diff --git a/lib/philomena/image_faves.ex b/lib/philomena/image_faves.ex
index 1869dc63..615247f1 100644
--- a/lib/philomena/image_faves.ex
+++ b/lib/philomena/image_faves.ex
@@ -6,8 +6,9 @@ defmodule Philomena.ImageFaves do
   import Ecto.Query, warn: false
   alias Ecto.Multi
 
-  alias Philomena.Images.Image
   alias Philomena.ImageFaves.ImageFave
+  alias Philomena.UserStatistics
+  alias Philomena.Images.Image
 
   @doc """
   Creates a image_hide.
@@ -25,6 +26,9 @@ defmodule Philomena.ImageFaves do
     Multi.new
     |> Multi.insert(:fave, fave)
     |> Multi.update_all(:inc_faves_count, image_query, inc: [faves_count: 1])
+    |> Multi.run(:inc_fave_stat, fn _repo, _changes ->
+      UserStatistics.inc_stat(user, :images_favourited, 1)
+    end)
   end
 
   @doc """
@@ -48,6 +52,8 @@ defmodule Philomena.ImageFaves do
         image_query
         |> repo.update_all(inc: [faves_count: -faves])
 
+      UserStatistics.inc_stat(user, :images_favourited, -faves)
+
       {:ok, count}
     end)
   end
diff --git a/lib/philomena/image_votes.ex b/lib/philomena/image_votes.ex
index 95f38c4a..7998565e 100644
--- a/lib/philomena/image_votes.ex
+++ b/lib/philomena/image_votes.ex
@@ -6,8 +6,9 @@ defmodule Philomena.ImageVotes do
   import Ecto.Query, warn: false
   alias Ecto.Multi
 
-  alias Philomena.Images.Image
   alias Philomena.ImageVotes.ImageVote
+  alias Philomena.UserStatistics
+  alias Philomena.Images.Image
 
   @doc """
   Creates a image_vote.
@@ -28,6 +29,9 @@ defmodule Philomena.ImageVotes do
     Multi.new
     |> Multi.insert(:vote, vote)
     |> Multi.update_all(:inc_vote_count, image_query, inc: [upvotes_count: upvotes, downvotes_count: downvotes, score: upvotes - downvotes])
+    |> Multi.run(:inc_vote_stat, fn _repo, _changes ->
+      UserStatistics.inc_stat(user, :votes_cast, 1)
+    end)
   end
 
   @doc """
@@ -59,6 +63,8 @@ defmodule Philomena.ImageVotes do
         image_query
         |> repo.update_all(inc: [upvotes_count: -upvotes, downvotes_count: -downvotes, score: downvotes - upvotes])
 
+      UserStatistics.inc_stat(user, :votes_cast, -(upvotes + downvotes))
+
       {:ok, count}
     end)
   end
diff --git a/lib/philomena/user_statistics.ex b/lib/philomena/user_statistics.ex
index a476a689..6f32ec19 100644
--- a/lib/philomena/user_statistics.ex
+++ b/lib/philomena/user_statistics.ex
@@ -7,53 +7,7 @@ defmodule Philomena.UserStatistics do
   alias Philomena.Repo
 
   alias Philomena.UserStatistics.UserStatistic
-
-  @doc """
-  Returns the list of user_statistics.
-
-  ## Examples
-
-      iex> list_user_statistics()
-      [%UserStatistic{}, ...]
-
-  """
-  def list_user_statistics do
-    Repo.all(UserStatistic)
-  end
-
-  @doc """
-  Gets a single user_statistic.
-
-  Raises `Ecto.NoResultsError` if the User statistic does not exist.
-
-  ## Examples
-
-      iex> get_user_statistic!(123)
-      %UserStatistic{}
-
-      iex> get_user_statistic!(456)
-      ** (Ecto.NoResultsError)
-
-  """
-  def get_user_statistic!(id), do: Repo.get!(UserStatistic, id)
-
-  @doc """
-  Creates a user_statistic.
-
-  ## Examples
-
-      iex> create_user_statistic(%{field: value})
-      {:ok, %UserStatistic{}}
-
-      iex> create_user_statistic(%{field: bad_value})
-      {:error, %Ecto.Changeset{}}
-
-  """
-  def create_user_statistic(attrs \\ %{}) do
-    %UserStatistic{}
-    |> UserStatistic.changeset(attrs)
-    |> Repo.insert()
-  end
+  alias Philomena.Users.User
 
