DO101 Readability Checker vs Readability.ch

DO101 Readability Checker

Figure	DO101 Readability Checker	Readability.ch
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 (#6)	7.2 (#23)
Offline use	After the writing page loads, its cached JavaScript can continue working without an internet connection.	The maker says analysis works offline after the page has loaded once.
Privacy	The tool runs entirely in the browser, and text is processed on the user’s device rather than uploaded by DO101.	The maker says calculations happen in the browser and text is never transmitted to or stored on a server.
Purpose	The checker measures text readability with six published formulas and sentence rhythm analysis.	Analyzes text with the Flesch formula and other readability indexes.
Sentence analysis	It shows sentence-length variance, a colour-coded bar for each sentence and a list of the longest sentences.	It colors sentences by readability as easy, medium, or hard.

DO101 Readability Checker has no write-up on Specifiction yet; its figures are above.

Readability.ch has no write-up on Specifiction yet; its figures are above.