diff --git a/apps/readest-app/src/app/reader/components/FooterBar.tsx b/apps/readest-app/src/app/reader/components/FooterBar.tsx
index 2b31f29f..2a0de4ee 100644
--- a/apps/readest-app/src/app/reader/components/FooterBar.tsx
+++ b/apps/readest-app/src/app/reader/components/FooterBar.tsx
@@ -81,11 +81,16 @@ const FooterBar: React.FC<FooterBarProps> = ({
         isHoveredAnim && 'hover-bar-anim',
         hoveredBookKey === bookKey ? `opacity-100` : `opacity-0`,
       )}
+      dir={viewSettings?.rtl ? 'rtl' : 'ltr'}
       onMouseEnter={() => setHoveredBookKey(bookKey)}
       onMouseLeave={() => setHoveredBookKey('')}
     >
       <div className='hidden sm:flex'>
-        <Button icon={<RiArrowLeftWideLine />} onClick={handleGoPrev} tooltip={_('Go Left')} />
+        <Button
+          icon={viewSettings?.rtl ? <RiArrowRightWideLine /> : <RiArrowLeftWideLine />}
+          onClick={viewSettings?.rtl ? handleGoNext : handleGoPrev}
+          tooltip={viewSettings?.rtl ? _('Go Right') : _('Go Left')}
+        />
       </div>
       <Button
         icon={<RiArrowGoBackLine />}
@@ -104,7 +109,7 @@ const FooterBar: React.FC<FooterBarProps> = ({
       </span>
       <input
         type='range'
-        className={clsx('text-base-content mx-2 w-full', viewSettings?.rtl && 'direction-rtl')}
+        className='text-base-content mx-2 w-full'
         min={0}
         max={100}
         value={progressValid ? progressFraction * 100 : 0}
@@ -112,7 +117,11 @@ const FooterBar: React.FC<FooterBarProps> = ({
       />
       <Button icon={<FaHeadphones />} onClick={handleSpeakText} tooltip={_('Speak')} />
       <div className='hidden sm:flex'>
-        <Button icon={<RiArrowRightWideLine />} onClick={handleGoNext} tooltip={_('Go Right')} />
+        <Button
+          icon={viewSettings?.rtl ? <RiArrowLeftWideLine /> : <RiArrowRightWideLine />}
+          onClick={viewSettings?.rtl ? handleGoPrev : handleGoNext}
+          tooltip={viewSettings?.rtl ? _('Go Left') : _('Go Right')}
+        />
       </div>
     </div>
   );
diff --git a/apps/readest-app/src/app/reader/components/annotator/AnnotationPopup.tsx b/apps/readest-app/src/app/reader/components/annotator/AnnotationPopup.tsx
index b4108aaa..c59e6a7c 100644
--- a/apps/readest-app/src/app/reader/components/annotator/AnnotationPopup.tsx
+++ b/apps/readest-app/src/app/reader/components/annotator/AnnotationPopup.tsx
@@ -7,6 +7,7 @@ import { HighlightColor, HighlightStyle } from '@/types/book';
 import { useResponsiveSize } from '@/hooks/useResponsiveSize';
 
 interface AnnotationPopupProps {
+  dir: 'ltr' | 'rtl';
   buttons: Array<{ tooltipText: string; Icon: React.ElementType; onClick: () => void }>;
   position: Position;
   trianglePosition: Position;
@@ -22,6 +23,7 @@ const OPTIONS_HEIGHT_PIX = 28;
 const OPTIONS_PADDING_PIX = 16;
 
 const AnnotationPopup: React.FC<AnnotationPopupProps> = ({
+  dir,
   buttons,
   position,
   trianglePosition,
@@ -35,7 +37,7 @@ const AnnotationPopup: React.FC<AnnotationPopupProps> = ({
   const highlightOptionsHeightPx = useResponsiveSize(OPTIONS_HEIGHT_PIX);
   const highlightOptionsPaddingPx = useResponsiveSize(OPTIONS_PADDING_PIX);
   return (
-    <div>
+    <div dir={dir}>
       <Popup
         width={popupWidth}
         height={popupHeight}
diff --git a/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx b/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx
index ec285ac0..a5234f28 100644
--- a/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx
+++ b/apps/readest-app/src/app/reader/components/annotator/Annotator.tsx
@@ -76,7 +76,7 @@ const Annotator: React.FC<{ bookKey: string }> = ({ bookKey }) => {
   const dictPopupHeight = Math.min(300, maxHeight);
   const transPopupWidth = Math.min(480, maxWidth);
   const transPopupHeight = Math.min(360, maxHeight);
-  const annotPopupWidth = useResponsiveSize(280);
+  const annotPopupWidth = useResponsiveSize(300);
   const annotPopupHeight = useResponsiveSize(44);
   const androidSelectionHandlerHeight = 8;
 
