Does Grammarly Improve Your Spelling? What It Fixes and What It Can't

You have Grammarly on your laptop, maybe on your phone keyboard too. The red lines appear, you accept the suggestions, and your emails go out clean. Yet the same words keep getting underlined month after month, and the moment you write anything without it, on a whiteboard, a paper form or a shared screen, you are back to guessing.

So does Grammarly improve your spelling? It improves the spelling of what you write. It does very little, on its own, to improve the spelling in your head. A checker hands you the right answer, and memory for spelling is built by producing the answer yourself. Used a little differently, though, the same tool becomes the best free list-maker a weak speller could ask for.

Below is what Grammarly, Microsoft Editor and your phone keyboard actually do, checked on their own websites in November 2026, and what the research on relying on them does and does not show. Then comes a two-week routine that turns each correction into a word you stop needing corrected.

What the checkers actually do

Grammarly checks your writing as you type in a browser, in its desktop app, and on your phone through the Grammarly Keyboard for iPhone and Android. As of November 2026 its free plan promises that you can "write without spelling and grammar mistakes", and a paid Pro plan adds more. Grammarly's spell-checker page says it does more than a basic dictionary check: it claims to flag a correctly spelled word used in the wrong context, giving "affect" and "effect" as its example. You hover over an underline and it offers the fix.

Microsoft Editor is the checker inside Word and Outlook on the web. Microsoft says the free version, with a Microsoft account, covers the basics of spelling and grammar, while a Microsoft 365 subscription adds style suggestions such as clarity and formality. One change worth knowing: Microsoft retired the Editor browser extensions for Edge and Chrome on October 31, 2025, and moved that help into Edge's own proofing tools.

Your phone keyboard goes a step further than either. On an iPhone, auto-correction lives under Settings, General, Keyboard. On Android phones that use Gboard, it sits under Text correction in the keyboard's settings, and Google's help page notes that misspelled words "might be corrected as you type". The phone does not underline and wait. It swaps the word, often before you have noticed there was anything to swap.

All three are good at their job, and the job is the same: make this piece of writing correct, now. None of them claims to teach you to spell, and it would be unfair to blame them for not doing something they were never built to do.

Why being corrected is not the same as learning

Think about what your memory does when a red line appears under "recieve". You see the underline. You hover. The tool shows you "receive". You click. At no point did you have to pull the right letters out of your own head, and that is the one step that builds spelling memory.

Psychologists call the difference recognition and recall. Recognizing the right spelling when it is shown to you is easy, and almost everyone can do it for words they routinely misspell. Recalling it, producing the letters from nothing, is harder, and it is the hard part that does the teaching. In a well-known 2006 study, Henry Roediger and Jeffrey Karpicke had students either reread a passage or try to recall it. A week later the students who had practiced recalling remembered far more, even though rereading had felt more productive at the time.

There is a second reason, specific to spelling. Linnea Ehri's research on orthographic mapping shows that a word's spelling is stored when you connect its letters to its sounds and meaning, one part at a time. To store "receive", you need to notice which sound the "ei" spells and where it sits in the word. A one-click fix skips the noticing. The correct word lands on the page and the old, wrong version stays exactly where it was in your memory.

This is why so many people find that years of clean emails have left their spelling exactly where it was. The tool did its work, and their memory was never asked to do any.

What the research on spell-checkers shows

Does Grammarly make your spelling worse? Probably not in the way people fear, but the honest answer is that nobody has measured it well. There is no large study that follows Grammarly users for years and compares their spelling with people who never used it. Anyone who tells you confidently that it ruins spelling, or that it improves it, is going past the evidence.

What research does show is that checkers change how carefully we look. In a small study published in 2005, Dennis Galletta and colleagues asked students to proofread a business letter with Microsoft Word's spelling and grammar checker on or off. With the checker on, students left more errors in place, partly because they trusted its silence and its suggestions. The students with strong verbal skills lost much of the advantage they showed without it. Checkers are far better now than in 2005, so the size of that effect today is unknown. The pattern, that we stop watching closely when a machine is watching for us, is the part worth remembering.

