diff --git a/web/nfc-theme/static/user.js b/web/nfc-theme/static/user.js
index bed26af..2ad1fe1 100644
--- a/web/nfc-theme/static/user.js
+++ b/web/nfc-theme/static/user.js
@@ -22,7 +22,8 @@ if ( !Cookies.get('nfcexplorer') ) {
     Cookies.set('nfcexplorer', generateUUID())
 }
 
-cat = document.querySelector('meta[data-category]').content
+const ua = String(platform.os);
+const cat = document.querySelector('meta[data-category]').content
 
 fetch('https://nmns.place/track?' + new URLSearchParams({
     hash: Cookies.get('nfcexplorer'),
diff --git a/web/nfc-theme/templates/article.html b/web/nfc-theme/templates/article.html
index 424e7e7..c067bac 100644
--- a/web/nfc-theme/templates/article.html
+++ b/web/nfc-theme/templates/article.html
@@ -17,5 +17,6 @@
   </section>
 {% endblock %}
 {% block scripts %}
+<script src="{{ SITEURL }}/theme/platform.js"></script>
 <script src="{{ SITEURL }}/theme/user.js"></script>
 {% endblock %}
\ No newline at end of file