diff --git a/README.md b/README.md
index 08ebdfa..f80e41e 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Some links are available to [related resources](#resources).
 
 # Summary
 
-* Apps/tools covered: **1391**
+* Apps/tools covered: **1392**
 * Number of categories: **76**.
 
 # Index
@@ -28,7 +28,7 @@ Some links are available to [related resources](#resources).
 * [RSS](#rss) (10), [Religion](#religion) (4)
 * [Science](#science) (19), [Screen recorder](#screen-recorder) (10), [Screen savers](#screensaver) (4), [Security and encryption](#security) (31), [Shells](#shells) (14), [Sound and music](#music) (46), [System monitoring](#monitor) (28), [System tools](#system) (24)
 * [Terminals](#terminal) (14), [Text processing](#text-processing) (33), [Text search (alternatives to grep)](#text-search) (11), [Text search and replace (alternatives to sed)](#text-search-replace) (6), [Time trackers](#time-tracker) (15), [Todo managers](#todo-manager) (30), [Torrent](#torrent) (7), [Typing test and practice](#typing) (8)
-* [Utilities](#utility) (37)
+* [Utilities](#utility) (38)
 * [Versioning](#versioning) (8), [Video](#video) (11), [Viewers](#viewers) (26)
 * [Web browser](#browser) (18), [Web development](#webdev) (28), [Writing](#writing) (9)
 
@@ -1662,6 +1662,7 @@ Miscellaneous utilities that are not do not fit in other categories and they are
 * [Python re(gex)? exercises](https://github.com/learnbyexample/TUI-apps/tree/main/PyRegexExercises) - TUI application intended to help you practice Python regular expressions there are more than 100 exercises covering both the builtin re and third-party regex module.
 * [sasqwatch](https://github.com/fabio42/sasqwatch) - A modern take on the classic watch command.
 * [sauce](https://github.com/cadecuddy/sauce) - A novelty CLI tool that identifies an anime from an image and yields key data about it.
+* [sizeof](https://github.com/zackproser/sizeof) - Experimental CLI, written alongside ChatGPT4 and GItHub Copilot.
 * [Skylab](https://github.com/SerhiiStets/skylab) - A text user interface (TUI) tool that displays upcoming space launches in a user-friendly way.
 * [sprinkles](https://github.com/KhalilOuali/sprinkles) - Randomly colors input text and outputs it to the terminal.
 * [teetail](https://github.com/sl236/teetail) - Like tee, but only the tail goes in the file.
diff --git a/data/apps.csv b/data/apps.csv
index 742e03d..01c2007 100644
--- a/data/apps.csv
+++ b/data/apps.csv
@@ -1390,3 +1390,4 @@ office,pysentation,,https://github.com/mimseyedi/pysentation,pysentation is a CL
 data-management-tabular,qsv,,https://github.com/jqnatividad/qsv,"CSVs sliced, diced & analyzed."
 monitor,s-tui,,https://github.com/amanusk/s-tui,Terminal-based CPU stress and monitoring utility.
 chat,scli,,https://github.com/isamert/scli,A simple terminal user interface for signal messenger.
+utility,sizeof,,https://github.com/zackproser/sizeof,"Experimental CLI, written alongside ChatGPT4 and GItHub Copilot."