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1Checker, the best free grammar checker, allows you to instantly check texts for various mistakes and offers you improvement suggestions for writing better English.

Powered by Artificial Intelligence (AI) and Natural Language Processing (NLP) technologies, 1Checker is an ideal writing enhancement tool with spelling check, grammar check, style review, vocabulary enrichment, dictionary, translation and more this-is-exactly-what-I-want benefits all packed in one.

What's New

Version 2.1.3:
  • Warning of possible profanity in suggestions


  • OS X 10.7 or later

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1Checker User Discussion

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Derekcurrie Member IconComment+719

Oh dear: Reading their 'About Us' page, linked below, it's evident that 'they' are NOT masters of English grammar. Ahem! So, much as their grammar is superior to the average Chinese English speaker, it's NOT professional quality. Therefore, I cannot recommend this application. If 'they' can't use it to provide them with perfect grammar, you aren't going to either. That's a shame as I was very enthusiastic to try this out.

Examples of bad grammar on their 'About Us' web page:
- "We are a University of Cambridge spin-out, specializing in Artificial Intelligence and Natural Language Processing (NLP) technologies. [Remove the comma. Also, the developers may have an association with the University of Cambridge, UK, but they are NOT native speakers of English. That is clear.]
- "We are not a big team, at least not yet, but we want to deliver automated proofreading service differently:" [The correct word would be 'services'. The sentence is also incoherent with no connecting cause and effect.]
- "Frankly speaking, no grammar checker on the market previously is worth your money." [This sentence has bad syntax. This is less confusing syntax: "no grammar checker previously on the market is worth your money"]
- "It is beyond our imagination that some grammar checkers only update once or twice a year." [This sentence approaches incoherence. Replace 'that' with 'why'.]

And so forth. Their grammar is better than 'ChingLish' but it's not proper English. Oh well.


Reply0 replies
Version 2.1.3
Hmfwic Member IconComment+17

From the Mac Ap Store:

This service is governed by China. The reviewer deleted the app because of that fact and it uses virtual memory. That person never tried the app so that person doesn't know how it works.

I rated in a 1 because of those facts. When I try it I'll adjust my rating.

Reply2 replies
Version 2.1.0

As they say in my country: "Huh?"


Thank for pointing out the fact that this comes from China.

On their website they claim they were an "University of Cambridge spin-out" which I question. Strange....

Pacmanen Member IconReview+29

So great and so easy to use to find a lot of mistakes with, keep up the good work :-) I am not sure if possible but if I had one thing to wish for then it would be a app for the phone too :-)

Reply0 replies
Version 2.1.0
user icon+1
Version 2.0.0
> 5 2


Current Version (2.x)


Downloads 644
Version Downloads 108
License Free
Date 26 Jul 2014
Platform Intel 64 / OS X
Price Free