diff --git a/packages/trs80-cassette-webapp/docs/index.html b/packages/trs80-cassette-webapp/docs/index.html
index defe401..b9fdcc3 100644
--- a/packages/trs80-cassette-webapp/docs/index.html
+++ b/packages/trs80-cassette-webapp/docs/index.html
@@ -2,6 +2,14 @@
 <html>
 
 <head>
+    <!-- Google tag (gtag.js) -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id=G-PRCQT25RPV"></script>
+    <script>
+      window.dataLayer = window.dataLayer || [];
+      function gtag(){dataLayer.push(arguments);}
+      gtag('js', new Date());
+      gtag('config', 'G-PRCQT25RPV');
+    </script>
     <meta charset="UTF-8">
     <title>TRS-80 Cassette Reader</title>
     <link href="main.css?v=3" rel="stylesheet" type="text/css">
diff --git a/packages/trs80-ide/src/index-template.ejs b/packages/trs80-ide/src/index-template.ejs
index ec67363..a8f0eb0 100644
--- a/packages/trs80-ide/src/index-template.ejs
+++ b/packages/trs80-ide/src/index-template.ejs
@@ -1,6 +1,14 @@
 <!DOCTYPE html>
 <html>
   <head>
+    <!-- Google tag (gtag.js) -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id=G-GV9Z2JHX5D"></script>
+    <script>
+      window.dataLayer = window.dataLayer || [];
+      function gtag(){dataLayer.push(arguments);}
+      gtag('js', new Date());
+      gtag('config', 'G-GV9Z2JHX5D');
+    </script>
     <meta charset="utf-8">
     <title><%= htmlWebpackPlugin.options.title %></title>
     <link href="https://fonts.googleapis.com/css?family=Roboto+Condensed:300|Roboto+Mono|Roboto:100,400,700&display=block" rel="stylesheet">
