Retrodex serves as an essential tool for retro gaming enthusiasts, providing a comprehensive encyclopedia and collection management system. It allows users to browse and catalog thousands of retro games from various classic platforms, including NES, SNES, Genesis, and PlayStation. The app features a curated catalog with box art, screenshots, and promotional videos, alongside a versatile interface that lets users filter games by genre, rarity, and release year. The Discover tab highlights daily game recommendations and top-rated selections tailored to user preferences.

In addition to browsing, Retrodex enables users to build and manage their collection effectively. Users can mark games as Owned, Wanted, or Played, alongside adding personal notes and logging purchase details. With in-depth game information that includes developer and publisher details, IGDB ratings, and cheat codes, users have everything they need at their fingertips. The app also supports data backup and synchronization, allowing users to export their collection or import games easily.