The likelier risk is subtler than damage. A checker makes it painless to never learn a word, so the same twenty words stay unlearned for decades. Our longer piece on why spell-check and autocorrect can make your spelling worse goes further into that research.

What it cannot see

Grammarly says it now catches wrong-word errors in context, such as "affect" and "effect", and checkers have improved a great deal. But some spelling problems are invisible to any checker, however clever, because they never reach the page as errors.

The first is the words you avoid. If you write "get" because you are not sure of "receive", or "careful" because "conscientious" scares you, the checker sees a perfectly correct sentence. It cannot flag a word you never typed. Many adults with shaky spelling have quietly shrunk their written vocabulary this way, and no tool will tell them so.

The second is the pause. You know the word, you have typed it a hundred times, and you still stop before "necessary" to think about the c and the s's. The checker sees the finished word and approves it. It cannot see the few seconds of doubt, or the way that doubt slows every email you write.

The third is every place the checker is not running: a whiteboard, a handwritten card, a paper form, an exam room, or a chat box in an app it does not support. Then there is the screen you share while colleagues watch. These are often the moments when your spelling is most visible.

And the fourth is names. A checker cannot know that your client spells her name Kathryn rather than Katherine, or that your company's product is spelled with one l. Both versions look fine to it.

Use the checker as a free diagnostic

This is where Grammarly becomes useful for your spelling rather than just your writing. Every time it corrects you, it is telling you something precise: this is a word you do not yet own, and this is the exact spot where your memory goes wrong. Most people throw that information away with a click. Collect it instead.

For two weeks, keep a note open on your phone or computer. Every time the checker or autocorrect fixes a word, write down the correct spelling and mark the letters you got wrong. If "definately" becomes "definitely", write "definitely" and mark the "ite". If "seperate" becomes "separate", mark the "a". Add a tally each time the same word comes back.

After two weeks, most people find the list is shorter and more repetitive than they expected. A handful of words account for most of the corrections, and each one tends to fail in the same place every time. That is useful, because it means you are not fixing your spelling in general. You are fixing a short, specific list.

While you are collecting, add the other two kinds of word the checker cannot see: every word you caught yourself avoiding, and every word that made you pause. Those belong on the list as much as the ones that were underlined. If you would like a fuller version of this exercise, our guide to finding your own worst spelling words walks through it.

Practice the words from memory, a little and often

A list does nothing sitting in a note. The words need to be produced from memory, on several separate days, with the gaps between attempts growing.

Take five to ten words a day. For each one, hear it or say it, type it without looking, then check it letter by letter against the correct spelling. If you got it right, it comes back in a few days, then in a week, then in two. If you missed it, look hard at the exact letter, and try again tomorrow. A word is done when you have spelled it correctly on three separate days at least a week apart.

When you look at the missed spot, find a reason for it if one exists. "Definitely" contains "finite", and "finite" shows you the i that people swap for an a. "Occurred" doubles its r because the stress falls on the second syllable, the same reason "referred" does. A reason gives the letter something to hang on, which a blind repeat does not.

Our guide to making a personal spelling list that actually changes your writing covers how to keep the list short and when to retire a word. If you would rather not run the schedule yourself, Spelling.School does this part for you. A recorded voice says the word, you type it, and it shows which letters went wrong, then brings the word back at growing intervals.

Change how you use Grammarly, starting today

You do not have to uninstall anything. A few small changes turn the checker from something that does your spelling into something that coaches it.

Try before you hover. When a red line appears, stop for two seconds and try to fix the word yourself. Then check your attempt against the suggestion. That tiny pause turns recognition into recall, with instant feedback, which is exactly the kind of practice that builds memory.

