diff --git a/Mac/MainWindow/Timeline/TimelineViewController.swift b/Mac/MainWindow/Timeline/TimelineViewController.swift
index 38cec256e..d29c91a8d 100644
--- a/Mac/MainWindow/Timeline/TimelineViewController.swift
+++ b/Mac/MainWindow/Timeline/TimelineViewController.swift
@@ -191,6 +191,8 @@ final class TimelineViewController: NSViewController, UndoableCommandRunner, Unr
 	private let keyboardDelegate = TimelineKeyboardDelegate()
 	private var timelineShowsSeparatorsObserver: NSKeyValueObservation?
 
+	let scrollPositionQueue = CoalescingQueue(name: "Timeline Scroll Position", interval: 0.3, maxInterval: 1.0)
+	
 	convenience init(delegate: TimelineDelegate) {
 		self.init(nibName: "TimelineTableView", bundle: nil)
 		self.delegate = delegate
@@ -223,6 +225,12 @@ final class TimelineViewController: NSViewController, UndoableCommandRunner, Unr
 			NotificationCenter.default.addObserver(self, selector: #selector(containerChildrenDidChange(_:)), name: .ChildrenDidChange, object: nil)
 			NotificationCenter.default.addObserver(self, selector: #selector(userDefaultsDidChange(_:)), name: UserDefaults.didChangeNotification, object: nil)
 
+			if let scrollView = self.tableView.enclosingScrollView {
+				scrollView.contentView.postsBoundsChangedNotifications = true
+				
+				NotificationCenter.default.addObserver(self, selector: #selector(scrollViewDidScroll(notification:)), name: NSView.boundsDidChangeNotification, object: scrollView.contentView)
+			}
+
 			didRegisterForNotifications = true
 		}
 	}
@@ -324,6 +332,20 @@ final class TimelineViewController: NSViewController, UndoableCommandRunner, Unr
 		}
 	}
 	
+	@objc func scrollViewDidScroll(notification: Notification){
+		scrollPositionQueue.add(self, #selector(scrollPositionDidChange))
+	}
+	
+	@objc func scrollPositionDidChange(){
+		let firstVisibleRowIndex = tableView.rows(in: tableView.visibleRect).location
+		guard let unreadArticlesScrolledAway = articles.articlesAbove(position: firstVisibleRowIndex).unreadArticles() else { return }
+
+		guard let undoManager = undoManager, let markReadCommand = MarkStatusCommand(initialArticles: unreadArticlesScrolledAway, markingRead: true, undoManager: undoManager) else {
+			return
+		}
+		runCommand(markReadCommand)
+	}
+	
 	@IBAction func toggleStatusOfSelectedArticles(_ sender: Any?) {
 		guard !selectedArticles.isEmpty else {
 			return
diff --git a/iOS/MasterTimeline/MasterTimelineViewController.swift b/iOS/MasterTimeline/MasterTimelineViewController.swift
index 72a019828..73b39ee99 100644
--- a/iOS/MasterTimeline/MasterTimelineViewController.swift
+++ b/iOS/MasterTimeline/MasterTimelineViewController.swift
@@ -516,6 +516,24 @@ class MasterTimelineViewController: UITableViewController, UndoableCommandRunner
 	
 	@objc func scrollPositionDidChange() {
 		coordinator.timelineMiddleIndexPath = tableView.middleVisibleRow()
+			
+		guard let firstVisibleRowIndexPath = tableView.indexPathsForVisibleRows?[0] else { return }
+		
+		guard let firstVisibleArticle = dataSource.itemIdentifier(for: firstVisibleRowIndexPath) else {
+			return
+		}
+
+		guard let unreadArticlesScrolledAway = coordinator.articles.articlesAbove(article: firstVisibleArticle).unreadArticles() else { return }
+
+		coordinator.markAllAsRead(unreadArticlesScrolledAway)
+		
+		for article in unreadArticlesScrolledAway {
+			if let indexPath = dataSource.indexPath(for: article) {
+				if let cell = tableView.cellForRow(at: indexPath) as? MasterTimelineTableViewCell {
+					configure(cell, article: article)
+				}
+			}
+		}
 	}
 	
 	// MARK: Reloading