AI Text to Speech - Sento

Sento is a professional-grade text-to-speech studio that runs entirely on your device. No internet required. No subscriptions. Pay once, use forever.

COMPLETELY OFFLINE & PRIVATE Every voice generation happens 100% on-device using Apple Silicon. Your text, voices, and audio files never leave your device. No data is sent to any server — ever. No account required.

VOICE CLONE — SOUND LIKE ANYONE Upload just 10 seconds of reference audio and Sento clones that voice with studio-grade fidelity. 48 kHz output quality. Use it for audiobooks, podcasts, content creation, or personal projects.

VOICE DESIGN — CREATE ANY VOICE Don't have reference audio? Simply describe the voice you want — "warm female voice, mid-30s, conversational" — and Sento generates an entirely new speaker from your description.

30 LANGUAGES, ZERO CONFIGURATION Supports Arabic, Burmese, Chinese, Danish, Dutch, English, Finnish, French, German, Greek, Hebrew, Hindi, Indonesian, Italian, Japanese, Khmer, Korean, Lao, Malay, Norwegian, Polish, Portuguese, Russian, Spanish, Swahili, Swedish, Tagalog, Thai, Turkish, and Vietnamese. Language is detected automatically — just type and generate.

VOICE LIBRARY Save your favorite voices — cloned or designed — in the built-in library for instant reuse. Build your personal collection of characters and speakers.

MULTI-SPEAKER DIALOGUE Create natural conversations between multiple speakers. Each speaker gets their own voice, and tone flows automatically between dialogue lines for natural-sounding exchanges.

DIRECTION CONTROL Add emotion and style to your speech: cheerful, whispered, dramatic, calm, fast, slow — tap to insert, the AI handles the rest.

DEVICE REQUIREMENTS Sento runs a 3 GB on-device AI model and requires devices with sufficient memory:

• iPhone: iPhone 15 Pro or later (6 GB+ RAM)
• iPad: iPad with M1 chip or later (8 GB+ RAM)
• Mac: Any Apple Silicon Mac (M1 or later, 8 GB+ RAM) Older or lower-memory devices may experience crashes during generation.

ONE-TIME PURCHASE No subscription. No in-app purchases. No ads. Pay once and use Sento forever, including all future updates.