Is it possible to detect (programmatically), from an iMessage app extension: from the sender side: Whether the person you are talking to is using iMessage on their end, or they are an SMS/MMS user (Such as Android or Windows phone)
Basically I need to tailor my delivery experience based on whether they can render the fully rich experience, or a minimized subset of it.
For example, for iMessages, I actually want to deliver in-line video. For MMS/SMS, i maybe only want to show an Image only, or maybe even a Link only, to avoid the recipient's SMS/MMS charges.