Creating High Fidelity Prototypes for App Development

Written by
Last updated on:
October 1, 2025
Written by
Last updated on:
October 1, 2025

High fidelity prototypes are an integral part of our app development process at FullStack Labs. They not only allow our team to iterate quickly during the product design process, they also serve as the blueprints for the app that the development team will build from.

What Are Prototypes?

A prototype is a visual representation of how the final software product will look and behave once it has been built by our development team. App prototypes can take several forms, ranging from ultra-low to high fidelity. At the beginning of a project, it makes sense to iterate through concepts quickly and keep the prototype limited, but as the designs progress, the fidelity and complexity of the prototype will increase. At the end of a FullStack Labs design phase, the deliverable is a high fidelity prototype that demonstrates every feature and workflow of the app with pixel perfection alongside clear design documentation.

Methods

To accomplish this, we use a design and prototyping tool Called Figma. This allows us to stitch together views, dialogs, and even demonstrate the intended transitions between them. In the prototype, the clickable areas are indicated with a blue highlight. Tapping or dragging on those areas will allow you to interact with the app as though it had already been built. In addition to viewing the prototypes on your laptop, they can be loaded on your phone to help you get a sense of how it will feel in your own hand. We use these prototypes to get stakeholder feedback, conduct usability testing, and to demonstrate the final workflows to our development team.

By creating prototypes the FullStack Labs design team is able to both iterate quickly and demonstrate the app’s functionality in a way that a written product requirements document never could.

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Product Design

Frequently Asked Questions

A high fidelity prototype is a detailed, interactive representation of an app’s design that closely mirrors the final product. It includes pixel-perfect visuals, complete workflows, and functional interactions, giving stakeholders and development teams a realistic preview of how the app will look and behave.

High fidelity prototypes act as blueprints for the development team. They allow designers and stakeholders to validate ideas, identify usability issues, and align on app features before any code is written. This reduces misunderstandings, speeds up development, and ensures the final product matches the intended vision.

FullStack Labs uses Figma for designing and prototyping apps. It allows the team to stitch together screens, dialogs, and transitions into an interactive experience. Figma also supports real-time collaboration, making it easier to review, gather feedback, and make updates quickly.

Yes. Stakeholders can click, tap, and drag through the prototype as if they were using the finished app. These prototypes can be viewed on a desktop or loaded onto a mobile device to better visualize how the app will feel in the user’s hand, improving feedback and decision-making.

Prototypes bridge the gap between design and development by showcasing exactly how the app should function. They make workflows, transitions, and feature behaviors clear, which reduces ambiguity and saves time during development. They also support usability testing and stakeholder alignment, leading to a smoother and more efficient build process.