Type the fix rather than clicking it. If your attempt was wrong, delete the word and type the correct spelling yourself instead of accepting the suggestion. It takes a second longer and makes your fingers and memory produce the right letters once.

Write first, check afterwards. For anything that is not urgent, draft with the underlines ignored, then go through them at the end. You will see all your errors in one place, which makes the patterns easier to notice.

Turn off phone auto-correction for a while, if you can bear it. It is the one tool that removes your errors before you see them. Switching it off for a month makes every mistake visible, and every visible mistake is a chance to learn the word. If that is too irritating on a phone, keep it off on the device where you write most.

Free or paid, if spelling is the worry

For spelling alone, paying is probably not worth it. As of November 2026, Grammarly's free plan covers spelling and grammar mistakes, and Microsoft's free Editor covers basic spelling in Word for the web. Grammarly Pro adds sentence rewrites, tone adjustment and plagiarism checks, and Microsoft 365 adds style suggestions such as clarity and formality. Those are useful for some writers but do nothing more for the spelling in your memory.

If spelling is your main worry, a better use of the money and the time is practice that makes you produce the words. Keep the free checker as a safety net and a source of words for your list. For the comparison from the other direction, our post on whether Duolingo teaches spelling looks at another popular tool that helps with English without teaching spelling directly.

What to do next

Open a note today and call it something dull. For the next two weeks, every time Grammarly, Editor or your phone corrects a word, write the correct spelling in the note and mark the letter you missed. Add every word you avoided and every word that made you pause.

At the end of the two weeks, pick the five words with the most tallies and spell them from memory for a few minutes a day, with longer gaps each time you get one right. To feel what practice from memory is like before you start, spell five words on the home page with no sign-up, or look up the trap in a single word, such as receive or separate.

Keep the checker. Just stop letting it do all the remembering.

Questions people ask

Does Grammarly make your spelling worse?

There is no good long-term study showing that Grammarly makes spelling worse, so nobody can say so with confidence. Research on older spell-checkers found that people trust the software and look less carefully themselves. The likelier problem is that a checker makes it painless never to learn the words you misspell, so the same errors keep coming back for years.

Can Grammarly teach you to spell?

Not on its own. Grammarly shows you the correct spelling, and you accept it, so your memory never has to produce the word, which is the step that builds spelling memory. You can make it useful for learning by trying to fix each underlined word yourself before looking at the suggestion, and by keeping a list of the words it corrects to practice from memory.

Does autocorrect stop you learning spelling?

Autocorrect can get in the way of learning, because it replaces a misspelled word before you see the mistake, so you get neither the practice of producing the spelling nor the feedback of noticing the error. Turning off automatic replacement on the device where you write most, for a month or so, makes your mistakes visible. Each visible mistake can then go on a practice list.

Is Grammarly worth it if I'm bad at spelling?

For spelling alone, the free version is enough for most people, because as of November 2026 Grammarly's free plan covers spelling and grammar mistakes. The paid Pro plan mainly adds sentence rewrites, tone adjustment and plagiarism checks. If spelling is the worry, spend the effort on practice from memory, using the words Grammarly corrects as your list.

What errors does Grammarly miss?

Grammarly says it catches many wrong-word errors in context, such as affect and effect, but no checker can see a word you avoided writing, the pause before a word you are unsure of, or a name it has never met. It also cannot help anywhere it is not running, such as handwriting, paper forms, whiteboards or exams. Proofreading important writing slowly, ideally aloud, catches some of what remains.

How do I learn from Grammarly corrections?

Keep a note open for two weeks and write down every word Grammarly corrects, marking the exact letters you got wrong and adding a tally when a word comes back. Then practice the most frequent words from memory for a few minutes a day, on separate days, with longer gaps each time you get a word right. Most people find a handful of words account for most of their corrections.

Fix the words you actually get wrong

A few minutes a day, spaced repetition, built only for spelling. Try five words without signing up.