Sebastian

Sebastian helps you quickly build native mobile app prototypes for iOS and Android from a text description. Describe the idea, style, and key features, and the system assembles a working prototype in minutes.

Vibe Coding from prompts

Sebastian’s “Vibe Coding” approach focuses on how you imagine the product—its look, user flows, and target audience—rather than manual screen layout and navigation setup.

• Generate screens from a few prompts
• Use native UI components and animations
• Iterate by refining requirements and prompts

Native prototypes for iOS and Android

The output is a native app prototype that accounts for platform differences. You can review changes close to real time, adjust the spec, and immediately see how the interface updates.

• Test product hypotheses faster
• Create demos for clients and stakeholders
• Build early MVPs without deep iOS/Android stack knowledge

Who it’s for

Sebastian is useful for developers, product managers, designers, and startup founders who want to shorten the path from idea to a clickable mobile prototype.