diff --git a/README.md b/README.md
index 97bfa72..86f7c97 100644
--- a/README.md
+++ b/README.md
@@ -32,11 +32,11 @@ If you prefer an email, contact me at `toolleeo@gmail.com`.
 
 # Summary
 
-To date, **792** apps/tools covered, divided in **43** categories.
+To date, **793** apps/tools covered, divided in **43** categories.
 
 # Index
 
-[Backup](#backup) (8) | [Calculators](#calc) (8) | [Chat and instant messaging](#chat) (12) | [Conversion](#conversion) (7) | [Data management](#data-management) (36) | [Data transfer](#transfer) (34) | [Directory changers](#cd) (13) | [Disk usage analyzers](#disk-analyzer) (11) | [Editors](#editors) (21) | [Email](#email) (10) | [File and file system handling](#file-handling) (39) | [File manager](#file-manager) (11) | [File renamers](#file-renamer) (8) | [File systems](#file-system) (4) | [Font management](#font) (2) | [Funny tools](#funny) (20) | [Games](#games) (36) | [Git and accessories](#git) (30) | [Graphics](#graphics) (24) | [Multimedia](#multimedia) (4) | [Networking](#networking) (20) | [Note taking](#note-taking) (15) | [Office tools](#office) (16) | [Organizers and calendars](#organizers) (14) | [Online search and resources](#online) (10) | [Password managers](#password-manager) (11) | [Productivity](#productivity) (34) | [Programming](#programming) (32) | [Science](#science) (9) | [Security and encryption](#security) (15) | [Shells](#shells) (6) | [Sound and music](#music) (24) | [System monitoring](#monitor) (28) | [System tools](#system) (30) | [Terminals](#terminal) (9) | [Text processing](#text-processing) (43) | [Text search](#text-search) (9) | [Todo managers](#todo-manager) (19) | [Utilities](#utility) (40) | [Versioning](#versioning) (6) | [Viewers](#viewers) (27) | [Web browser](#browser) (16) | [Web development](#webdev) (21)
+[Backup](#backup) (8) | [Calculators](#calc) (8) | [Chat and instant messaging](#chat) (12) | [Conversion](#conversion) (7) | [Data management](#data-management) (36) | [Data transfer](#transfer) (34) | [Directory changers](#cd) (13) | [Disk usage analyzers](#disk-analyzer) (11) | [Editors](#editors) (21) | [Email](#email) (10) | [File and file system handling](#file-handling) (39) | [File manager](#file-manager) (11) | [File renamers](#file-renamer) (8) | [File systems](#file-system) (4) | [Font management](#font) (2) | [Funny tools](#funny) (20) | [Games](#games) (36) | [Git and accessories](#git) (30) | [Graphics](#graphics) (24) | [Multimedia](#multimedia) (4) | [Networking](#networking) (20) | [Note taking](#note-taking) (15) | [Office tools](#office) (16) | [Organizers and calendars](#organizers) (14) | [Online search and resources](#online) (10) | [Password managers](#password-manager) (11) | [Productivity](#productivity) (34) | [Programming](#programming) (32) | [Science](#science) (9) | [Security and encryption](#security) (15) | [Shells](#shells) (6) | [Sound and music](#music) (24) | [System monitoring](#monitor) (28) | [System tools](#system) (30) | [Terminals](#terminal) (9) | [Text processing](#text-processing) (43) | [Text search](#text-search) (9) | [Todo managers](#todo-manager) (19) | [Utilities](#utility) (41) | [Versioning](#versioning) (6) | [Viewers](#viewers) (27) | [Web browser](#browser) (16) | [Web development](#webdev) (21)
 
 Some links to [related resources](#resources).
 
@@ -895,6 +895,7 @@ Music players.
 * [sauce](https://github.com/cadecuddy/sauce) - A novelty CLI tool that identifies an anime from an image and yields key data about it.
 * [Starship](https://github.com/starship/starship) - The cross-shell prompt for astronauts.
 * [tealdeer](https://github.com/dbrgn/tealdeer) - Very fast implementation of tldr in Rust.
+* [teetail](https://github.com/sl236/teetail) - Like tee, but only the tail goes in the file.
 * [termsaver](http://termsaver.brunobraga.net/) - termsaver to enjoy fancy ASCII screensavers like matrix, clock, starwars, and a couple of not-safe-for-work screens.
 * [The Fuck](https://github.com/nvbn/thefuck) - Magnificent app which corrects your previous console command (although I would be extra-cautious at making a program to automatically infer what I was intending).
 * [tldr](https://github.com/tldr-pages/tldr) - Client for tldr pages, a community effort to simplify the beloved man pages with practical examples.
diff --git a/data/apps.csv b/data/apps.csv
index b53237a..ef22d08 100644
--- a/data/apps.csv
+++ b/data/apps.csv
@@ -791,3 +791,4 @@ funny,Binary Clock,,https://github.com/tom-on-the-internet/binary-clock,Displays
 system,cli-tools-info,,https://github.com/Lilja/cli-info,"An overview of you CLI tools, if they are installed and what version they are on."
 utility,Nap,,https://github.com/maaslalani/nap,"Code snippet manager that allows to create and access new snippets quickly with the command-line interface or browse, manage, and organize them with the text-user interface."
 chat,ttchat,,https://github.com/atye/ttchat,Twitch chats in the terminal.
+utility,teetail,,https://github.com/sl236/teetail,"Like tee, but only the tail goes in the file."