BookFlow

Drop in any folder. Never lose your place. BookFlow turns local audio folders into a calm, organized audiobook library. Choose a folder with Android's system picker and BookFlow scans it with read-only access. Your audio stays on your device and the original files are never renamed, moved, deleted, or edited. Built for real-world audiobook folders • Discover M4B, M4A/AAC, and MP3 files • Group multi-file books using folders, track numbers, and metadata • Keep uncertain matches in the Import Inbox for your review • Review grouping evidence and change file order without touching source files • Use embedded or file-based chapters when available • Check device decoder availability for formats whose support varies by device Never lose your place • Save durable progress checkpoints during listening • Flush progress on pause, seek, chapter changes, and book switches • Resume from your latest saved position • Restore meaningful listening moments from the Playback Timeline • Add bookmarks for places you want to revisit Comfortable long-form playback • Background playback with notification and lock-screen controls • 10-second rewind and 30-second forward controls • Playback speed from 0.5x to 3.0x • Sleep timer, including stop at the end of a chapter • Per-book speed memory, optional silence skipping, and automatic rewind • Chapter progress and total book progress shown separately Private and portable • No account, advertising, analytics, or audio uploads • No broad storage permission • Versioned JSON backup for progress, bookmarks, organization, queues, and settings • Backup files never contain audio bytes • Fingerprint matching can reconnect moved or renamed local files; ambiguous matches require review • Optional local video-to-M4A import supports media you own. Protected media, URLs, streaming extraction, and DRM bypass are not supported. BookFlow Pro is an optional one-time purchase. Core local playback remains available for free. Pro unlocks multiple library folders, complete Import Inbox controls, full Timeline Undo, series and custom queues, backup and restore, video import, and advanced preferences. There is no subscription. Codec playback and conversion availability can depend on the decoders provided by your Android device. BookFlow explains unsupported files instead of claiming that every format works everywhere.