ChattyMouth

ChattyMouth is an AI eBook-to-audiobook converter that turns your eBooks into narrated audiobooks using high-quality synthetic voices, built for readers who prefer listening. It runs entirely offline as a text-to-speech app, so conversion happens on your own device with no internet connection, no accounts, and no per-character or per-minute charges. The app ships with 51 voices across 8 languages, letting you pick a narrator and read in the language that fits your library. Because it processes files locally, your documents stay private and never leave your machine. Speed is a stated focus: the maker reports roughly 8 minutes of processing per hour of audio on Apple silicon (M4), so a full-length book converts in a practical amount of time. ChattyMouth is sold without a subscription, positioning it as an alternative to cloud audiobook and TTS services that meter usage or bill monthly. It suits people who want to convert a personal eBook collection into audiobooks for commutes, workouts, or accessibility, and who value keeping the whole process on-device. As a self-contained audiobook maker, it targets the gap between manual reading and paying recurring fees for streamed AI narration.

Best for readers who want to convert personal eBooks into private, offline audiobooks without a subscription.