1. Choose Your Speech Engine
On Device AI supports multiple speech synthesis engines to give you broad flexibility: choose between Apple's native system voices (directly utilizing macOS and iOS system resources) or compile highly premium neural voice models using the built-in Kokoro TTS and PocketTTS engines.
2. High-Fidelity Kokoro Neural Voices
The Kokoro TTS engine represents a breakthrough in open-source offline speech quality, producing natural, expressive voice patterns with human-like breathing and pacing. Select from multiple professional voice profiles (male, female, narrative, academic) optimized to run directly on the neural processor of your device.
3. Create Audiobooks and Export Audio
Turn any PDF, lengthy document, saved article, or chat transcript into local audiobooks. Simply click play to listen to your text immediately, or export the processed speech into clean MP3 or WAV files locally. Ideal for offloading study materials or drafting podcast outlines.
4. Absolute Privacy for Sensitive Documents
Since standard cloud-based text-to-speech services require sending your raw text to remote servers, using them on sensitive commercial plans, corporate contracts, or medical records presents significant privacy risks. On Device AI processes speech generation exclusively in-memory on your machine, ensuring your data never leaves your hardware.