Niello

App Store submission is the last mile most developers dread and most designers ignore. Niello treats it as a design problem. A live canvas renders pixel-perfect device frames across every iPhone and iPad size, with five background styles and four color themes that maintain visual coherence across an entire screenshot set. The Brand DNA system captures not just colors and typography but brand voice — feeding an AI agent that writes captions, refines promotional text, and translates metadata into eight languages while preserving tone and character budgets. What traditionally takes days of manual work per locale is reduced to minutes. Built as a Tauri desktop application with a Go backend, Niello approaches app publishing not as a chore but as the final act of product craft.