Supertonic TTS
Supertonic TTS is a free, open-source utility app for Android. Local AI Text-to-Speech using Supertonic ONNX. It has 102 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid and Google Play.
github.com/DevGitPit/supertonic-android (opens in a new tab)
- Android
- Kotlin
- Utilities
- Actively maintained
About Supertonic TTS
Supertonic TTS is a high-performance, on-device text-to-speech (TTS) system for Android. It uses Supertonic ONNX models to provide high-quality speech synthesis entirely offline, ensuring privacy and availability without an internet connection. Key Features: - Offline Inference: Runs entirely on-device using ONNX Runtime. - System Integration: Standard Android TTS provider, usable in any app. - Native Rust Core: High-performance inference powered by a native Rust backend. - Material Design 3: A modern and clean user interface built with Jetpack Compose. - Audio Export: Save synthesized speech as WAV files. - Lexicon Management: Define custom pronunciation rules for specific terms.
Privacy and F-Droid
F-Droid builds Supertonic TTS from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
- Relies on a non-free network service
Screenshots
Screenshots from the app's F-Droid listing.
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What is Supertonic TTS?
Supertonic TTS is a free, open-source utility app for Android. Local AI Text-to-Speech using Supertonic ONNX. It has 102 GitHub stars and is released under the GPL-3.0-only license, and you can install it from F-Droid and Google Play.
Is Supertonic TTS free and open source?
Yes. Supertonic TTS's source code is public on GitHub under the GPL-3.0-only license, which is OSI-approved or FSF-free. F-Droid flags these anti-features on its latest build: relies on a non-free network service.
How do I install Supertonic TTS?
You can install Supertonic TTS from F-Droid (package com.brahmadeo.supertonic.tts) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: v3.2.7).
Is Supertonic TTS still maintained?
The repository's most recent commit was on Jul 29, 2026. Its F-Droid listing was last updated on Jul 31, 2026. appsgit only lists apps whose repository had a commit in the last six months.