Kowairo Voice

Kowairo Voice is a completely offline Japanese text-to-speech app powered by Irodori-TTS v3. It runs entirely on-device — no internet connection required after the initial model download. FULLY OFFLINE & PRIVATE All processing happens on your device. Your text and generated audio never leave your phone. No data collection, no accounts needed. VOICE DESIGN Describe the voice you want in natural language — "calm female voice, cheerful" or "energetic young male voice" — and the AI generates speech matching your description. VOICE CLONING (DUAL MODE) Upload a reference audio recording to clone the voice. Combine with text descriptions for even more control. ORGANIZED LIBRARY Browse your generated clips by date, search by text content, and mark favorites for quick access. PLAYLISTS Group your audio clips into playlists. Play them in order, shuffled, or on repeat. POWERED BY IRODORI-TTS V3 Built on the latest Irodori-TTS v3 (VoiceDesign) model, fine-tuned for high-quality Japanese speech synthesis with expressive control. Perfect for content creators, language learners, accessibility needs, and anyone who wants to generate natural Japanese speech on their own terms.