Amazing simplicity in a complex app-builder product, from the surveyor-perspective . From end-user perspective though, I think it's a difficult to do very long surveys through SMS's.
I think that's a fair point for sure. You don't want to do 40 questions flows with this. But we've seen really good success with flows of 5-10 questions, even with recipients who have limited literacy and technical know how. But yes, there are of course limits and you have to be sensitive to your users. Really every context and use case is so unique it is hard to even give guidelines there.
This appears to be built in/for a market where SMS is ubiquitous in a way that the internet isn't.