   @doc """
   Updates a user_statistic.
@@ -67,38 +21,29 @@ defmodule Philomena.UserStatistics do
       {:error, %Ecto.Changeset{}}
 
   """
-  def update_user_statistic(%UserStatistic{} = user_statistic, attrs) do
-    user_statistic
-    |> UserStatistic.changeset(attrs)
-    |> Repo.update()
-  end
+  def inc_stat(user, action, amount \\ 1)
 
-  @doc """
-  Deletes a UserStatistic.
+  def inc_stat(nil, _action, _amount), do: {:ok, nil}
+  def inc_stat(%{id: user_id}, action, amount)
+    when action in [:uploads, :images_favourited, :comments_posted, :votes_cast, :metadata_updates, :forum_posts]
+  do
+    now =
+      DateTime.utc_now()
+      |> DateTime.to_unix(:second)
+      |> div(86400)
 
-  ## Examples
+    user = User |> where(id: ^user_id)
+    action_count = :"#{action}_count"
 
-      iex> delete_user_statistic(user_statistic)
-      {:ok, %UserStatistic{}}
+    run = fn ->
+      Repo.update_all(user, inc: [{action_count, amount}])
+      Repo.insert(
+        Map.put(%UserStatistic{day: now, user_id: user_id}, action, amount),
+        on_conflict: [inc: [{action, amount}]],
+        conflict_target: [:day, :user_id]
+      )
+    end
 
-      iex> delete_user_statistic(user_statistic)
-      {:error, %Ecto.Changeset{}}
-
-  """
-  def delete_user_statistic(%UserStatistic{} = user_statistic) do
-    Repo.delete(user_statistic)
-  end
-
-  @doc """
-  Returns an `%Ecto.Changeset{}` for tracking user_statistic changes.
-
-  ## Examples
-
-      iex> change_user_statistic(user_statistic)
-      %Ecto.Changeset{source: %UserStatistic{}}
-
-  """
-  def change_user_statistic(%UserStatistic{} = user_statistic) do
-    UserStatistic.changeset(user_statistic, %{})
+    Repo.transaction(run)
   end
 end
diff --git a/lib/philomena/user_statistics/user_statistic.ex b/lib/philomena/user_statistics/user_statistic.ex
index c0dbeda4..27af1b68 100644
--- a/lib/philomena/user_statistics/user_statistic.ex
+++ b/lib/philomena/user_statistics/user_statistic.ex
@@ -4,6 +4,7 @@ defmodule Philomena.UserStatistics.UserStatistic do
 
   alias Philomena.Users.User
 
+  # fixme: rekey this on (user_id, day)
   schema "user_statistics" do
     belongs_to :user, User
     field :day, :integer, default: 0
@@ -18,7 +19,9 @@ defmodule Philomena.UserStatistics.UserStatistic do
   @doc false
   def changeset(user_statistic, attrs) do
     user_statistic
-    |> cast(attrs, [])
-    |> validate_required([])
+    |> cast(attrs, [
+      :uploads, :votes_cast, :comments_posted, :metadata_updates,
+      :images_favourited, :forum_posts
+    ])
   end
 end
diff --git a/lib/philomena_web/controllers/image/comment_controller.ex b/lib/philomena_web/controllers/image/comment_controller.ex
index 661aadb7..a0e5184e 100644
--- a/lib/philomena_web/controllers/image/comment_controller.ex
+++ b/lib/philomena_web/controllers/image/comment_controller.ex
@@ -2,6 +2,7 @@ defmodule PhilomenaWeb.Image.CommentController do
   use PhilomenaWeb, :controller
 
   alias Philomena.{Images.Image, Comments.Comment, Textile.Renderer}
+  alias Philomena.UserStatistics
   alias Philomena.Comments
   alias Philomena.Images
   alias Philomena.Repo
@@ -69,6 +70,7 @@ defmodule PhilomenaWeb.Image.CommentController do
         Comments.notify_comment(comment)
         Comments.reindex_comment(comment)
         Images.reindex_image(conn.assigns.image)
+        UserStatistics.inc_stat(conn.assigns.current_user, :comments_posted)
 
