The calculator has a them like IOS calculator.And is made in Tkinter
with [ttkboostrap](https://ttkbootstrap.readthedocs.io/en/latest/).
The app it will look different on windows and Linux/Macos.
Use the package manager [pip](https://pip.pypa.io/en/stable/) to
install [ttkboostrap](https://ttkbootstrap.readthedocs.io/en/latest/)
pip install ttkboostrap
Any advice are wellcome. :)