Best AI Readability Checkers in 2026
Updated
In short: ToolsVale Readability Checker is ranked #1 of 25 as of 4 October 2026, ahead of Health Literacy Advisor and A2Z Tools Plain Language Analyzer. The best-ranked option with a free plan is A2Z Tools Plain Language Analyzer. The lowest first paid tier on this page is Hemingway Editor at $0.69/mo.
If you want to assess how approachable text may be, compare what each checker measures and the kinds of feedback it offers. Readability scores, grade-level analysis, and sentence complexity provide different points of comparison; plain-language rewrites and accessibility guidance may also matter for your readers. Check supported input formats, plus free plan availability and paid-from pricing. ToolsVale Readability Checker, Hemingway Editor, and eReadable lead the ranking, followed by Health Literacy Advisor and A2Z Tools Plain Language Analyzer. Consider the material you plan to review and which measures or guidance would be useful before comparing the ranked entries.
25 AI 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 ToolsVale Readability Checker iPhone + Android RecognisedPhone appDocumentedFree plan 7.8Free Readability scores: 7 scoresGrade-level analysis: YesSentence complexity: Yes
- 2 Health Literacy Advisor iPhone + Android RecognisedPhone appDocumentedFree plan 7.1$41.58/mo Readability scores: 9 scoresGrade-level analysis: YesSentence complexity: Yes
- 3 A2Z Tools Plain Language Analyzer No phone app RecognisedPhone appDocumentedFree plan 6.3Free Grade-level analysis: YesSentence complexity: Yes
- 4 Text Inspector No phone app RecognisedPhone appDocumentedFree plan 6.3Free
- 5 AI Readability Checker No phone app RecognisedPhone appDocumentedFree plan 6.2Free Sentence complexity: Yes
- 6 eReadable No phone app RecognisedPhone appDocumentedFree plan 6.2Free Grade-level analysis: YesSentence complexity: Yes
- 7 Etoolio Easy Read Checker No phone app RecognisedPhone appDocumentedFree plan 6.2Free Grade-level analysis: YesSentence complexity: Yes
- 8 Readability Formulas No phone app RecognisedPhone appDocumentedFree plan 6.2Free
- 9 WebFX Readability Test Tool No phone app RecognisedPhone appDocumentedFree plan 6.2Free Readability scores: 6 scoresGrade-level analysis: YesSentence complexity: Yes
- 10 Hemingway Editor No phone app RecognisedPhone appDocumentedFree plan 5.9$0.69/mo
- 11 VT Writer No phone app RecognisedPhone appDocumentedFree plan 5.5 Grade-level analysis: YesSentence complexity: Yes
- 12 APIVerve Website Readability API No phone app RecognisedPhone appDocumentedFree plan 5.4 Readability scores: 8 scoresGrade-level analysis: Yes
- 13 Readable No phone app RecognisedPhone appDocumentedFree plan 5.4$12/mo
- 14 Tensetti Plain Language Checker No phone app RecognisedPhone appDocumentedFree plan 5.4 Readability scores: 0 scoresGrade-level analysis: NoSentence complexity: Yes
- 15 Readability No phone app RecognisedPhone appDocumentedFree plan 5.3 Grade-level analysis: YesSentence complexity: Yes
- 16 AI Readability No phone app RecognisedPhone appDocumentedFree plan 5.2 Sentence complexity: Yes
- 17 Oanor Readability API No phone app RecognisedPhone appDocumentedFree plan 5.2 Readability scores: 6 scoresGrade-level analysis: Yes
- 18 PageRefine No phone app RecognisedPhone appDocumentedFree plan 5.2 Sentence complexity: Yes
- 19 textstat No phone app RecognisedPhone appDocumentedFree plan 5.2 Grade-level analysis: Yes
- 20 ApyHub Readability Scores Documents API No phone app RecognisedPhone appDocumentedFree plan 5.1
- 21 Botoi Readability API No phone app RecognisedPhone appDocumentedFree plan 5.1
- 22 ProfText No phone app RecognisedPhone appDocumentedFree plan 5.1
- 23 Readability Analysis Tool (RAT) No phone app RecognisedPhone appDocumentedFree plan 5.1
- 24 StyleWriter No phone app RecognisedPhone appDocumentedFree plan 5.1 Readability scores: 9 scoresGrade-level analysis: YesSentence complexity: Yes
- 25 Eclipse Readability Studio No phone app RecognisedPhone appDocumentedFree plan 4.9
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 AI readability checker is ranked first on Samsung Mobile US Press?
ToolsVale Readability Checker is ranked #1 of 25 with a score of 7.8. Health Literacy Advisor is second and A2Z Tools Plain Language Analyzer 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.