A lot of times the apps we work on need to communicate outside of themselves. How does your app speak with your users or the world? Is email your preferred method? SMS? WhatsApp? Does it make a difference what you are communicating or where you are communicating?

Where I live in Israel almost all communication from apps is done via SMS. Email communication comes in a distant second, while WhatsApp is used for just about all personal communication.

What about you? What do you build with? What do you prefer?