Install zanshin by entering the following commands in the terminal:
sudo apt update sudo apt install zanshin
Description:
to-do list manager
Zanshin is a powerful yet simple application for managing your day to day actions and notes. It helps you organize and reduce the cognitive pressure of what one has to do in one's job and personal life. You'll never forget anything anymore, having a "mind like water".
Homepage: http://zanshin.kde.org/
Version: 0.5.0-1ubuntu1
Section: universe/kde