diff --git a/README.md b/README.md
index d8147be..8b8b8d3 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ If you prefer an email, contact me at `toolleeo@gmail.com`.
 
 # Summary
 
-* Apps/tools covered: **1104**
+* Apps/tools covered: **1105**
 * Number of categories: **66**.
 
 # Index
@@ -40,7 +40,7 @@ If you prefer an email, contact me at `toolleeo@gmail.com`.
 * [Anki, decks and flashcards](#flashcard) (6)
 * [Backup](#backup) (16)
 * [Calculators](#calc) (9), [Chat and instant messaging](#chat) (26), [ChatGPT / AI](#chatgpt) (9), [Clean up of files and directories](#file-dir-cleanup) (12), [Co-pilot](#copilot) (7), [Command launchers](#launcher) (18), [Commands cheatsheet and snippets](#cheatsheet) (14), [Conversion](#conversion) (10)
-* [Data management](#data-management) (25), [Data management - Tabular data](#data-management-tabular) (17), [Data transfer](#transfer) (32), [DevOps](#devops) (9), [Diff](#diff) (9), [Directory changers (alternatives to cd)](#cd) (17), [Disk usage analyzers](#disk-analyzer) (12)
+* [Data management](#data-management) (25), [Data management - Tabular data](#data-management-tabular) (17), [Data transfer](#transfer) (32), [DevOps](#devops) (9), [Diff](#diff) (10), [Directory changers (alternatives to cd)](#cd) (17), [Disk usage analyzers](#disk-analyzer) (12)
 * [Editors](#editors) (25), [Email](#email) (13)
 * [File and file system handling](#file-handling) (20), [File deletion and trash bin (alternatives to rm)](#rm) (5), [File explorer and tree visualization](#file-explorer) (10), [File finding (alternatives to find)](#find) (6), [File listing (alternatives to ls)](#ls) (7), [File manager](#file-manager) (18), [File renamers](#file-renamer) (11), [File systems](#file-system) (4), [Financial tools](#financial) (11), [Font management](#font) (2), [Funny tools](#funny) (27), [Fuzzy finders](#fuzzy-finder) (10)
 * [Games](#games) (43), [Git and accessories](#git) (40), [Graphics](#graphics) (31)
@@ -341,6 +341,7 @@ File and data diffs, more or less “context” or “semantic” aware.
 * [diff2html-cli](https://github.com/rtfpessoa/diff2html-cli) - Parse git diffs as JSON and generate pretty HTML.
 * [Difftastic](https://github.com/Wilfred/difftastic) - Syntax-aware structured diff tool.
 * [Dirdiff](https://github.com/OCamlPro/dirdiff) - Efficiently compute the differences between two directories.
+* [dyff](https://github.com/homeport/dyff) - A diff tool for YAML files, and sometimes JSON.
 * [leven-cli](https://github.com/sindresorhus/leven-cli) - Measure the difference between two strings using the Levenshtein distance algorithm.
 * [pdf-diff](https://github.com/serhack/pdf-diff) - A tool for visualizing differences between two pdf files. Mainly dedicated to editors that usually spends a lot of hours on several pdf.
 * [ydiff](https://github.com/ymattw/ydiff) - View colored, incremental diff.
diff --git a/data/apps.csv b/data/apps.csv
index 7809797..68207b5 100644
--- a/data/apps.csv
+++ b/data/apps.csv
@@ -1103,3 +1103,4 @@ text-processing,gtree,,https://github.com/ddddddO/gtree,"Using either Markdown o
 data-management,gron,,https://github.com/tomnomnom/gron,gron transforms JSON into discrete assignments to make it easier to grep for what you want and see the absolute 'path' to it.
 file-handling,shbin,,https://github.com/Shiphero/shbin/,"Upload code snippets, notebooks, images or any other content to a Github repository that acts as your internal pastebin, and returns the URL to share it with your team."
 file-explorer,tere,,https://github.com/mgunyho/tere,Terminal file explorer that is a faster alternative to using cd and ls to browse folders in your terminal.
+diff,dyff,,https://github.com/homeport/dyff,"A diff tool for YAML files, and sometimes JSON."