Supertonic TTS is an open-source Android app that delivers high-performance, offline text-to-speech using ONNX models. It integrates as a system TTS provider, supports multiple languages and voices, and allows users to export audio and manage custom pronunciations, all while ensuring privacy.
Supertonic TTS is a Voice, TTS & speech product. It focuses on providing high-quality, private, offline text-to-speech capabilities on Android devices. It is built as an open-source project for android users needing offline TTS. Supertonic TTS is open source under the GPL-3.0 license. Supertonic TTS is available on the web and Android.
Behind Supertonic TTS is Brahmadeo, and the product first shipped in 2026. Development happens publicly on GitHub with 62 stars and 84 commits in the last 90 days. Key capabilities include Offline TTS, ONNX model support, and audio export. The interface is available in 26 languages, including Arabic, Tibetan, and Catalan.
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