The concept is simple; if we’re given something first in the form of a behavior, gift, or service, we feel obliged to give back. Hulu, Netflix, Amazon Prime, and countless others give people a free trial of their service. On one hand, people get to try the services, but there’s another component bundled into this offer, and it’s psychological: the principle of reciprocity.
Narrative UX is the notion that, contrary to much of what shows up in the app world, style and point of view don’t have to mean extraneous pep or fallback irony. Instead, it asks, Who is your product? What values do you want to communicate through language and style? If your product is a character, how does it speak and — importantly — how doesn’t it?