diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77829189..90f3fd2a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,9 +4,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project tries to adhere to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.2.0] - 2020-10-05
+### Added
+- posthog event to distinguish between mobile/desktop device
+
 ## [1.1.0] - 2020-09-02
 ### Changed
 - legal and dgstvo links are not shown on summary page
+
 ### Fixed
 - On some devices desktop parts were hidden 
 
diff --git a/e_metrobus/__init__.py b/e_metrobus/__init__.py
index 73583f9c..64f9c53d 100644
--- a/e_metrobus/__init__.py
+++ b/e_metrobus/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "1.1.0"
+__version__ = "1.2.0"
 __version_info__ = tuple(
     [
         int(num) if num.isdigit() else num
diff --git a/e_metrobus/navigation/urls.py b/e_metrobus/navigation/urls.py
index b18a9efd..10360ab9 100644
--- a/e_metrobus/navigation/urls.py
+++ b/e_metrobus/navigation/urls.py
@@ -35,6 +35,7 @@
     path("get_desktop_page/", view=views.DesktopPage.as_view(), name="get_desktop_page"),
     path("accept_privacy_policy/", views.accept_privacy_policy),
     path("send_posthog_event/", views.send_posthog_event),
+    path("check_mobile/", views.check_mobile),
     path(
         "get_comparison_chart/", views.get_comparison_chart, name="get_comparison_chart"
     ),
diff --git a/e_metrobus/navigation/views.py b/e_metrobus/navigation/views.py
index 9d8854e5..271dcdd4 100644
--- a/e_metrobus/navigation/views.py
+++ b/e_metrobus/navigation/views.py
@@ -439,6 +439,8 @@ def get_context_data(self, **kwargs):
             context["visited"] = True
         if "privacy" in self.request.session:
             context["privacy_accepted"] = True
+        if "mobile" not in self.request.session:
+            context["initial_mobile_check"] = True
         return context
 
 
@@ -465,6 +467,12 @@ def send_posthog_event(request):
     return HttpResponse()
 
 
+def check_mobile(request):
+    request.session["mobile"] = request.GET["is_mobile"]
+    utils.posthog_event(request)
+    return HttpResponse()
+
+
 def get_comparison_chart(request):
     chart_order = ("pedestrian", "e-bus", "e-pkw", "bus", "car")
     route = request.GET["route"]
diff --git a/e_metrobus/templates/base.html b/e_metrobus/templates/base.html
index df5f1f06..0e794dab 100644
--- a/e_metrobus/templates/base.html
+++ b/e_metrobus/templates/base.html
@@ -142,6 +142,14 @@
           $("#desktop").show();
           $("#portrait").remove();
         }
+
+        {% if initial_mobile_check %}
+          $.ajax({
+            url: "/check_mobile/",
+            dataType: "html",
+            data: {"is_mobile": check_mobile()}
+          });
+        {% endif %}
       </script>
     {% endblock javascript %}
   </body>
diff --git a/package.json b/package.json
index 3edf0ce8..7191ffe2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "e_metrobus",
-  "version": "1.1.0",
+  "version": "1.2.0",
   "dependencies": {},
   "devDependencies": {
     "autoprefixer": "^9.4.7",