diff --git a/modules/packages.nix b/modules/packages.nix
index a3b1acc..76f2f17 100644
--- a/modules/packages.nix
+++ b/modules/packages.nix
@@ -60,6 +60,9 @@ in {
       (callPackage ./../pkgs/docker-craft-cms-dev-env.nix {
         inherit lib;
       })
+      (callPackage ./../pkgs/toggl-time-grouper/package.nix {
+        inherit lib;
+      })
       (import (fetchTarball
         "https://github.com/cachix/devenv/archive/v0.6.2.tar.gz")).default
       nixpkgs-fmt
diff --git a/pkgs/toggl-time-grouper/package.nix b/pkgs/toggl-time-grouper/package.nix
new file mode 100644
index 0000000..140b8bd
--- /dev/null
+++ b/pkgs/toggl-time-grouper/package.nix
@@ -0,0 +1,7 @@
+{ lib, python3Packages }:
+with python3Packages;
+buildPythonApplication {
+  name = "toggl-time-grouper";
+  src = ./.;
+  propagatedBuildInputs = [ pandas ];
+}
\ No newline at end of file
diff --git a/pkgs/toggl-time-grouper/setup.py b/pkgs/toggl-time-grouper/setup.py
new file mode 100644
index 0000000..11ab99f
--- /dev/null
+++ b/pkgs/toggl-time-grouper/setup.py
@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+
+from distutils.core import setup
+
+setup(
+    name='toggl-time-grouper',
+    version='0.0.1',
+    scripts=['toggl-time-grouper'],
+)
\ No newline at end of file
diff --git a/pkgs/toggl-time-grouper/toggl-time-grouper b/pkgs/toggl-time-grouper/toggl-time-grouper
new file mode 100644
index 0000000..4f8373c
--- /dev/null
+++ b/pkgs/toggl-time-grouper/toggl-time-grouper
@@ -0,0 +1,15 @@
+#!/usr/bin/env python3
+
+import pandas as pd
+import sys
+from pathlib import Path
+
+df = pd.read_csv(sys.argv[1])
+
+df = df.drop(columns=['User', 'Email', 'Billable', 'Tags', 'Amount ()', 'Start time', 'End date', 'End time'])
+df['Duration'] = pd.to_timedelta(df['Duration'])
+df['Start date'] = pd.to_datetime(df['Start date'])
+
+df = df.groupby(['Project','Description','Start date'])['Duration'].sum()
+
+df.to_csv(Path(sys.argv[1]).stem + '-grouped.csv')
\ No newline at end of file