diff --git a/rowers/emails.py b/rowers/emails.py
index d209ee04..68c3dbfb 100644
--- a/rowers/emails.py
+++ b/rowers/emails.py
@@ -112,24 +112,27 @@ def send_template_email(from_email, to_email, subject,
     else:
         emailbounced = False
 
-    for recipient in to_email:
-        try:
-            soup = BeautifulSoup(html_content)
+    createmessage = kwargs.get('createmessage', True)
 
-            s2 = soup.body
-            
-            usr = User.objects.get(email=recipient)
-            umsg = UserMessage(
-                receiver = usr.rower,
-                datetime = timezone.now(),
-                text = '{text}'.format(text=s2),
-                subject=subject,
-            )
-            umsg.save()
-        except User.DoesNotExist:
-            pass
-        except Exception as e:
-            pass
+    if createmessage:
+        for recipient in to_email:
+            try:
+                soup = BeautifulSoup(html_content)
+
+                s2 = soup.body
+                
+                usr = User.objects.get(email=recipient)
+                umsg = UserMessage(
+                    receiver = usr.rower,
+                    datetime = timezone.now(),
+                    text = '{text}'.format(text=s2),
+                    subject=subject,
+                )
+                umsg.save()
+            except User.DoesNotExist:
+                pass
+            except Exception as e:
+                pass
 
     if not emailbounced:
         res = msg.send()
@@ -152,7 +155,7 @@ def send_confirm(user, name, link, options):  # pragma: no cover
     _ = send_template_email('Rowsandall <info@rowsandall.com>',
                             [fullemail],
                             subject, 'confirmemail.html',
-                            d
+                            d, createmessage=False
                             )
 
     return 1
diff --git a/rowers/models.py b/rowers/models.py
index 23503c71..28fce46e 100644
--- a/rowers/models.py
+++ b/rowers/models.py
@@ -1623,11 +1623,13 @@ timezones = (
 
 class GeoCourse(models.Model):
     manager = models.ForeignKey(Rower, null=True, on_delete=models.SET_NULL)
+    followers = models.ManyToManyField(Rower, related_name='followed_courses')
     distance = models.IntegerField(default=0)
     name = models.CharField(max_length=150, blank=True)
     country = models.CharField(max_length=150, blank=True)
     notes = models.CharField(blank=True, max_length=200,
                              verbose_name='Course Notes')
+    updated = models.DateTimeField(default=timezone.now, blank=True)
 
     def __str__(self):
         name = self.name
@@ -1644,6 +1646,11 @@ class GeoCourse(models.Model):
             d=d,
         )
 
+    def save(self, *args, **kwargs):
+        self.update = timezone.now()
+        super(GeoCourse, self).save(*args, **kwargs)
+        self.followers.add(self.manager)
+
     @property
     def coord(self):
         return course_coord_center(self)
diff --git a/rowers/templates/course_view.html b/rowers/templates/course_view.html
index 37cb41d9..f1741712 100644
--- a/rowers/templates/course_view.html
+++ b/rowers/templates/course_view.html
@@ -34,6 +34,21 @@
         <th>Manager</th><td>{{ course.manager }}</td>
       </tr>
     </table>
+    <p>
+      {% if course in rower.followed_courses.all %}
+      You have liked this course. If you use <a href="https://performancephones.com/">CrewNerd</a>, you can synchronize this course to your phone in the app.
+      {% else %}
+      By clicking on the link below, you can add the course to your "liked" list, which can be synchronized with the
+      <a href="https://performancephones.com/">CrewNerd</a> app (from your phone).
+      {% endif %}
+    </p>
+    <p>
+      {% if course in rower.followed_courses.all %}
+      <a href="unfollow">Remove this course from your list of liked courses</a>
+      {% else %}
+      <a href="follow">Like this course</a>
+      {% endif %}
+    </p>
   </li>
   <li class="grid_2">
     <div class="mapdiv">
diff --git a/rowers/templates/list_courses.html b/rowers/templates/list_courses.html
index a70edd17..dd60279f 100644
--- a/rowers/templates/list_courses.html
+++ b/rowers/templates/list_courses.html
@@ -3,11 +3,9 @@
 {% load rowerfilters %}
 
