diff --git a/Evergreen/AppDelegate.swift b/Evergreen/AppDelegate.swift
index 8267b949c..6d7744d77 100644
--- a/Evergreen/AppDelegate.swift
+++ b/Evergreen/AppDelegate.swift
@@ -86,6 +86,28 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations,
 		panicButtonWindowController!.runSheetOnWindow(window)
 	}
 
+	func markEverywhereAsRead(with window: NSWindow) {
+
+		let alert = NSAlert()
+		alert.messageText = NSLocalizedString("Mark All Articles as Read Everywhere?", comment: "Mark Everywhere alert messageText")
+		alert.informativeText = NSLocalizedString("This will mark every single article as read. All of them. The unread count will be zero.\n\nNote: this operation cannot be undone.", comment: "Mark Everywhere informativeText.")
+
+		alert.addButton(withTitle: NSLocalizedString("Mark All Articles as Read", comment: "Mark Everywhere alert button."))
+		alert.addButton(withTitle: NSLocalizedString("Don’t Mark as Read", comment: "Mark Everywhere alert button."))
+
+		alert.beginSheetModal(for: window) { (returnCode) in
+
+			if returnCode == .alertFirstButtonReturn {
+				self.markEverywhereAsRead()
+			}
+		}
+	}
+
+	func markEverywhereAsRead() {
+
+		AccountManager.shared.accounts.forEach { $0.markEverywhereAsRead() }
+	}
+
 	// MARK: - NSApplicationDelegate
 
 	func applicationDidFinishLaunching(_ note: Notification) {
@@ -377,6 +399,13 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations,
 		createAndShowMainWindow()
 		markOlderArticlesAsRead(with: mainWindowController!.window!)
 	}
+
+	@IBAction func markEverywhereAsRead(_ sender: Any?) {
+
+		createAndShowMainWindow()
+		markEverywhereAsRead(with: mainWindowController!.window!)
+	}
+
 }
 
 private extension AppDelegate {
diff --git a/Evergreen/Base.lproj/Main.storyboard b/Evergreen/Base.lproj/Main.storyboard
index 1a31ca9c3..c1237e996 100644
--- a/Evergreen/Base.lproj/Main.storyboard
+++ b/Evergreen/Base.lproj/Main.storyboard
@@ -438,6 +438,9 @@
                                                     </menuItem>
                                                     <menuItem title="Mark All Everywhere as Read…" id="vfn-M4-V9E">
                                                         <modifierMask key="keyEquivalentModifierMask"/>
+                                                        <connections>
+                                                            <action selector="markEverywhereAsRead:" target="Ady-hI-5gd" id="Sq7-ak-Jaa"/>
+                                                        </connections>
                                                     </menuItem>
                                                 </items>
                                             </menu>
diff --git a/Evergreen/MainWindow/MainWindowController.swift b/Evergreen/MainWindow/MainWindowController.swift
index 33a7487c6..26214a4b1 100644
--- a/Evergreen/MainWindow/MainWindowController.swift
+++ b/Evergreen/MainWindow/MainWindowController.swift
@@ -164,6 +164,11 @@ class MainWindowController : NSWindowController, NSUserInterfaceValidations {
 
 		appDelegate.markOlderArticlesAsRead(with: window!)
 	}
+
+	@IBAction func markEverywhereAsRead(_ sender: Any?) {
+
+		appDelegate.markEverywhereAsRead(with: window!)
+	}
 }
 
 // MARK: - Private
diff --git a/Evergreen/PseudoFeeds/SmartFeed.swift b/Evergreen/PseudoFeeds/SmartFeed.swift
index 8635b5a53..e623399b0 100644
--- a/Evergreen/PseudoFeeds/SmartFeed.swift
+++ b/Evergreen/PseudoFeeds/SmartFeed.swift
@@ -88,7 +88,7 @@ private extension SmartFeed {
 		timer = nil
 	}
 
-	private static let fetchCoalescingDelay: TimeInterval = 0.2
+	private static let fetchCoalescingDelay: TimeInterval = 0.1
 
 	func startTimer() {
 
diff --git a/Frameworks/Account/Account.swift b/Frameworks/Account/Account.swift
index 034db558b..dcdee16ed 100644
--- a/Frameworks/Account/Account.swift
+++ b/Frameworks/Account/Account.swift
@@ -335,6 +335,14 @@ public final class Account: DisplayNameProvider, UnreadCountProvider, Container,
 		database.fetchStarredAndUnreadCount(for: flattenedFeeds(), callback: callback)
 	}
 
+	public func markEverywhereAsRead() {
+
+		// Does not support undo.
+
+		database.markEverywhereAsRead()
+		flattenedFeeds().forEach { $0.unreadCount = 0 }		
+	}
+
 	// MARK: - Notifications
 
 	@objc func downloadProgressDidChange(_ note: Notification) {
diff --git a/Frameworks/Database/ArticlesTable.swift b/Frameworks/Database/ArticlesTable.swift
index 1f0d8eb0f..7d6bd1af1 100644
--- a/Frameworks/Database/ArticlesTable.swift
+++ b/Frameworks/Database/ArticlesTable.swift
@@ -187,6 +187,11 @@ final class ArticlesTable: DatabaseTable {
 
 		return statusesTable.mark(articles.statuses(), statusKey, flag)
 	}
+
+	func markEverywhereAsRead() {
+
+		return statusesTable.markEverywhereAsRead()
+	}
 }
 
 // MARK: - Private
diff --git a/Frameworks/Database/Database.swift b/Frameworks/Database/Database.swift
index 2365274bf..c312cce2e 100644
--- a/Frameworks/Database/Database.swift
+++ b/Frameworks/Database/Database.swift
@@ -84,5 +84,10 @@ public final class Database {
 
 		return articlesTable.mark(articles, statusKey, flag)
 	}
+
+	public func markEverywhereAsRead() {
+
+		articlesTable.markEverywhereAsRead()
+	}
 }
 
diff --git a/Frameworks/Database/StatusesTable.swift b/Frameworks/Database/StatusesTable.swift
index bda6a63d4..421911294 100644
--- a/Frameworks/Database/StatusesTable.swift
+++ b/Frameworks/Database/StatusesTable.swift
@@ -76,6 +76,20 @@ final class StatusesTable: DatabaseTable {
 		return updatedStatuses
 	}
 
+	func markEverywhereAsRead() {
+
+		queue.update { (database) in
+
+			let _ = database.executeUpdate("update statuses set read=1;", withArgumentsIn: nil)
+
+			let cachedStatuses = self.cache.cachedStatuses
+
+			DispatchQueue.main.async {
+				cachedStatuses.forEach { $0.read = true }
+			}
+		}
+	}
+
 	// MARK: Fetching
 
 	func statusWithRow(_ row: FMResultSet) -> ArticleStatus? {
@@ -164,6 +178,11 @@ private final class StatusCache {
 	// Serial database queue only.
 
 	var dictionary = [String: ArticleStatus]()
+	var cachedStatuses: Set<ArticleStatus> {
+		get {
+			return Set(dictionary.values)
+		}
+	}
 
 	func add(_ statuses: Set<ArticleStatus>) {
 
@@ -191,7 +210,7 @@ private final class StatusCache {
 			self[articleID] = status
 		}
 	}
-	
+
 	subscript(_ articleID: String) -> ArticleStatus? {
 		get {
 			return dictionary[articleID]