Written is designed as a dual-platform experience. The app is the exclusive place to read purchased books, ensuring security and preventing piracy.

It features a custom-built, designer-quality reader, a personal library of purchased books, and a wishlist—all built for a smooth, distraction-free reading experience. While the full list of supported OS versions is still being finalized, the app is expected to work well on iOS 14+ and Android 5.0+.

Everything else—book discovery, purchasing, publishing, reselling, and author profiles—takes place on the web platform, which performs best on modern browsers like Chrome, Firefox, Edge, and Safari. Most upcoming features will be web-first and accessible from both desktop and mobile browsers.