I want to write an app that sends an SMS to users, and when the recipients texts back, I receive that response, including the originating phone number, and my program can react to that response.
I've googled "Interactive SMS" but didn't find anything that was clearly a fit. Has anyone else done this, got any recommendations for a paid service that provides this kind of functionality?
Alternatively, do you have any other recommendations for how to build this service into my app, which will probably be written in C#?
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