diff --git a/README.md b/README.md
index 7581a85..6a75242 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, **799** apps/tools covered, divided in **43** categories.
+To date, **800** 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) (15) | [Online search and resources](#online) (10) | [Password managers](#password-manager) (11) | [Productivity](#productivity) (34) | [Programming](#programming) (33) | [Science](#science) (10) | [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) (44) | [Text search](#text-search) (9) | [Todo managers](#todo-manager) (19) | [Utilities](#utility) (42) | [Versioning](#versioning) (6) | [Viewers](#viewers) (27) | [Web browser](#browser) (16) | [Web development](#webdev) (22)
+[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) (16) | [Online search and resources](#online) (10) | [Password managers](#password-manager) (11) | [Productivity](#productivity) (34) | [Programming](#programming) (33) | [Science](#science) (10) | [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) (44) | [Text search](#text-search) (9) | [Todo managers](#todo-manager) (19) | [Utilities](#utility) (42) | [Versioning](#versioning) (6) | [Viewers](#viewers) (27) | [Web browser](#browser) (16) | [Web development](#webdev) (22)
 
 Some links to [related resources](#resources).
 
@@ -532,6 +532,7 @@ Calendar managers.
 * [khard](https://github.com/lucc/khard) - Console carddav client written in Pyhton.  
 * [Org mode](https://git.savannah.gnu.org/cgit/emacs/org-mode.git) - Super-powerful [Emacs](https://www.gnu.org/software/emacs/) plugin to manage outlines with associated timestamps, priorities, labels, etc.; available views grouped by time (agenda), tags, etc.; plain text storage format.
 * [pal](https://sourceforge.net/p/palcal/code/HEAD/tree/) - Calendar program for Unix/Linux systems that can keep track of events; custom, plain text storage format; interesting and fully functional.
+* [peroutine](https://github.com/UlyssesZh/peroutine) - Remind you of periodical events. The period can be any positive integer of days, so work around the fact that the number of days in a week is prime.
 * [ppl addressbook](http://ppladdressbook.org/) - `ppl` is free software made out of other free software.  It's built on top of Ruby and Git, and the completely free vcard address book format.
 * [Remind](https://git.skoll.ca/Skollsoft-Public/Remind) - Calendar program with possibility to set complex rules to define events; custom, powerful text-based storage format.
 * [remint](https://sr.ht/~mlaparie/remint/) - A simple terminal UI wrapper for D. Skoll's Remind calendar program
diff --git a/data/apps.csv b/data/apps.csv
index 1f16674..8090535 100644
--- a/data/apps.csv
+++ b/data/apps.csv
@@ -798,3 +798,4 @@ programming,fmake,,https://github.com/bharatvaj/fmake,Brings `make`s interface t
 organizers,caldr,,https://github.com/mrusme/caldr,A lightweight CLI / TUI calendar that supports CalDAV.
 utility,MUC,,https://github.com/nate-sys/muc,Visualize your most used commands.
 text-processing,pup,,https://github.com/ericchiang/pup,Parsing HTML at the command line.
+organizers,peroutine,,https://github.com/UlyssesZh/peroutine,"Remind you of periodical events. The period can be any positive integer of days, so work around the fact that the number of days in a week is prime."