diff --git a/clients/ios/Classes/FeedDetailViewController.m b/clients/ios/Classes/FeedDetailViewController.m
index 88d972db3..bbce6930f 100644
--- a/clients/ios/Classes/FeedDetailViewController.m
+++ b/clients/ios/Classes/FeedDetailViewController.m
@@ -46,6 +46,7 @@
 @interface FeedDetailViewController ()
 
 @property (nonatomic) UIActionSheet* actionSheet_;  // add this line
+@property (nonatomic) NSUInteger scrollingMarkReadRow;
 
 @end
 
@@ -253,6 +254,7 @@
     self.showImagePreview = [userPreferences boolForKey:@"story_list_preview_images"];
     
     appDelegate.fontDescriptorTitleSize = nil;
+    self.scrollingMarkReadRow = NSNotFound;
     
     [self.storyTitlesTable reloadData];
 }
@@ -329,6 +331,7 @@
     }
     
     appDelegate.originalStoryCount = (int)[appDelegate unreadCount];
+    self.scrollingMarkReadRow = NSNotFound;
     
     if ((storiesCollection.isSocialRiverView ||
          storiesCollection.isSocialView)) {
@@ -1587,6 +1590,28 @@ heightForRowAtIndexPath:(NSIndexPath *)indexPath {
             [self fetchFeedDetail:storiesCollection.feedPage+1 withCallback:nil];
         }
     }
+    
+    NSIndexPath *indexPath = [self.storyTitlesTable indexPathForRowAtPoint:self.storyTitlesTable.contentOffset];
+    NSString *scrollPref = [[NSUserDefaults standardUserDefaults] stringForKey:@"default_scroll_read_filter"];
+    
+    if (indexPath && [scrollPref isEqualToString:@"mark_on_scroll"]) {
+        NSUInteger topRow = indexPath.row;
+        
+        if (self.scrollingMarkReadRow == NSNotFound) {
+            self.scrollingMarkReadRow = topRow;
+        } else if (topRow > self.scrollingMarkReadRow) {
+            for (NSUInteger thisRow = self.scrollingMarkReadRow; thisRow < topRow; thisRow++) {
+                NSInteger storyIndex = [storiesCollection indexFromLocation:thisRow];
+                NSDictionary *story = [[storiesCollection activeFeedStories] objectAtIndex:storyIndex];
+                
+                if ([storiesCollection isStoryUnread:story]) {
+                    [storiesCollection markStoryRead:story];
+                }
+            }
+            
+            self.scrollingMarkReadRow = topRow;
+        }
+    }
 }
 
 - (void)changeIntelligence:(NSInteger)newLevel {
diff --git a/clients/ios/Resources/Settings.bundle/Root.plist b/clients/ios/Resources/Settings.bundle/Root.plist
index c04cb76c8..45d580f3a 100644
--- a/clients/ios/Resources/Settings.bundle/Root.plist
+++ b/clients/ios/Resources/Settings.bundle/Root.plist
@@ -70,6 +70,26 @@
 			<key>Key</key>
 			<string>default_feed_read_filter</string>
 		</dict>
+		<dict>
+			<key>Type</key>
+			<string>PSMultiValueSpecifier</string>
+			<key>Title</key>
+			<string>Mark stories read on scroll</string>
+			<key>Titles</key>
+			<array>
+				<string>Mark read when scrolling past</string>
+				<string>Don't automatically mark read</string>
+			</array>
+			<key>DefaultValue</key>
+			<string>nothing</string>
+			<key>Values</key>
+			<array>
+				<string>mark_on_scroll</string>
+				<string>nothing</string>
+			</array>
+			<key>Key</key>
+			<string>default_scroll_read_filter</string>
+		</dict>
 		<dict>
 			<key>Type</key>
 			<string>PSToggleSwitchSpecifier</string>
diff --git a/clients/ios/Resources/Settings.bundle/Root~ipad.plist b/clients/ios/Resources/Settings.bundle/Root~ipad.plist
index 5eb0625f9..7e351194b 100644
--- a/clients/ios/Resources/Settings.bundle/Root~ipad.plist
+++ b/clients/ios/Resources/Settings.bundle/Root~ipad.plist
@@ -70,6 +70,26 @@
 			<key>Key</key>
 			<string>default_feed_read_filter</string>
 		</dict>
+        <dict>
+            <key>Type</key>
+            <string>PSMultiValueSpecifier</string>
+            <key>Title</key>
+            <string>Mark stories read on scroll</string>
+            <key>Titles</key>
+            <array>
+                <string>Mark read when scrolling past</string>
+                <string>Don't automatically mark read</string>
+            </array>
+            <key>DefaultValue</key>
+            <string>nothing</string>
+            <key>Values</key>
+            <array>
+                <string>mark_on_scroll</string>
+                <string>nothing</string>
+            </array>
+            <key>Key</key>
+            <string>default_scroll_read_filter</string>
+        </dict>
 		<dict>
 			<key>Type</key>
 			<string>PSMultiValueSpecifier</string>