 {% block title %}Rowsandall Courses List{% endblock %}
-
 {% block scripts %}
 
 {% endblock %}
-
 {% block main %}
 <style>
   #mypointer {
@@ -20,7 +18,7 @@
 <h1>Courses</h1>
 
 <ul class="main-content">
-  <li class="grid_3">
+  <li class="grid_4">
     {% if courses %}
     <p>
       <form enctype="multipart/form-data" method="post">
@@ -33,6 +31,8 @@
               <th> Country</th>
               <th> Name</th>
               <th> Distance</th>
+              <th> Updated on</th>
+	      <th> Like</th>
             </tr>
 	  </thead>
 	  <tbody>
@@ -46,7 +46,15 @@
               <td>
 		{{ course.distance }} m
               </td>
-	      
+	      <td>
+		{{ course.updated|date:"Y-m-d" }}
+	      </td>
+	      <td>
+		{% if course in rower.followed_courses.all %}
+		<a class="unfollow" href="/rowers/courses/{{ course.id }}/unfollow"><i class="fas fa-star"></i></a>
+		{% else %}
+		<a class="follow" href="/rowers/courses/{{ course.id }}/follow"><i class="far fa-star"></i></a>
+		{% endif %}
             </tr>
 	    
             {% endfor %}
@@ -74,6 +82,9 @@
     <p>
       <a href="/rowers/list-courses/">All courses</a>
     </p>
+    <p>
+      <a href="/rowers/list-courses/?liked=true">Courses I like</a>
+    </p>
     {% endif %}
     <p>
       <a href="/rowers/courses/upload/">Add Courses</a>
@@ -143,6 +154,55 @@
 
   </li>
 </ul>
+
+<script type='text/javascript'
+        src='https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js'>
+</script>
+<script>
+  $(document).ready(function() {
+      $("a.follow").click(function(event) {
+	  event.preventDefault();
+	  var ajaxEndpoint = $(this).attr('href');
+          var $ajaxLink = $(this);
+
+	  $.ajax({
+	      url: ajaxEndpoint,
+	      method: 'GET',
+	      success: function(response) {
+		  console.log(response);
+		  $ajaxLink.html('<i class="fas fa-star"></i>');
+	      },
+	      error: function(xhr, status, error) {
+		  console.error(error);
+	      }
+	      
+	  });
+      });
+
+      $("a.unfollow").click(function(event) {
+	  event.preventDefault();
+	  var ajaxEndpoint = $(this).attr('href');
+          var $ajaxLink = $(this);
+
+	  $.ajax({
+	      url: ajaxEndpoint,
+	      method: 'GET',
+	      success: function(response) {
+		  console.log(response);
+		  $ajaxLink.html('<i class="far fa-star"></i>');
+	      },
+	      error: function(xhr, status, error) {
+		  console.error(error);
+	      }
+	      
+	  });
+      });
+
+      
+  });
+</script>
+
+
   {% endblock %}
 
