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SherpaTTS vs SmartVoice: catalog facts
SherpaTTS	SmartVoice
Free Free and open source under the GPL 3.0 licence.	Free Free and open source under the MIT license.
Android	Android
Speech is generated on the device Internet needed only to download the voice model	Automatic language recognition and voice switching Adjustable volume, speech rate, and pitch for each voice
Developer says it will stop working on certified Android devices after Google's identity requirement Voice quality depends on the model you pick	Requires Android 7.0 or later Automatic language recognition supports only a subset of languages
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	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 October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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