How is it different from a design prototype?
A design prototype usually explores a future product and may focus on user testing. A fictional interface generator focuses on the screen as part of a story, video or visual concept.
The two can overlap, but the fictional generator prioritizes fast scene setup and reusable invented data.
How is it different from a screenshot editor?
A screenshot editor modifies an existing image. A generator creates the interface from structured fields, which makes revisions and multiple states easier.
Interactive generators can also support scrolling, navigation and direct recording.
What should a good generator provide?
Look for distinct scene types, meaningful field editing, consistent profiles, saved states and clean output. It should not require access to the real accounts being represented.
It should also make the intended fictional or authorized use clear rather than encouraging false proof or impersonation.
A world-building tool for screens
A fictional interface generator does for digital screens what a prop builder does for physical objects: it creates the believable artifact the story needs.