Google Colab is a popular notebook service that you can run directly from your browser. Python is natively supported and it's fairly easy to run a Jupyter notebook, even with custom dependencies like Numpy and Matplotlib.

You can run IOSACal in Google Colab! I have added a new short how-to guide in the official documentation. Find the how-to at https://iosacal.readthedocs.io/en/latest/google_colab.html

This takes advantage of a demo notebook that was contributed by Jelmer Wind.