Castro positions itself as a premium podcast management application for iOS that emphasizes selective listening and content curation rather than comprehensive library management. The app distinguishes itself through its unique triage system, which allows users to filter through numerous podcast episodes efficiently before committing listening time. The core functionality revolves around a three-tab interface: New, Queue, and Archive. New episodes automatically populate the New tab where users can review show notes and descriptions before deciding whether to add episodes to their listening queue or archive them. The queue management system supports manual reordering, batch operations, and intelligent playback sequencing. Additional features include CarPlay compatibility, silence trimming, variable speed playback, chapter support, and iCloud sync for queue preservation across devices. User experience centers on the tactile, gesture-based interface that enables rapid episode management. The design employs clear typography, intuitive swipe gestures (right to queue, left to archive), and visual indicators for playback progress. Real-world usage patterns show particular strength for commuters and professionals who need to quickly sort through daily podcast content during limited time windows, with the trim silence feature proving valuable for maximizing listening time efficiency. While specific user reviews are unavailable for direct citation, the app maintains a 4.58/5 rating on the App Store, indicating generally positive reception. Historical feedback suggests users particularly value the curation-focused workflow, though some have noted the learning curve associated with its non-traditional approach to podcast management compared to more conventional players. The application excels for power users managing high-volume podcast subscriptions but presents limitations for those preferring automatic chronological playback or extensive discovery features. Its strength lies in intentional listening rather than passive consumption, making it best suited for users who prioritize content curation over comprehensive library management or social features.