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Head-to-head · Readability Checkers

Eclipse Readability Studio vs Readability Formulas

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Eclipse Readability Studio #1 in Readability Checkers 9.4/10 Free plan Free plan✓ 1 of 4 features Visit site
Readability Formulas #5 in Readability Checkers 8.6/10 Free plan Free plan✓ 3 of 4 features Visit site

Eclipse Readability Studio leads on 0 checks, Readability Formulas on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreEclipse Readability Studio · 9.4/10
  • Free planboth
  • Most featuresReadability Formulas · 3 of 4

Eclipse Readability Studio scores higher on our rubric for readability checkers: 9.4 against 8.6 out of 10; our editors rank them #1 and #5.

On language support, Eclipse Readability Studio gives you Multilingual where Readability Formulas offers English.

Eclipse Readability Studio is the better fit for multilingual desktop and document analysis. Readability Formulas is the better fit for mature multi-formula readability analysis.

  • Eclipse Readability Studio fits best

    Multilingual desktop and document analysis

  • Readability Formulas fits best

    Mature multi-formula readability analysis

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Side by side

Feature Eclipse Readability Studio 9.4/10 Visit ↗ Readability Formulas 8.6/10 Visit ↗
At a glance
Editor score 9.4 8.6
Ranking #1 in Readability Checkers #5 in Readability Checkers
Best for Multilingual desktop and document analysis Mature multi-formula readability analysis
Pricing model Free Free plan + paid
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop Cloud, Desktop, Browser extension
Platforms Windows, macOS, Linux Web, Windows, macOS, Chrome extension
Support Docs Community, Docs
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Eclipse Readability Studio 1/4 · Readability Formulas 3/4
Sentence analysis Not checked yet ✓ (best)
Clarity recommendations ✓ ✓
Browser extension Not checked yet ✓ (best)
API access Not checked yet Not checked yet
Specs
Readability formulas Not checked yet Not checked yet
Language support Multilingual English
Our review
Pros
  • More than 60 readability tests across English, Spanish, and German
  • Batch and individual document analysis with improvement recommendations
  • Supports Word, OpenDocument, RTF, HTML, PostScript, and text files
  • Combines multiple readability formulas with consensus scoring.
  • Includes hard-word, wordiness, and detailed text statistics.
  • Supports batch processing, file imports, graphs, and browser scoring.
Cons
  • Language coverage is limited to English, Spanish, and German
  • Designed for desktop use on Windows, macOS, and Linux
  • Its feature set centers on document analysis rather than broader writing workflows
  • Language support is focused on English.
  • The product centers on analysis rather than broader writing workflows.
  • Readability Calculations and Readability PLUS are separate software offerings.
Our verdict

Eclipse Readability Studio is a free, open-source desktop application for evaluating document readability and grammar. It is aimed at educators, government and military teams, healthcare organizations, publishers, and students who need…

Read the review →

Readability Formulas is a readability analysis toolkit for writers, editors, educators, marketers, healthcare providers, and government agencies. It evaluates text difficulty, reading grade level, sentence length, word usage, and…

Read the review →
  1. Eclipse Readability StudioReadability Checkers 9.4Free plan
  2. Readability FormulasReadability Checkers 8.6Free plan

Strengths and trade-offs

  • Eclipse Readability Studio — where it wins

    • More than 60 readability tests across English, Spanish, and German
    • Batch and individual document analysis with improvement recommendations
    • Supports Word, OpenDocument, RTF, HTML, PostScript, and text files

    Where it doesn't

    • Language coverage is limited to English, Spanish, and German
    • Designed for desktop use on Windows, macOS, and Linux
    • Its feature set centers on document analysis rather than broader writing workflows

  • Readability Formulas — where it wins

    • Combines multiple readability formulas with consensus scoring.
    • Includes hard-word, wordiness, and detailed text statistics.
    • Supports batch processing, file imports, graphs, and browser scoring.

    Where it doesn't

    • Language support is focused on English.
    • The product centers on analysis rather than broader writing workflows.
    • Readability Calculations and Readability PLUS are separate software offerings.
  • Eclipse Readability Studio9.4/10 · Free plan

    A free, open-source desktop checker for detailed multilingual document analysis.

    Visit siteFull verdict →
  • Readability Formulas8.6/10 · Free plan

    A mature readability toolkit for writers, editors, educators, and content teams.

    Visit siteFull 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