diff --git a/src/web/tracker/admin.py b/src/web/tracker/admin.py
index 8c38f3f..0bdd83d 100644
--- a/src/web/tracker/admin.py
+++ b/src/web/tracker/admin.py
@@ -1,3 +1,8 @@
 from django.contrib import admin
+from .models import Game, Purchase, Platform, Session
 
 # Register your models here.
+admin.site.register(Game)
+admin.site.register(Purchase)
+admin.site.register(Platform)
+admin.site.register(Session)
diff --git a/src/web/tracker/models.py b/src/web/tracker/models.py
index b18867c..8ac5375 100644
--- a/src/web/tracker/models.py
+++ b/src/web/tracker/models.py
@@ -1,4 +1,5 @@
 from django.db import models
+from datetime import timedelta
 
 
 class Game(models.Model):
@@ -31,12 +32,20 @@ class Session(models.Model):
     purchase = models.ForeignKey("Purchase", on_delete=models.CASCADE)
     timestamp_start = models.DateTimeField()
     timestamp_end = models.DateTimeField()
-    duration_manual = models.DurationField(blank=True, null=True)
+    duration_manual = models.DurationField(blank=True, null=True, default=timedelta(0))
     duration_calculated = models.DurationField(blank=True, null=True)
     note = models.TextField(blank=True, null=True)
 
     def __str__(self):
-        return self.purchase
+        mark = ", manual" if self.duration_manual != None else ""
+        return f"{str(self.purchase)} {str(self.timestamp_start.date())} ({self.total_duration()}{mark})"
 
     def calculated_duration(self):
         return self.timestamp_end - self.timestamp_start
+
+    def total_duration(self):
+        return (
+            self.calculated_duration()
+            if self.duration_manual == None
+            else self.duration_manual + self.calculated_duration()
+        )
diff --git a/src/web/web/urls.py b/src/web/web/urls.py
index b9a58e8..33d8170 100644
--- a/src/web/web/urls.py
+++ b/src/web/web/urls.py
@@ -19,6 +19,7 @@ from django.views.generic import RedirectView
 
 
 urlpatterns = [
+    path("admin/", admin.site.urls),
     path("", RedirectView.as_view(url="/tracker/list-sessions")),
     path("tracker/", include("tracker.urls")),
 ]