diff --git a/contents/static/pruefung_sidebar.html b/contents/static/pruefung_sidebar.html
index 77bc146..d042835 100644
--- a/contents/static/pruefung_sidebar.html
+++ b/contents/static/pruefung_sidebar.html
@@ -21,6 +21,7 @@
 <ul>
 <li><a href="https://play.google.com/store/apps/details?id=de.darc.fuenfizigohm&amp;hl=gsw" target="_blank" rel="noopener">Android</a></li>
 <li><a href="https://apps.apple.com/de/app/50ohm/id6474642114" target="_blank" rel="noopener">iPhone</a></li>
+<li><a href="https://app.darc.de/obtainium.html" target="_blank" rel="noopener">Obtainium</a></li>  
 <li><a href="https://github.com/DARC-e-V/50ohm-pocket" target="_blank" rel="noopener">Github</a></li>
 </ul>
 <p>Externe Trainingsmethoden:</p>