Read&Write for Google Chrome Premium Matrix
Free Premium
Google Docs, Google Slides and Web Supports
Text to Speech (TTS) yes yes
Change TTS Voice yes yes
Change TTS Speed yes yes
Translator yes yes
Change Translator Language yes yes
Mult-Language Support yes yes
Practice Reading Aloud yes yes
Word Prediction yes
Talking Dictionary yes
Picture Dictionary yes
Fact Finder yes
Screen Masking yes
Speech Input * yes
Speech Maker yes
Study Skills Highlighters yes
Collect Highlights * yes
Vocabulary Builder * yes
Simplify (Web) yes
Voice Notes * yes
PDF/KES Supports
Text to Speech yes
Word Prediction yes
Talking Dictionary yes
Picture Dictionary yes
Translator yes
Multi-Language Support yes
Fact Finder yes
Speech Input yes
Study Skills Highlighters yes
Collect Highlights yes
Vocabulary Builder yes
Typewriter Annotations yes
Pushpin Annotations yes
Speech and Translation Options yes
Navigation Controls yes
Print (PDF only) yes
ePub Supports
Text to Speech yes
Talking Dictionary yes
Picture Dictionary yes
Translator yes
Fact Finder yes
Study Skills Highlighters yes
Collect Highlights yes
Vocabulary Builder yes
Bookmarks yes
Pushpin Annotations yes
Speech and Translation Options yes
Font Display Options yes
Navigation Controls yes

* currently not available in Google Slides