Supertonic TTS
Voice Synthesis Without Compromise
• Reclaim your privacy and enhance your productivity with Supertonic TTS, a high-performance speech engine that puts you in total control.
• By shifting processing from the cloud to your local device, Supertonic delivers professional-grade, natural-sounding audio the moment you need it, without tethering you to an internet connection.
Why Choose Supertonic?
1. Privacy-First Performance:
• Your data is yours alone.
• Because Supertonic processes everything locally on your device, your text and generated audio never touch a third-party server.
• Enjoy complete peace of mind with zero tracking and zero data collection.
2. System-Wide Integration:
• Elevate your mobile experience by setting Supertonic as your default Android speech engine.
• It integrates effortlessly with your navigation, accessibility tools, and e-readers for a consistent, high-quality voice across your entire device.
3. Engineered for Speed:
• Built on a robust Rust backend and optimized using ONNX Runtime, our engine is designed for extreme efficiency.
• Experience near-zero latency and high-fidelity speech synthesis while preserving your battery life.
4. Advanced Customization:
• Take command of your audio with a built-in lexicon editor.
• Whether it is technical jargon, niche acronyms, or difficult names, you can define exactly how words are pronounced to ensure every sentence sounds perfect.
5. Integrated Reading & Export:
• Transform your device into a versatile listening station.
• Use the integrated e-book reader to enjoy EPUB and PDF files directly, or export your text as high-quality WAV files to use in your own creative projects.
6. Modern Design:
• Built with Jetpack Compose, Supertonic features a clean, Material Design 3 interface that is as intuitive to use as it is beautiful to look at.
Transparency and Community
• We believe that great software should be open.
• Supertonic TTS is fully open-source, reflecting our commitment to security, transparency, and collaborative development.
• By combining state-of-the-art machine learning with the safety of modern programming, we are setting a new standard for what a speech engine can be.
Download Supertonic TTS today
• Experience the future of private, high-speed voice synthesis.
FAQ
Q: Is my personal data sent to a server when I use this app?
A: Your privacy is our top priority, and we ensure that your data never leaves your device. Because Supertonic processes everything locally, your text and audio output are never transmitted to third-party servers, meaning there is zero tracking and zero data collection involved.
Q: Can I use Supertonic TTS as my default text-to-speech engine on Android?
A: Yes, you can easily set Supertonic as your primary speech engine within your Android system settings. Once configured, it will replace the device's default voice, allowing you to use high-quality, natural-sounding audio across your navigation apps, accessibility tools, and e-readers.
Q: How does the app maintain high performance while being offline?
A: The engine is built on a robust Rust backend and is highly optimized using ONNX Runtime. This combination allows for extreme efficiency, delivering near-zero latency and high-fidelity speech synthesis while being mindful of your battery life.
Version History
v3.2.3——8 Jul 2026
High-performance, private, and offline systemwide text-to-speech. Download the latest version of Supertonic TTS to enjoy new features and updates immediately!
*3.2.3
Minor bug fixes and improvements. Install or update to the newest version to check it out!
*3.2.2
Minor bug fixes and improvements. Install or update to the newest version to check it out!
*3.1.4
Minor bug fixes and improvements. Install or update to the newest version to check it out!
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