         conn
         |> put_flash(:info, "Comment created successfully.")
diff --git a/lib/philomena_web/controllers/image/fave_controller.ex b/lib/philomena_web/controllers/image/fave_controller.ex
index c36eab8b..af707f73 100644
--- a/lib/philomena_web/controllers/image/fave_controller.ex
+++ b/lib/philomena_web/controllers/image/fave_controller.ex
@@ -20,7 +20,7 @@ defmodule PhilomenaWeb.Image.FaveController do
     )
     |> Multi.append(ImageVotes.delete_vote_transaction(image, user))
     |> Multi.append(ImageVotes.create_vote_transaction(image, user, true))
-    |> Repo.transaction()
+    |> Repo.isolated_transaction(:serializable)
     |> case do
       {:ok, _result} ->
         image =
@@ -42,7 +42,7 @@ defmodule PhilomenaWeb.Image.FaveController do
     image = conn.assigns.image
 
     ImageFaves.delete_fave_transaction(image, user)
-    |> Repo.transaction()
+    |> Repo.isolated_transaction(:serializable)
     |> case do
       {:ok, _result} ->
         image =
diff --git a/lib/philomena_web/controllers/image/source_controller.ex b/lib/philomena_web/controllers/image/source_controller.ex
index 60b6146f..97351656 100644
--- a/lib/philomena_web/controllers/image/source_controller.ex
+++ b/lib/philomena_web/controllers/image/source_controller.ex
@@ -1,8 +1,9 @@
 defmodule PhilomenaWeb.Image.SourceController do
   use PhilomenaWeb, :controller
 
-  alias Philomena.Images
+  alias Philomena.UserStatistics
   alias Philomena.Images.Image
+  alias Philomena.Images
 
   plug PhilomenaWeb.FilterBannedUsersPlug
   plug PhilomenaWeb.CaptchaPlug
@@ -19,6 +20,8 @@ defmodule PhilomenaWeb.Image.SourceController do
         changeset =
           Images.change_image(image)
 
+        UserStatistics.inc_stat(conn.assigns.current_user, :metadata_updates)
+
         conn
         |> put_view(PhilomenaWeb.ImageView)
         |> render("_source.html", layout: false, image: image, changeset: changeset)
diff --git a/lib/philomena_web/controllers/image/tag_controller.ex b/lib/philomena_web/controllers/image/tag_controller.ex
index 9f0c9a89..35406a59 100644
--- a/lib/philomena_web/controllers/image/tag_controller.ex
+++ b/lib/philomena_web/controllers/image/tag_controller.ex
@@ -1,8 +1,9 @@
 defmodule PhilomenaWeb.Image.TagController do
   use PhilomenaWeb, :controller
 
-  alias Philomena.Images
+  alias Philomena.UserStatistics
   alias Philomena.Images.Image
+  alias Philomena.Images
   alias Philomena.Tags
   alias Philomena.Repo
 
@@ -20,6 +21,7 @@ defmodule PhilomenaWeb.Image.TagController do
       {:ok, %{image: {image, added_tags, removed_tags}}} ->
         Images.reindex_image(image)
         Tags.reindex_tags(added_tags ++ removed_tags)
+        UserStatistics.inc_stat(conn.assigns.current_user, :metadata_updates)
 
         image =
           image
diff --git a/lib/philomena_web/controllers/image/vote_controller.ex b/lib/philomena_web/controllers/image/vote_controller.ex
index 8b9da65a..6e465fd0 100644
--- a/lib/philomena_web/controllers/image/vote_controller.ex
+++ b/lib/philomena_web/controllers/image/vote_controller.ex
@@ -18,7 +18,7 @@ defmodule PhilomenaWeb.Image.VoteController do
       ImageVotes.delete_vote_transaction(image, user),
       ImageVotes.create_vote_transaction(image, user, params["up"] == true)
     )
-    |> Repo.transaction()
+    |> Repo.isolated_transaction(:serializable)
     |> case do
       {:ok, _result} ->
         image =
@@ -40,7 +40,7 @@ defmodule PhilomenaWeb.Image.VoteController do
     image = conn.assigns.image
 
