ATOS Analyzer vs Flesch-Kincaid Calculator
ATOS Analyzer
renaissance.comFlesch-Kincaid Calculator
flesch-kincaid-calculator.comSide by side
| Figure | ATOS Analyzer | Flesch-Kincaid Calculator |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Readability Checkers | 8.4 (#5) | 7.3 (#22) |
| Intended users | Renaissance describes ATOS as a readability measure designed to guide students to appropriate-level books. | The site describes the calculator as useful for content teams, educators, agencies, and public-sector writers. |
| Security | Renaissance says it implements and continuously improves physical, technical, and administrative safeguards for information security and data privacy. | The site says it implements technical and organizational security measures but does not guarantee absolute security. |
Plans
In their own words
ATOS Analyzer
ATOS Analyzer is a free web tool for estimating the readability level of text and books in English or Spanish. Users can enter a passage, analyze an entire book, or submit a sample with an estimated word count. Text can be typed or uploaded as a .txt, .docx, or .epub file, with uploads limited to 10 MB. The suggested passage length is 150 to 25,000 characters. Results include an ATOS level, grade-level equivalent, word count, AR Points, average word length, average sentence length, and language. ATOS estimates complexity on a grade-level scale using sentence length, word length, and word difficulty; its measure also accounts for book length. For a sampled book, Renaissance recommends three passages of about 150 words from different parts and an estimated total word count. Scanned documents need OCR to become recognized text before submission; changing a file extension does not convert them. The page includes a CCSS/ATOS grade-band chart for grades 1 through 12. Renaissance presents the measure as guidance for matching students with appropriately leveled reading material.
Flesch-Kincaid Calculator
Flesch-Kincaid Calculator has no write-up on Specifiction yet; its figures are above.