@@ -487,6 +487,7 @@ const Annotator: React.FC<{ bookKey: string }> = ({ bookKey }) => {
       )}
       {showAnnotPopup && trianglePosition && annotPopupPosition && (
         <AnnotationPopup
+          dir={viewSettings.rtl ? 'rtl' : 'ltr'}
           buttons={buttons}
           position={annotPopupPosition}
           trianglePosition={trianglePosition}
diff --git a/apps/readest-app/src/app/reader/components/sidebar/BookCard.tsx b/apps/readest-app/src/app/reader/components/sidebar/BookCard.tsx
index 905bcfdd..4c7b72f2 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/BookCard.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/BookCard.tsx
@@ -23,7 +23,7 @@ const BookCard = ({ book }: { book: Book }) => {
         alt={_('Book Cover')}
         width={56}
         height={80}
-        className='mr-4 aspect-auto max-h-16 w-[15%] max-w-12 rounded-sm object-cover shadow-md'
+        className='me-4 aspect-auto max-h-16 w-[15%] max-w-12 rounded-sm object-cover shadow-md'
         onError={(e) => {
           (e.target as HTMLImageElement).style.display = 'none';
         }}
diff --git a/apps/readest-app/src/app/reader/components/sidebar/Header.tsx b/apps/readest-app/src/app/reader/components/sidebar/Header.tsx
index 4a55f759..81b7f5ab 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/Header.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/Header.tsx
@@ -26,9 +26,10 @@ const SidebarHeader: React.FC<{
   return (
     <div
       className={clsx(
-        'sidebar-header flex h-11 items-center justify-between pr-2',
-        isTrafficLightVisible ? 'pl-20' : 'pl-1.5',
+        'sidebar-header flex h-11 items-center justify-between pe-2',
+        isTrafficLightVisible ? 'pl-20' : 'ps-1.5',
       )}
+      dir='ltr'
     >
       <div className='flex items-center gap-x-8'>
         <button
diff --git a/apps/readest-app/src/app/reader/components/sidebar/SideBar.tsx b/apps/readest-app/src/app/reader/components/sidebar/SideBar.tsx
index 3eb79a82..e36e9dc5 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/SideBar.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/SideBar.tsx
@@ -32,7 +32,7 @@ const SideBar: React.FC<{
   const { settings } = useSettingsStore();
   const { sideBarBookKey } = useSidebarStore();
   const { getBookData } = useBookDataStore();
-  const { getView } = useReaderStore();
+  const { getView, getViewSettings } = useReaderStore();
   const [isSearchBarVisible, setIsSearchBarVisible] = useState(false);
   const [searchResults, setSearchResults] = useState<BookSearchResult[] | null>(null);
   const [searchTerm, setSearchTerm] = useState('');
@@ -162,6 +162,7 @@ const SideBar: React.FC<{
 
   if (!sideBarBookKey) return null;
 
+  const viewSettings = getViewSettings(sideBarBookKey);
   const bookData = getBookData(sideBarBookKey);
   if (!bookData || !bookData.book || !bookData.bookDoc) {
     return null;
@@ -178,6 +179,7 @@ const SideBar: React.FC<{
           appService?.hasRoundedWindow && 'rounded-window-top-left rounded-window-bottom-left',
           !isSideBarPinned && 'shadow-2xl',
         )}
+        dir={viewSettings?.rtl ? 'rtl' : 'ltr'}
         style={{
           width: `${sideBarWidth}`,
           maxWidth: `${MAX_SIDEBAR_WIDTH * 100}%`,
diff --git a/apps/readest-app/src/app/reader/components/sidebar/TabNavigation.tsx b/apps/readest-app/src/app/reader/components/sidebar/TabNavigation.tsx
index 841842b6..fdc90ddf 100644
--- a/apps/readest-app/src/app/reader/components/sidebar/TabNavigation.tsx
+++ b/apps/readest-app/src/app/reader/components/sidebar/TabNavigation.tsx
@@ -15,10 +15,11 @@ const TabNavigation: React.FC<{
   return (
     <div
       className={clsx('bottom-tab border-base-300/50 bg-base-200 relative flex w-full border-t')}
+      dir='ltr'
     >
       <div
         className={clsx(
-          'bg-base-300 absolute bottom-1.5 left-1 h-[calc(100%-12px)] w-[calc(33.3%-8px)] rounded-lg',
+          'bg-base-300 absolute bottom-1.5 start-1 h-[calc(100%-12px)] w-[calc(33.3%-8px)] rounded-lg',
           'transform transition-transform duration-300',
           activeTab === 'toc' && 'translate-x-0',
           activeTab === 'annotations' && 'translate-x-[calc(100%+8px)]',