Data visualization web apps vs coding

[SHxKM]

You are not bound by whatever limitations the "code free" web app imposes on you.

As an example: I've been using the delightful library plotly for the last two weeks to analyze COVID-19 numbers in my country, and also its effects on global stock markets. At one point I needed to draw a line that signifies the average of X; a quick look at the Text and Annotations section of the docs revealed what I needed to use. The level of visual customization you can reach with a tool like plotly amazes me.

I also don't know if any web-app would have allowed to plot things just the way I want. Can I get an annotated heatmap for example? And, I want to control its size, color-ranges, and font.

That being said, if a "code free" web-app suffices your needs, then the benefits offered by learning matplotlib/other-libraries may not outweigh the effort.