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RHVoice vs SmartVoice: catalog facts
RHVoice	SmartVoice
Free Free and open source.	Free Free and open source under the MIT license.
Linux, Android	Android
Runs locally without a network connection Lightweight statistical parametric synthesis	Automatic language recognition and voice switching Adjustable volume, speech rate, and pitch for each voice
Sounds less natural than neural text-to-speech Language and voice coverage is limited compared with commercial engines	Requires Android 7.0 or later Automatic language recognition supports only a subset of languages
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.