Modular Calculator is a free and open source calculator application for Linux. It is a script-able and modular calculator. Here you can add, remove and customize features. It is written in python. It comes with variable assignment, date and time calculations, Boolean logic, Units conversion, Arrays,String,regular expressions,User-defined functions and more.
How to Install Modular Calculator on Ubuntu Linux
Modular Calculator is available as a flatpak package file. So you need to install flatpak and flathub on your system and restart it after the installation.
After that open the terminal app using ctrl+alt+t keys and run this below Modular Calculator flatpak install command.
flatpak install flathub io.github.jordanl2.ModularCalculator
After the installation open Modular Calculator using
flatpak run io.github.jordanl2.ModularCalculator
And you can also uninstall it using
sudo flatpak uninstall io.github.jordanl2.ModularCalculator