I’m interested in ocean container shipping, so I built a Google Sheets add-on to automate the process of tracking shipping containers. It’s called Container Tracker and I just got it live on the Google Marketplace. https://workspace.google.com/marketplace/app/container_track...
Main workload is done by the backend (serverless functions).
I am currently working on a HubSpot extension (that uses same backend) with the goal to target few other platforms where users work, and integrate the functionality into their daily workload, as opposed to having it as standalone website or mobile app. I have fun doing it.