Build a local-first audiobook manager that imports user-controlled files, repairs metadata, groups chapters correctly, preserves progress and bookmarks, and plays everything offline. Users choose their own storage destination and can create an encrypted backup that restores the library state without depending on the audiobook seller. The initial product should support lawful, unprotected files rather than attempting to bypass DRM.

Consumers are accumulating digital book libraries across increasingly fragmented stores and subscriptions while becoming more concerned about access disappearing after cancellation or an app update. The signals span numerous products and repeatedly emphasize offline reliability, portability, and preservation rather than one isolated application defect.