A prototype proves it looks right. An MVP proves it works for real users. They look alike — which is the trap.
The gap is the hidden 80% a clickable prototype skips:
Real data models
Edge cases
Auth
Payments
Error/empty states
Founders read "polished prototype" as "almost done," then the last 20% of the look takes 80% of the effort.
Crossable — but only deliberately: clean handoff + fixed scope + weekly milestones.
On a tight timeline? → devxhub.com
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