Libby, developed by OverDrive, Inc., represents a sophisticated digital gateway to public library collections, offering instant access to millions of ebooks, audiobooks, and magazines. The app serves as a modern replacement for OverDrive's legacy application, positioning itself as the primary digital lending platform for libraries worldwide. Its core functionality revolves around connecting users with their local library's digital catalog through a streamlined, mobile-first interface. The application's feature set includes comprehensive catalog browsing with filtering options, one-tap borrowing, and flexible reading/listening options. Users can download content for offline access or stream materials to conserve device storage. Notably, the app supports Kindle integration for ebook transfers in the United States and Android Auto compatibility for in-car audiobook listening. The synchronization system maintains reading progress across multiple devices, while customizable reading settings enhance the user experience for various content types. User experience demonstrates thoughtful design with intuitive navigation and minimal learning curve. The interface employs clear visual indicators for availability status, loan periods, and hold positions. Real-world usage patterns show heavy engagement during commute times for audiobook streaming and evening hours for ebook reading. The app efficiently manages multiple library cards simultaneously, though some users report occasional performance issues with larger library systems or extensive personal collections. User feedback trends indicate overwhelming satisfaction with the core lending functionality, though specific feature comparisons with the previous OverDrive app emerge. Daniel Brinkman (July 4, 2025) praised the resolution of technical issues and called it 'a great app for finding my next audiobook or e-book.' Patricia Perez (July 3, 2025) noted missing features from the legacy platform: 'we could request books that weren't owned by the library yet, and see when up and coming new books were going to become available.' Multiple reviewers including Roberta Ransome (July 7, 2025) highlighted the value of accessing content during routine activities. The application excels in providing free, legal access to extensive digital collections with professional-grade reading and listening experiences. Limitations include geographic restrictions on certain features like Kindle integration and occasional gaps in title availability between libraries. The absence of a wishlist notification system for upcoming releases represents a notable omission compared to predecessor applications. Libby proves most valuable for regular library patrons seeking cost-effective access to current publications across multiple formats without physical visits to library branches.