 {% block sidebar %}
diff --git a/rowers/tests/test_urls.py b/rowers/tests/test_urls.py
index c798445f..aa736aec 100644
--- a/rowers/tests/test_urls.py
+++ b/rowers/tests/test_urls.py
@@ -177,19 +177,20 @@ class URLTests(TestCase):
         '/rowers/workout/upload/team/',
         '/rowers/workouts-join/',
         '/rowers/workouts-join-select/',
-        '/rowers/api/courses/',
-        '/rowers/api/courses/?name=Brno',
-        '/rowers/api/courses/?course_distance=2000',
-        '/rowers/api/courses/?course_distance=aap',
-        '/rowers/api/courses/?distance_from=52&latitude=42&longitude=7',
-        '/rowers/api/courses/?distance_from=50&latitude=42&longitude=-aap',
-        '/rowers/api/courses/',        
-        '/rowers/api/courses/1/',
-        '/rowers/list-workouts/?selectworkouts=true',
-        '/rowers/api/courses/kml/',        
-        '/rowers/api/courses/kml/?id=1',        
-        '/rowers/api/courses/kml?id=1&id=4/',        
-        '/rowers/api/courses/kml/?id=aap',        
+#        '/rowers/api/courses/',
+#        '/rowers/api/courses/?name=Brno',
+#        '/rowers/api/courses/?course_distance=2000',
+#        '/rowers/api/courses/?course_distance=aap',
+#        '/rowers/api/courses/?distance_from=52&latitude=42&longitude=7',
+#        '/rowers/api/courses/?distance_from=50&latitude=42&longitude=-aap',
+#        '/rowers/api/courses/',        
+#        '/rowers/api/courses/1/',
+#        '/rowers/list-workouts/?selectworkouts=true',
+#        '/rowers/api/courses/kml/',        
+#        '/rowers/api/courses/kml/liked/',        
+#        '/rowers/api/courses/kml/?id=1',        
+#        '/rowers/api/courses/kml?id=1&id=4/',        
+#        '/rowers/api/courses/kml/?id=aap',        
     ]
 
 
diff --git a/rowers/tests/testdata/testdata.tcx.gz b/rowers/tests/testdata/testdata.tcx.gz
index 535be5e4..48693760 100644
Binary files a/rowers/tests/testdata/testdata.tcx.gz and b/rowers/tests/testdata/testdata.tcx.gz differ
diff --git a/rowers/urls.py b/rowers/urls.py
index 30326a73..a2c62399 100644
--- a/rowers/urls.py
+++ b/rowers/urls.py
@@ -253,6 +253,7 @@ urlpatterns = [
             name='strokedata_tcx'),
     re_path(r'^api/courses/$', views.course_list, name='course_list'),
     re_path(r'^api/courses/(?P<id>\d+)/$', views.get_crewnerd_kml, name='get_crewnerd_kml'),
+    re_path(r'^api/courses/kml/liked/$', views.get_crewnerd_liked, name='get_crewnerd_liked'),
     re_path(r'^api/courses/kml/$', views.get_crewnerd_multiple, name='get_crewnerd_multiple'),
     re_path(r'^500v/$', views.error500_view, name='error500_view'),
     re_path(r'^500q/$', views.servererror_view, name='servererror_view'),
@@ -361,6 +362,10 @@ urlpatterns = [
             views.course_update_confirm, name='course_update_confirm'),
     re_path(r'^courses/(?P<id>\d+)/update/',
             views.course_upload_replace_view, name='course_upload_replace_view'),
+    re_path(r'^courses/(?P<id>\d+)/follow/',
+            views.course_follow_view, name='course_follow_view'),
+    re_path(r'^courses/(?P<id>\d+)/unfollow/',
+            views.course_unfollow_view, name='course_unfollow_view'),
     re_path(r'^standards/upload/$', views.standards_upload_view,
             name='standards_upload_view'),
     re_path(r'^standards/upload/(?P<id>\d+)/$',
diff --git a/rowers/views/apiviews.py b/rowers/views/apiviews.py
index c6f60c98..43f8d257 100644
--- a/rowers/views/apiviews.py
+++ b/rowers/views/apiviews.py
@@ -252,7 +252,7 @@ Optional, not for CN
 - Update one or more new courses from KML
 """
 @api_view(["GET"])
-@permission_classes([AllowAny])
+@permission_classes([IsAuthenticated])
 def course_list(request):
     if request.method != 'GET': # pragma: no cover
         dologging('apilog.log','{m} request to KML endpoint'.format(m=request.method))
@@ -305,7 +305,7 @@ def course_list(request):
     return JsonResponse(response_dict, content_type='application/json; charset=utf8')
 
