I am not qualified to rank spell checkers but I can tell you this:
When I started working on the internet, I soon realized I should write in English. I can communicate in English but writing a quality article whicc competes with millions of articles written by native speakers?
Nah!
I had to create complicated schemes with native speaker from Great Britain and USA to get a few of my articles edited to degree where they could be submitted (and accepted) by huge portals with rigorous rules about language quality.
Enter Grammarly.
It’s an online service and app avaliable here:
I will show you a difference between my article (published on less demanding service ten years ago) that was unpublished due the death of the service for many years, and the same article republished at different address a few hours ago.
This is the Grammarly’s analyse at the begining:
As you can notice, there is a large area, where you can copy-paste the article. There is a possibility to write right into it, but I advice against that. It can be a very stressful experience.
Right side of the screen is reserved for different options and I will point only at three of them:
1. Overall score.
This is a number between 0 and 100 where more is better. In general, everything above 80 is considered as a quality stuff. As you can see my score is just 36.
2. Suggestions.
There are four types of suggestions and not all of them are available in free version. I focus just on correctness and clarity, in most cases following all suggestions on correctness and mostly ignoring suggestions on clarity.
3. Premium
Yes, there is a premium/payable version. I can’t afford it at the moment. The investment would simply not be justified according to the money earned by writing for web.
This is how things look after two minutes of editing (mostly following the Grammarly’s suggestions):
As you an see, my overall score is 80. With premium version there would be more than 50 more suggestion, probably putting the score at 98 or more. Some of these suggestions, like punctuation, could be guessed by trial and error method but I decided to not bother ewith this for that particular article, aiming just to blogosphere.
Conclusion: I cordially recommend you to use Grammarly, especially if you are not a native speaker. It helps me tremendously with placing articles (not used in my native language), finding spelling errors and typos, staying faithful to the usage of the right tense in the sentence, …
All in all, great stuff.
And it’s only fair to give you an access to this article at the current position:
https://plaza.rakuten.co.jp/didyouknow/diary/202310310000/
Yep, it has pictures as well. Enjoy!