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Browser Extensions · head to head

Capital One Shopping vs ProWritingAid

Capital One Shopping logo

Capital One Shopping

Browser Extensions

Automatically save while you shop

From
Free
Rated
-
Full reviewWebsite
ProWritingAid logo

ProWritingAid

Browser Extensions

AI writing assistant and grammar checker

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Capital One Shopping limited to coupon and price comparison features, no true cashback rewards; ProWritingAid free plan limited to 500 word count with only 2 report runs per day
  • They diverge on capability: Capital One Shopping covers Price comparison, ProWritingAid covers Grammar checking.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Capital One Shopping and ProWritingAid actually diverge.

Attributes where Capital One Shopping and ProWritingAid differ
AttributeCapital One ShoppingProWritingAid
Pricing modelUnknownfreemium
PlatformsWeb, iOS, AndroidWeb, Windows, Mac, Chrome, Firefox, Edge
Founded20142013

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Browser Extensions).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Capital One Shopping

  • Price comparison
  • Coupon finder
  • Price tracking
  • Credits rewards

Only in ProWritingAid

  • Grammar checking
  • Style analysis
  • Readability reports
  • Plagiarism checker

Both cover

  • Chrome support
  • Firefox support
  • Edge support
  • Safari support

What people use each for

The jobs each tool is most often brought in to do.

Capital One Shopping

  • Automatically applying coupon codes at checkoutnot ProWritingAid
  • Tracking price drops on itemsnot ProWritingAid
  • Earning category-based cashback on purchasesnot ProWritingAid

ProWritingAid

  • Grammar and style checking for writers and authorsnot Capital One Shopping
  • Story planning and structure analysisnot Capital One Shopping
  • Character and manuscript analysis for fiction writersnot Capital One Shopping
  • Integration with Microsoft Word, Google Docs, Scrivener, and Notionnot Capital One Shopping

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Capital One Shopping

  • Limited to coupon and price comparison features, no true cashback rewards
  • Dependent on retailers offering coupons or price matching
  • Browser extension adds processing overhead to shopping sessions

ProWritingAid

  • Free plan limited to 500 word count with only 2 report runs per day
  • Advanced AI features (50 Sparks per day, Chapter Critiques) only in Premium Pro tier
  • Desktop apps for Mac and Windows; iOS/Android support limited to specific integrations
  • Yearly subscriptions significantly more cost-effective than monthly (67% savings)

Pricing, plan by plan

Capital One Shopping

Free

No published plan breakdown. See the Capital One Shopping review.

ProWritingAid

Free
  • FreeFree
    • Basic grammar and spelling checks
    • 500-word limit per check
    • 2 report runs daily
  • Premium$30/month
    • Unlimited word count
    • Unlimited rephrases
    • 5 Sparks daily
  • Premium Pro$36/month
    • All Premium features
    • 50 Sparks daily
    • 3 Chapter Critiques daily

Which should you pick?

Choose Capital One Shopping if

  • You need price comparison.
  • You want to start without paying.
  • You work on Web, iOS, Android.
  • You also want coupon finder.
Capital One Shopping review

Choose ProWritingAid if

  • You need grammar checking.
  • You want to start without paying.
  • You work on Web, Windows, Mac, Chrome, Firefox, Edge.
  • You also want style analysis.
ProWritingAid review

Questions people ask

Is Capital One Shopping or ProWritingAid better?
Neither clearly leads. Capital One Shopping starts at Free and ProWritingAid at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Capital One Shopping or ProWritingAid?
Capital One Shopping starts at Free and ProWritingAid at Free.
Does Capital One Shopping or ProWritingAid run on more platforms?
Capital One Shopping runs on Web, iOS, Android. ProWritingAid runs on Web, Windows, Mac, Chrome, Firefox, Edge.
Can I use Capital One Shopping for free?
Both have a free tier, so you can try either at no cost before committing.
What is Capital One Shopping best used for?
Capital One Shopping is most often used for automatically applying coupon codes at checkout, tracking price drops on items, earning category-based cashback on purchases. Of those, automatically applying coupon codes at checkout and tracking price drops on items are not what ProWritingAid is typically brought in for.
What can Capital One Shopping do that ProWritingAid cannot?
Capital One Shopping covers Price comparison, Coupon finder, Price tracking, Credits rewards. ProWritingAid covers Grammar checking, Style analysis, Readability reports, Plagiarism checker. Both handle Chrome support, Firefox support, Edge support, Safari support.

Answered from the vendors’ own pages

Capital One Shopping: Is Capital One Shopping free?

Yes. Capital One Shopping is 100% free to install and use on desktop or mobile. There are no fees or charges.

Source
ProWritingAid: How much does ProWritingAid cost?

ProWritingAid is free. Premium plan costs $30/month ($120/year), and Premium Pro costs $36/month ($144/year). Both yearly plans offer significant monthly savings. Lifetime options cost $399 (Premium) or $699 (Premium Pro).

Source
Capital One Shopping: Does Capital One Shopping require a Capital One account?

No. Capital One Shopping is free for everyone, including people who are not Capital One customers.

Source
ProWritingAid: Is there a free version of ProWritingAid?

Yes. The free plan includes basic grammar and spelling checks with a 500-word limit per check, 2 report runs daily, 10 rephrases daily, and 3 Sparks daily.

Source
Capital One Shopping: What platforms does Capital One Shopping support?

Capital One Shopping is available as a browser extension for desktop browsers and as a mobile app for iOS and Android.

ProWritingAid: What is the difference between Premium and Premium Pro?

Premium ($30/month) includes 25+ analysis reports and 1 Chapter Critique daily. Premium Pro ($36/month) adds 50 Sparks daily, 3 Chapter Critiques daily, live workshops, and group critique sessions.

Source
ProWritingAid: Does ProWritingAid offer a refund guarantee?

ProWritingAid offers a 3-day money-back guarantee for yearly and lifetime subscriptions. Monthly plans have no refund option.

Source
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