Best Readability Checkers in 2026
Updated
In short: ProWritingAid is ranked #1 of 25 as of 4 October 2026, ahead of TextGears and AnchorKite Readability Checker. The best-ranked option with a free plan is TextGears. The lowest first paid tier on this page is Hemingway Editor at $0.69/mo.
When reviewing text for readability, consider both the measurements a tool offers and the kind of feedback it provides. Compare readability formulas with sentence analysis and clarity recommendations, and check language support if you work across languages. The ranking begins with Check Readability, Hemingway Editor and ProWritingAid, with Readability Formulas and Text Inspector also among the early entries. A browser extension may affect how you access checks while writing, while API access is worth comparing for programmatic use. Review free-plan availability and paid-from pricing alongside these features to see which options fit your writing and review needs.
25 readability checkers ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 ProWritingAid No phone app RecognisedPhone appDocumentedFree plan 6.4$10/mo
- 2 TextGears No phone app RecognisedPhone appDocumentedFree plan 6.3$2.48/mo
- 3 AnchorKite Readability Checker No phone app RecognisedPhone appDocumentedFree plan 6.2Free Readability formulas: 6 formulasSentence analysis: YesClarity recommendations: Yes
- 4 Check Readability No phone app RecognisedPhone appDocumentedFree plan 6.2Free Readability formulas: 9 formulasSentence analysis: YesClarity recommendations: Yes
- 5 Readability Formulas No phone app RecognisedPhone appDocumentedFree plan 6.2Free Sentence analysis: YesClarity recommendations: Yes
- 6 Text Inspector No phone app RecognisedPhone appDocumentedFree plan 6.2Free Readability formulas: 3 formulasSentence analysis: YesClarity recommendations: Yes
- 7 Delimiter Readability Checker No phone app RecognisedPhone appDocumentedFree plan 6.1Free Readability formulas: 3 formulasSentence analysis: YesClarity recommendations: Yes
- 8 Slick Write No phone app RecognisedPhone appDocumentedFree plan 5.9Free
- 9 Hemingway Editor No phone app RecognisedPhone appDocumentedFree plan 5.8$0.69/mo
- 10 Readable No phone app RecognisedPhone appDocumentedFree plan 5.4$12/mo Readability formulas: 17 formulasSentence analysis: YesClarity recommendations: Yes
- 11 ApyHub Readability Scores Documents API No phone app RecognisedPhone appDocumentedFree plan 5.3 Readability formulas: 2 formulasSentence analysis: Yes
- 12 Botoi Readability API No phone app RecognisedPhone appDocumentedFree plan 5.3 Readability formulas: 3 formulasSentence analysis: Yes
- 13 Readability Analysis Tool (RAT) No phone app RecognisedPhone appDocumentedFree plan 5.3 Readability formulas: 2 formulasSentence analysis: Yes
- 14 ATOS Analyzer No phone app RecognisedPhone appDocumentedFree plan 5.2 Sentence analysis: Yes
- 15 DO101 Readability Checker No phone app RecognisedPhone appDocumentedFree plan 5.2 Readability formulas: 6 formulasSentence analysis: Yes
- 16 Flesch-Kincaid Readability & Grade Level Analyzer No phone app RecognisedPhone appDocumentedFree plan 5.2 Sentence analysis: YesClarity recommendations: Yes
- 17 Readability.ch No phone app RecognisedPhone appDocumentedFree plan 5.2 Sentence analysis: YesClarity recommendations: Yes
- 18 ReadabilityTool No phone app RecognisedPhone appDocumentedFree plan 5.2 Readability formulas: 6 formulasSentence analysis: YesClarity recommendations: Yes
- 19 StyleWriter No phone app RecognisedPhone appDocumentedFree plan 5.2$90/mo
- 20 Analyze My Writing No phone app RecognisedPhone appDocumentedFree plan 5.1 Sentence analysis: Yes
- 21 Data·yze Readability Analyzer No phone app RecognisedPhone appDocumentedFree plan 5.1 Sentence analysis: YesClarity recommendations: Yes
- 22 Eclipse Readability Studio No phone app RecognisedPhone appDocumentedFree plan 5.1 Clarity recommendations: Yes
- 23 Flesch-Kincaid Calculator No phone app RecognisedPhone appDocumentedFree plan 5.1 Sentence analysis: YesClarity recommendations: Yes
- 24 UsingEnglish Text Analyser No phone app RecognisedPhone appDocumentedFree plan 5.1 Sentence analysis: Yes
- 25 Orwellix No phone app RecognisedPhone appDocumentedFree plan 5.0 Sentence analysis: YesClarity recommendations: Yes
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which readability checker is ranked first on Samsung Mobile US Press?
ProWritingAid is ranked #1 of 25 with a score of 6.4. TextGears is second and AnchorKite Readability Checker third.
How many of these have a free plan?
8 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Hemingway Editor has the lowest first paid tier we found: $0.69/mo.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.