Simple Diary is a free and open source Diary software for Linux. In this digital diary you can save your content in markdown. It comes with Dark mode, light mode support and you add images in your diary entries. It is released under GNU General Public License v3.0 and written in c and based on GTK4. It is a simple and easy to use application.
Install Simple Diary on Ubuntu Linux
Simple Diary is available from flathub as a flatpak package. You need to install the flatpak and flathub on your system and restart it after the installation. After that open open your command-line terminal software using ctrl+alt+t keys and run below Simple Diary flatpak install command. It will install the latest version of Simple Diary application on your Ubuntu Linux system.
flatpak install flathub com.bjareholt.johan.SimpleDiary
Start Simple Diary using this command or via the application menu.
flatpak run com.bjareholt.johan.SimpleDiary
And uninstall it via
sudo flatpak uninstall com.bjareholt.johan.SimpleDiary