] }) {
   );
 }
 
+function AttachmentSheetItem({
+  item,
+  onSelect,
+}: {
+  item: AttachmentMenuItem;
+  onSelect: (item: AttachmentMenuItem) => void;
+}) {
+  const handlePress = useCallback(() => {
+    onSelect(item);
+  }, [item, onSelect]);
+  const pressableStyle = useCallback(
+    ({ pressed }: { pressed: boolean }) => [
+      styles.attachmentSheetItem,
+      pressed && styles.attachmentSheetItemPressed,
+      item.disabled && styles.buttonDisabled,
+    ],
+    [item.disabled],
+  );
+
+  return (
+    <Pressable
+      testID={`message-input-attachment-menu-item-${item.id}`}
+      accessibilityRole="button"
+      disabled={item.disabled}
+      onPress={handlePress}
+      style={pressableStyle}
+    >
+      {item.icon ? <View style={styles.attachmentSheetItemIcon}>{item.icon}</View> : null}
+      <Text style={styles.attachmentSheetItemText}>{item.label}</Text>
+    </Pressable>
+  );
+}
+
+function AttachmentSheetList({
+  items,
+  onSelect,
+}: {
+  items: AttachmentMenuItem[];
+  onSelect: (item: AttachmentMenuItem) => void;
+}) {
+  return (
+    <View style={styles.attachmentSheetList}>
+      {items.map((item) => (
+        <AttachmentSheetItem key={item.id} item={item} onSelect={onSelect} />
+      ))}
+    </View>
+  );
+}
+
 function AttachmentDropdown({
   isConnected,
   disabled,
@@ -211,12 +266,73 @@ function AttachmentDropdown({
   renderAttachButtonIcon: (input: { hovered?: boolean }) => React.ReactElement;
   attachmentMenuItems: AttachmentMenuItem[];
 }) {
+  const isCompact = useIsCompactFormFactor();
+  const [isSheetOpen, setIsSheetOpen] = useState(false);
+  useDismissKeyboardOnOpen(isSheetOpen, isCompact);
+
+  const isButtonDisabled = !isConnected || disabled;
+  const handleOpenSheet = useCallback(() => {
+    if (isButtonDisabled) return;
+    setIsSheetOpen(true);
+  }, [isButtonDisabled]);
+  const handleCloseSheet = useCallback(() => {
+    setIsSheetOpen(false);
+  }, []);
+  const handleSheetItemSelect = useCallback((item: AttachmentMenuItem) => {
+    if (item.disabled) return;
+    setIsSheetOpen(false);
+    if (Platform.OS === "ios") {
+      setTimeout(item.onSelect, 250);
+      return;
+    }
+    item.onSelect();
+  }, []);
+  const mobileAttachButtonStyle = useCallback(
+    (state: { pressed: boolean; hovered?: boolean }) => {
+      if (typeof attachButtonStyle === "function") {
+        return attachButtonStyle({ ...state, hovered: Boolean(state.hovered), open: isSheetOpen });
+      }
+      return attachButtonStyle;
+    },
+    [attachButtonStyle, isSheetOpen],
+  );
+  const renderMobileAttachButtonIcon = useCallback(
+    ({ hovered }: { hovered?: boolean }) => renderAttachButtonIcon({ hovered }),
+    [renderAttachButtonIcon],
+  );
+
+  if (isCompact) {
+    return (
+      <>
+        <Pressable
+          disabled={isButtonDisabled}
+          accessibilityLabel="Add attachment"
+          accessibilityRole="button"
+          testID="message-input-attach-button"
+          onPress={handleOpenSheet}
+          style={mobileAttachButtonStyle}
+        >
+          {renderMobileAttachButtonIcon}
+        </Pressable>
+        <AdaptiveModalSheet
+          header={ATTACHMENT_SHEET_HEADER}
+          visible={isSheetOpen}
+          onClose={handleCloseSheet}
+          snapPoints={ATTACHMENT_SHEET_SNAP_POINTS}
+          testID="message-input-attachment-menu"
+        >
+          <AttachmentSheetList items={attachmentMenuItems} onSelect={handleSheetItemSelect} />
+        </AdaptiveModalSheet>
+      </>
+    );
+  }
+
   return (
     <DropdownMenu>
       <Tooltip delayDuration={0} enabledOnDesktop enabledOnMobile={false}>
         <TooltipTrigger asChild>
           <DropdownMenuTrigger
-            disabled={!isConnected || disabled}
+            disabled={isButtonDisabled}
             accessibilityLabel="Add attachment"
             accessibilityRole="button"
             testID="message-input-attach-button"
@@ -1950,6 +2066,31 @@ const styles = StyleSheet.create((theme: Theme) => ({
   buttonDisabled: {
     opacity: 0.5,
   },
+  attachmentSheetList: {
+    gap: theme.spacing[1],
+  },
+  attachmentSheetItem: {
+    minHeight: 44,
+    flexDirection: "row",
+    alignItems: "center",
+    gap: theme.spacing[3],
+    paddingHorizontal: theme.spacing[3],
+    paddingVertical: theme.spacing[2],
+    borderRadius: theme.borderRadius.xl,
+  },
+  attachmentSheetItemPressed: {
+    backgroundColor: theme.colors.surface2,
+  },
+  attachmentSheetItemIcon: {
+    width: 20,
+    alignItems: "center",
+    justifyContent: "center",
+  },
+  attachmentSheetItemText: {
+    color: theme.colors.foreground,
+    fontSize: theme.fontSize.base,
+    fontWeight: theme.fontWeight.normal,
+  },
   overlayContainer: {
     position: "absolute",
     display: "flex",