     ImageVotes.delete_vote_transaction(image, user)
-    |> Repo.transaction()
+    |> Repo.isolated_transaction(:serializable)
     |> case do
       {:ok, _result} ->
         image =
diff --git a/lib/philomena_web/controllers/image_controller.ex b/lib/philomena_web/controllers/image_controller.ex
index 5dba4d21..87a95246 100644
--- a/lib/philomena_web/controllers/image_controller.ex
+++ b/lib/philomena_web/controllers/image_controller.ex
@@ -5,6 +5,7 @@ defmodule PhilomenaWeb.ImageController do
   alias PhilomenaWeb.NotificationCountPlug
   alias Philomena.{Images, Images.Image, Comments.Comment, Galleries.Gallery, Galleries.Interaction, Textile.Renderer}
   alias Philomena.Servers.ImageProcessor
+  alias Philomena.UserStatistics
   alias Philomena.Interactions
   alias Philomena.Comments
   alias Philomena.Tags
@@ -104,6 +105,7 @@ defmodule PhilomenaWeb.ImageController do
         ImageProcessor.cast(image.id)
         Images.reindex_image(image)
         Tags.reindex_tags(image.added_tags)
+        UserStatistics.inc_stat(conn.assigns.current_user, :uploads)
 
         conn
         |> put_flash(:info, "Image created successfully.")
diff --git a/lib/philomena_web/controllers/topic/post_controller.ex b/lib/philomena_web/controllers/topic/post_controller.ex
index 20500bf7..a90e2d4f 100644
--- a/lib/philomena_web/controllers/topic/post_controller.ex
+++ b/lib/philomena_web/controllers/topic/post_controller.ex
@@ -2,6 +2,7 @@ defmodule PhilomenaWeb.Topic.PostController do
   use PhilomenaWeb, :controller
 
   alias Philomena.{Forums.Forum, Topics.Topic, Posts}
+  alias Philomena.UserStatistics
   alias Philomena.Repo
 
   plug PhilomenaWeb.FilterBannedUsersPlug
@@ -19,6 +20,7 @@ defmodule PhilomenaWeb.Topic.PostController do
       {:ok, %{post: post}} ->
         Posts.notify_post(post)
         Posts.reindex_post(post)
+        UserStatistics.inc_stat(conn.assigns.current_user, :forum_posts)
 
         conn
         |> put_flash(:info, "Post created successfully.")
diff --git a/priv/repo/structure.sql b/priv/repo/structure.sql
index cefedd19..fb2c7c15 100644
--- a/priv/repo/structure.sql
+++ b/priv/repo/structure.sql
@@ -2,8 +2,8 @@
 -- PostgreSQL database dump
 --
 
--- Dumped from database version 11.5 (Debian 11.5-1.pgdg100+1)
--- Dumped by pg_dump version 11.5 (Debian 11.5-1.pgdg100+1)
+-- Dumped from database version 12.1 (Debian 12.1-1.pgdg100+1)
+-- Dumped by pg_dump version 12.1 (Debian 12.1-1.pgdg90+1)
 
 SET statement_timeout = 0;
 SET lock_timeout = 0;
@@ -18,7 +18,7 @@ SET row_security = off;
 
 SET default_tablespace = '';
 
-SET default_with_oids = false;
+SET default_table_access_method = heap;
 
 --
 -- Name: adverts; Type: TABLE; Schema: public; Owner: -
@@ -3743,6 +3743,13 @@ CREATE INDEX index_user_name_changes_on_user_id ON public.user_name_changes USIN
 CREATE INDEX index_user_statistics_on_user_id ON public.user_statistics USING btree (user_id);
 
 
+--
+-- Name: index_user_statistics_on_user_id_and_day; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE UNIQUE INDEX index_user_statistics_on_user_id_and_day ON public.user_statistics USING btree (user_id, day);
+
+
 --
 -- Name: index_user_whitelists_on_user_id; Type: INDEX; Schema: public; Owner: -
 --