Reminduck is a free and open source reminder software for Linux. Using Reminduck you can remember any stuff easily and in a simple way. It is build using Vala and GTK and released under open source GNU General Public License v3.0. You can create recurrent reminders daily, weekly, monthly reminders with just setting time and date. It is simple and easy to use reminder app.
Install Reminduck on Ubuntu Linux
It is specially made for elementary OS but you can install it on almost all Linux distributions via flatpak. Just install flatpak and flathub on your system and restart it. After that open the command-line terminal application. You can open it via show applications menu or via ctrl+alt+t keys. In terminal run below Reminduck flatpak installation command.
flatpak install flathub com.github.matfantinel.reminduck
It will install the latest version of Reminduck Reminder application on your system. You can run this app via below command.
flatpak run com.github.matfantinel.reminduck
You can also uninstall it via
sudo flatpak uninstall com.github.matfantinel.reminduck