DeArrow - Better Titles and Thumbnails
Functionality & UI
FreemiumConfidence 64
Crowdsourcing titles and thumbnails to be descriptive and not sensational
Users
100K
Rating
4.3
Reviews
310
7D Growth
0|0%
Stable signalFree or hybridMedium-risk permissions
Private Grammar Checker - Harper
The private grammar checker for 21st Century English
Users40KCurrent public install base
Rating4.2Store average score
Reviews101Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
3 assetsPrivate Grammar Checker - Harper Media preview
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User Growth Over Time
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7-day rating trend
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7-day rating change
Start
4.14
Latest
4.17
7-day rating change
+0.03
2026年7月14日2026年7月20日
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----Technical snapshot
Version, languages, and crawl freshness
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Version1.12.0
ManifestV3
Size15.46MiB
Languages1English
Published
Store updated
Last crawled
English
Overview
Product summary
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Harper is an English grammar checker designed to be just right. I created it after years of dealing with the shortcomings of the competition.
Grammarly was too expensive and too overbearing. Its suggestions lacked context, and were often just plain wrong. Not to mention: it's a privacy nightmare. Everything you write with Grammarly is sent to their servers. Their privacy policy claims they don't sell the data, but that doesn't mean they don't use it to train large language models and god knows what else. Not only that, but the round-trip-time of the network request makes revising your work all the more tedious.
LanguageTool is great, if you have gigabytes of RAM to spare and are willing to download the ~16GB n-gram dataset. Besides the memory requirements, I found LanguageTool too slow: it would take several seconds to lint even a moderate-size document.
That's why I created Harper: it is the grammar checker that fits my needs. Not only does it take milliseconds to lint a document, take less than 1/50th of LanguageTool's memory footprint, but it is also completely private. That's the power of open source.
Reviews
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Store average score4.2Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average3.9Average computed only from synced review bodies below
Reviews with text70Synced review bodies
Total ratings / reviews101Chrome Web Store public rating/review count
Store average score: 4.2. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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This app works great for google and other popular search engines. But I use Ecosia, and it doesn't work at all on that search engine. Can this be fixed?
Breath of fresh air compared to the other bloated options. It may not be perfect, but it beats the alternatives. Hopefully the developers continue improving on it!
I'd rather use something that's free to use and doesn't rely on AI than having to use extensions like Grammarly or SpellChecker. Of course there is still a lot of room for improvement, but that's what I'm cheering for. I'll keep reporting issues with incorrect reviews to give feedback and help the dev team develop Harper.
It's ok, but it often suggests a single correction that is no where near the correct grammar. I understand it's still in development and will try it out again in the future, but for now it's less useful than Googles built in spell checker.
free, open-source, still developing. much love to the dev team <3
I'm so happy I don't have the Grammery keylogger installed anymore, it makes me want to cry.
Ironically, it often wrongly says to write "too" for "to" or "then" for "than". It would need itself a spell checker. It needs a lot of improvement.
As a dyslexic person who hates AI, this is a total lifesaver! I haven't encountered any bugs at the moment, and it doesn't lag my laptop at all.
Works for me. I don't mind going an extra mile if there are any issues.
Zendesk functionality is unreliable, works about 40% of the time, requiring a page refresh to restore functionality, sometimes just cutting out mid writing. The UI is really nice but the spell checker is quite limited, it really struggles to handle words where a letter should be repeated and has been missed.