diff --git a/spec/zot.txt b/spec/zot.txt
index 2c3bbb1800..e1e4640c90 100644
--- a/spec/zot.txt
+++ b/spec/zot.txt
@@ -353,7 +353,7 @@ Salmon Magic Envelope
 Atom Activity Stream Draft
 	http://activitystrea.ms/specs/atom/1.0/
 
-Activty Stream Base Schema
+Activity Stream Base Schema
 	http://activitystrea.ms/head/activity-schema.html
 
 WebFinger Protocol
diff --git a/src/Model/Nodeinfo.php b/src/Model/Nodeinfo.php
index 51692f0163..4dbe06c9b3 100644
--- a/src/Model/Nodeinfo.php
+++ b/src/Model/Nodeinfo.php
@@ -67,7 +67,7 @@ class Nodeinfo
 		DI::keyValue()->set('nodeinfo_local_posts', $posts);
 		DI::keyValue()->set('nodeinfo_local_comments', $comments);
 
-		$logger->info('User actitivy', ['posts' => $posts, 'comments' => $comments]);
+		$logger->info('User activity', ['posts' => $posts, 'comments' => $comments]);
 	}
 
 	/**
diff --git a/src/Model/User.php b/src/Model/User.php
index 50586183a3..80c8f60b89 100644
--- a/src/Model/User.php
+++ b/src/Model/User.php
@@ -684,7 +684,7 @@ class User
 
 		if ($user['last-activity'] != $current_day) {
 			User::update(['last-activity' => $current_day], $uid);
-			// Set the last actitivy for all identities of the user
+			// Set the last activity for all identities of the user
 			DBA::update('user', ['last-activity' => $current_day], ['parent-uid' => $uid, 'account_removed' => false]);
 		}
 	}
diff --git a/view/theme/vier/mobile.css b/view/theme/vier/mobile.css
index 6a70d55b14..e49cff9ee4 100644
--- a/view/theme/vier/mobile.css
+++ b/view/theme/vier/mobile.css
@@ -1,4 +1,4 @@
-aside, header, #nav-search-box, #nav-admin-link, #nav-messages-linkmenu,  #activitiy-by-date-tab, #shared-links-tab, #nav-logout-link,
+aside, header, #nav-search-box, #nav-admin-link, #nav-messages-linkmenu,  #activity-by-date-tab, #shared-links-tab, #nav-logout-link,
 .wall-item-location {
   display: none;
 }