This is exactly what I came to post. It's just a really well thought out service with gobs of connectors and a rich enough model to allow for basic boolean, looping, and scripting.

I used it plus a Google sheet as the first version of a UI for the last company I worked at. Instead of waiting for our front-end folks to finish up the UI, I just pointed a logic app at it, ran some basic logic on it, and brought it into the system whenever it was changed, and imported the data into the main data stores.