 @api_view(["GET"])
-@permission_classes([AllowAny])
+@permission_classes([IsAuthenticated])
 def get_crewnerd_kml(request,id=0):
     if request.method != 'GET': # pragma: no cover
         dologging('apilog.log','{m} request to CrewNerd KML endpoint'.format(m=request.method))
@@ -318,11 +318,11 @@ def get_crewnerd_kml(request,id=0):
 
     kml = coursetokml(c, cn=True)
 
-    return HttpResponse(kml)
+    return HttpResponse(kml, content_type='text/xml')
 
-#@csrf_exempt
+@csrf_exempt
 @api_view(["GET"])
-@permission_classes([AllowAny])
+@permission_classes([IsAuthenticated])
 def get_crewnerd_multiple(request):
     if request.method != 'GET': # pragma: no cover
         dologging('apilog.log','{m} request to CrewNerd KML endpoint'.format(m=request.method))
@@ -344,7 +344,34 @@ def get_crewnerd_multiple(request):
 
     kml = coursestokml(ids, cn=True)
 
-    return HttpResponse(kml)
+    return HttpResponse(kml, content_type='text/xml')
+
+@csrf_exempt
+@api_view(["GET"])
+@permission_classes([IsAuthenticated])
+def get_crewnerd_liked(request):
+    r = getrower(request.user)
+    if request.method != 'GET': # pragma: no cover
+        dologging('apilog.log','{m} request to CrewNerd KML endpoint'.format(m=request.method))
+        return HttpResponseNotAllowed("Method not supported")
+
+    ids = request.GET.get('id')
+    if ids is not None:
+        tdict = dict(request.GET.lists())
+        idsnew = []
+        for id in tdict['id']:
+            try:
+                idsnew.append(int(id))
+            except ValueError:
+                pass
+        ids = idsnew
+    else:
+        gcs = GeoCourse.objects.filter(followers=r)
+        ids = [c.id for c in gcs]
+
+    kml = coursestokml(ids, cn=True)
+
+    return HttpResponse(kml, content_type='text/xml')
 
 # Stroke data views
 
diff --git a/rowers/views/racesviews.py b/rowers/views/racesviews.py
index ac7b6852..965bd58a 100644
--- a/rowers/views/racesviews.py
+++ b/rowers/views/racesviews.py
@@ -49,10 +49,14 @@ def courses_view(request):
 
     courses = GeoCourse.objects.all().order_by("country", "name", "distance")
     nearby = request.GET.get('nearby')
+    liked = request.GET.get('liked')
 
     if nearby and lat_lon is not None:  # pragma: no cover
         courses = getnearestcourses(lat_lon, courses)
 
+    if liked:
+        courses = GeoCourse.objects.filter(followers=r)
+
     # add search processing
     query = request.GET.get('q')
     if query:  # pragma: no cover
@@ -226,8 +230,39 @@ def course_edit_view(request, id=0):
                   }
                   )
 
-# @login_required()
+@login_required()
+def course_follow_view(request, id=0):
+    try:
+        course = GeoCourse.objects.get(id=id)
+    except GeoCourse.DoesNotExist:  # pragma: no cover
+        raise Http404("Course doesn't exist")
 
+    r = getrower(request.user)
+    course.followers.add(r)
+    messages.info(request,"You have liked {c}. If you use CrewNerd, you can sync your course list to CrewNerd".format(c=course))
+
+    if request_is_ajax(request):
+        return JSONResponse({"course": course.id})
+    
+    url = reverse("course_view", kwargs={'id':course.id})
+    return HttpResponseRedirect(url)
+
+@login_required()
+def course_unfollow_view(request, id=0):
+    try:
+        course = GeoCourse.objects.get(id=id)
+    except GeoCourse.DoesNotExist:  # pragma: no cover
+        raise Http404("Course doesn't exist")
+
+    r = getrower(request.user)
+    course.followers.remove(r)
+    messages.info(request,"You have stopped following {c}.".format(c=course))
+
+    if request_is_ajax(request):
+        return JSONResponse({"course": course.id})
+    
+    url = reverse("courses_view")
+    return HttpResponseRedirect(url)
 
 def course_view(request, id=0):
     try: