FidiKetabi positions itself as a dedicated EPUB reading solution for iOS users, focusing on local file management rather than integrated bookstore functionality. The application enables direct EPUB uploads and provides robust reading customization, distinguishing itself through offline accessibility and user-controlled content. Core functionality centers on EPUB rendering with adjustable text size, font selection, and background themes, including a night mode option for reduced eye strain. The annotation system allows highlighted passages and digital note-taking, though lacks cloud synchronization. Formatting options include margin adjustments and line spacing controls, providing granular reading personalization unavailable in default iOS reading applications. The interface employs a minimalist design with gesture-based navigation for page turns and chapter browsing. Real-world usage shows particular strength in academic or technical reading scenarios where note preservation is critical. However, the absence of built-in dictionary integration or translation tools limits functionality for multilingual texts. User feedback indicates generally positive experiences with specific technical exceptions. Sepehr Farhodi (November 2024) praised the reading experience as 'perfect,' while sabahi713 (November 2024) reported persistent formatting issues with text overlapping page elements. Ahmadrezakf (September 2024) documented authentication failures following updates, suggesting ongoing backend stability concerns. The application demonstrates strength in EPUB rendering fidelity and customization depth, though suffers from inconsistent formatting handling and account system reliability. Ideal for users requiring offline EPUB access with annotation needs, but less suited for those requiring social features or integrated content ecosystems.