dyslexiaProWritingAid Premium costs $120 a year, and Grammarly Pro costs $144 (ProWritingAid pricing page and Grammarly Support, checked 20 October 2026). That $24 gap is the whole price argument, and it disappears if you pick ProWritingAid's $144 Premium Pro plan. The useful question for a dyslexic writer is what each plan actually gives you for the money.
The prices side by side
Both vendors price in US dollars on the pages I checked. Neither page lists pounds. Grammarly says regional prices in pounds and euros show at checkout, so your UK price may differ from the numbers below.
| Plan | Monthly | Yearly | Lifetime |
|---|---|---|---|
| ProWritingAid Premium | $30 | $120 | $399 |
| ProWritingAid Premium Pro | $36 | $144 | $699 |
| Grammarly Pro | $30 | $144 | Not listed |
Grammarly also sells a quarterly plan at $60 for three months. ProWritingAid has no quarterly tier. If you pay monthly, the two entry plans cost the same $30.
So what for you: pay yearly or not at all, because monthly billing turns a $120 tool into a $360 one.
What a lifetime licence does to the sum
ProWritingAid is the only one of the two with a one-time price on the pages I checked. Premium Lifetime is $399, which is 3.3 years of the $120 annual plan. Premium Pro Lifetime is $699, which beats $144 a year only after about 4.9 years.
Five years of Grammarly Pro at $144 a year, against ProWritingAid Premium Lifetime paid once. My arithmetic from the published prices, 20 October 2026.
A five-year example
Say you start a new job and keep the same writing tool for five years. Grammarly Pro costs $720 over that time. ProWritingAid Premium annual costs $600, and the lifetime licence costs $399.
The catch is that a lifetime licence lasts as long as the vendor sells the product, on the terms it sets. Tools get renamed and repriced. A $399 bet only pays off if you still want this exact tool in year four.
So what for you: buy lifetime only after a full year on the annual plan has proved you use the tool every week.
The free tiers decide it for many people
ProWritingAid Free checks 500 words at a time. You get 2 runs of each line-editing report per day and 10 rephrases a day (ProWritingAid pricing page, 20 October 2026). Grammarly Free has no document length cap and covers spelling, grammar and punctuation (Manuscript Report comparison, August 2026).
That 500-word limit matters more to you than to most writers. A 900-word status email goes through in two chunks, and you have to paste the second chunk back in and re-read the joins. If you already lose your place on screen, that extra step costs real time.
Grammarly's free spelling and grammar check is enough for a lot of people. It is also where the monthly bill starts if you want rewrites and tone suggestions. Free tiers change often, so treat these limits as a snapshot.
So what for you: run both free tiers on your last five real emails before you pay anyone anything.
Features that matter more than the price
ProWritingAid offers more than 20 separate writing reports, including style, repeated words and sentence length (CASRAI guide, August 2026). Grammarly works at sentence level and has no reports. Grammarly has a mobile keyboard for iOS and Android, and ProWritingAid does not (Manuscript Report comparison, August 2026).
Both work inside Word and Google Docs. If most of your writing happens on a phone, the keyboard decides the question. If you write long documents at a desk, the reports are the draw, though a screen of twenty reports can overwhelm a tired reader. Run one report at a time, starting with spelling and repeated words.
Neither pricing page I checked lists a read-aloud feature. Reading your own text aloud catches the errors a spell checker misses, such as a real word in the wrong place. Pair either tool with the free reader built into Word, which our Immersive Reader review covers.
Premium Pro costs $24 a year more than Premium, and the extra feature is plagiarism checking (CASRAI guide, August 2026). Most dyslexic employees writing emails and reports will not use it.
So what for you: choose between a phone keyboard and a report library, and skip the Pro tier unless you publish original writing.
Who should pay: you or your employer
In the UK, writing software can be a reasonable adjustment under the Equality Act 2010, which means your employer may have to provide it. Access to Work can also fund software in some cases, decided one application at a time. The Access to Work calculator shows what is worth asking for.
In the US, the Americans with Disabilities Act covers reasonable accommodation, and the Job Accommodation Network gives free guidance on requests. Do not mix the two systems in one request: name the law that applies where you work.
Whichever country you are in, ask before you buy. Self-funding can look like proof that you did not need the adjustment. Our disclosure guide covers how to word the request, and our Claude, ChatGPT and Grammarly comparison covers the AI side of the same decision.
So what for you: put the tool, the task it helps with and the price in one dated email to your manager before you open your own wallet.
What this means for you
If you write long documents on a laptop, start the ProWritingAid Premium trial and take the $120 annual plan if the reports help. If you write mostly short messages or on a phone, Grammarly Pro at $144 is the better fit, because the keyboard is the difference. If you are still using ProWritingAid after a year, the $399 lifetime plan saves you money from year four.
Do not pay for Premium Pro unless you need plagiarism checks. Do not pay monthly for either. And if your employer can pay, make them: the same tool costs you nothing.
So what for you: spend a fortnight on the free tiers, then ask your employer for the one that won.
Frequently asked questions
Is ProWritingAid cheaper than Grammarly?
Yes at entry level: Premium is $120 a year against $144 for Grammarly Pro. The gap closes if you take Premium Pro at $144 a year.
Is ProWritingAid good for dyslexia?
Neither vendor's pricing page lists dyslexia-specific features. ProWritingAid has more than 20 reports that can catch repeated words and long sentences, so test it on your own writing before you pay.
Does ProWritingAid have a lifetime plan?
Yes. Premium Lifetime is $399 and Premium Pro Lifetime is $699, both one-time payments on its pricing page as of 20 October 2026.
Can Access to Work pay for writing software?
In the UK, Access to Work can fund software that removes a work barrier, decided case by case. Ask your assessor, and ask your employer too, because their duty under the Equality Act 2010 does not depend on the grant.
Not sure where to start? The dyslexia assessment cost guide covers UK and US prices in 2026 and what it means once your employer knows. Fill in the short form on that page and we will find you a local assessor and reply within 2 working days.