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Head-to-head · Readability Checkers

Check Readability vs ApyHub Readability Scores Documents API

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Check Readability #3 in Readability Checkers 9.0/10 Free plan Free plan✓ 3 of 4 features Visit site
ApyHub Readability Scores Documents API #8 in Readability Checkers 7.8/10 Free plan Free plan✓ 2 of 4 features Visit ApyHub

Check Readability leads on 1 check, ApyHub Readability Scores Documents API on 0, and 5 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreCheck Readability · 9.0/10
  • Free planboth
  • Most featuresCheck Readability · 3 of 4

Check Readability scores higher on our rubric for readability checkers: 9.0 against 7.8 out of 10; our editors rank them #3 and #8.

Check Readability leads on readability formulas: 9 formulas versus 2 formulas. On language support, ApyHub Readability Scores Documents API gives you Multilingual where Check Readability offers English.

Check Readability is the better fit for free browser-based readability checking. ApyHub Readability Scores Documents API is the better fit for developers analyzing uploaded documents by API.

  • Check Readability fits best

    Free browser-based readability checking

  • ApyHub Readability Scores Documents API fits best

    Developers analyzing uploaded documents by API

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Side by side

Feature Check Readability 9.0/10 Visit ↗ ApyHub Readability Scores Documents API 7.8/10 Visit ↗
At a glance
Editor score 9.0 7.8
Ranking #3 in Readability Checkers #8 in Readability Checkers
Best for Free browser-based readability checking Developers analyzing uploaded documents by API
Pricing model Free Free plan + paid
Starting price Free $16/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Browser extension Cloud
Support Email Email, Live chat, Community, Docs · 24/7
Built for Solo, Small business Solo, Small business, Mid-market, Enterprise
Features Check Readability 3/4 · ApyHub Readability Scores Documents API 2/4
Sentence analysis ✓ ✓
Clarity recommendations ✓ (best) Not checked yet
Browser extension ✓ (best) Not checked yet
API access Not checked yet ✓ (best)
Specs
Readability formulas 9 formulas (best) 2 formulas
Language support English Multilingual
Our review
Pros
  • Nine readability formulas plus a consensus grade level
  • Actionable guidance on sentence length, complexity, and word choice
  • Chrome extension analyzes selected text and full webpages
  • Analyzes PDF, DOC, DOCX files and public webpage URLs
  • Combines two readability formulas with detailed text metrics
  • Offers a free tier and paid access from $16 per month
Cons
  • English-language analysis only
  • Chrome extension is specific to the Chrome browser
  • Focused on readability metrics rather than broader editing tools
  • Designed for API workflows rather than a standalone user interface
  • Analysis language options are limited to English and German
  • The Starter plan includes 3,000 atoms per month
Our verdict

Check Readability is a free web-based checker for content creators, copywriters, SEO specialists, educators, legal professionals, editors, and researchers. Users can type or paste text into its web editor and receive results from nine…

Read the review →

ApyHub Readability Scores Documents API is built for developers adding readability analysis to content review, editorial quality assurance, SEO, or publishing workflows. It accepts uploaded PDF, DOC, and DOCX files, as well as publicly…

Read the review →
  1. Check ReadabilityReadability Checkers 9.0Free plan
  2. ApyHub Readability Scores Documents APIReadability Checkers 7.8Free plan

Strengths and trade-offs

  • Check Readability — where it wins

    • Nine readability formulas plus a consensus grade level
    • Actionable guidance on sentence length, complexity, and word choice
    • Chrome extension analyzes selected text and full webpages

    Where it doesn't

    • English-language analysis only
    • Chrome extension is specific to the Chrome browser
    • Focused on readability metrics rather than broader editing tools

  • ApyHub Readability Scores Documents API — where it wins

    • Analyzes PDF, DOC, DOCX files and public webpage URLs
    • Combines two readability formulas with detailed text metrics
    • Offers a free tier and paid access from $16 per month

    Where it doesn't

    • Designed for API workflows rather than a standalone user interface
    • Analysis language options are limited to English and German
    • The Starter plan includes 3,000 atoms per month
  • Check Readability9.0/10 · Free plan

    A free browser checker combining nine formulas with practical clarity guidance.

    Visit siteFull verdict →
  • ApyHub Readability Scores Documents API7.8/10 · Free plan

    A developer-focused API for readability scores, text metrics, and time estimates.

    Visit ApyHubFull verdict →

More comparisons

All readability checkers comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update