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SherpaTTS vs Marmalade TTS: catalog facts
SherpaTTS	Marmalade TTS
Free Free and open source under the GPL 3.0 licence.	Free Free and open source; the published app is distributed under GPL-3.0-or-later.
Android	Android
Speech is generated on the device Internet needed only to download the voice model	Works as Android's system text-to-speech engine Includes an English voice that works offline
Developer says it will stop working on certified Android devices after Google's identity requirement Voice quality depends on the model you pick	Cloud voices require a provider API key
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	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.