There are so many CRUD apps out there, they could be spec'd with such specificity that they only need a "coder" to complete the tickets. But the tech industry's combined architects/engineers and construction workers into a single developer role.
Someone who can make a boxy UI, hook those boxes up to {{text templates}}, and make GET/POST/PUT/DELETE calls (to RESTful API just thinly wrapping a SQL DB) can recreate a shocking number of popular web and mobile apps. Those are CRUD apps.
Non-CRUD apps have an unusual (non-boxy) UI, non-trivial backend processing/integrations, or both.
