When should you use low-fidelity prototypes, and when should you move to high fidelity?

Short answer

Low-fidelity prototypes (paper sketches and simple wireframes) are used early to test concepts and flows quickly and cheaply. High-fidelity prototypes test interaction and visual detail before implementation.

Explanation

If you present a high-fidelity design too early, stakeholders and users focus on color shades and button shadows and ignore the architecture and flaws in the user journey. Black-and-white wireframes force everyone to focus on content, hierarchy, and whether the idea solves the problem at all. Once the structure is stable, move to high-fidelity prototypes with color systems and realistic animations.

Common mistakes

• Starting a Figma project by drawing icons, colors, and precise details during the first brainstorming session.
• Testing text readability and color contrast using low-fidelity wireframes.

Follow-up questions

• What is the Rapid Prototyping Cycle (Build-Measure-Learn)?

Sources

• Nielsen Norman Group — Prototyping: Low-Fidelity vs. High-Fidelity