GrammarChecker.net might be a bit more popular than Expresso app. We know about 1 link to it since March 2021 and only 1 link to Expresso app. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Anyway expresso-app.org is ten times better for review and reflection of sentence structure; it's free and it doesn't bug me with annoying ads everytime I watch a YouTube clip.expresso-app.org. Source: almost 3 years ago
Try the Grammarly extension or this online grammar checker. Source: almost 2 years ago
LanguageTool - Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.
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Stylewriter - StyleWriter edits any document.