Well, if you’re going to build your form with a non-Anvil service, yes, I would definitely recommend something with a simpler API! Typeform’s API docs indicate that they submit results as a simple JSON payload, which will be easy as pie to consume in Anvil!
I will use Typeform but I must say I am not familiar on how to do this. Lets see where I get stuck at 
To all that recommended Anvil. I completely agree that Anvil would be the easiest and I actually am very familiar with how to use to create and transfer data, however, I am trying to understand the process for external services to provide data for my app. I chose JotForm’s as I thought it would be the easiest to work with. I will try Typeform but if their is a tutorial on this, I would love a link to it