Last update: 12. June 2025 - under construction, many programs still to be added

Descriptions of programs that use readability formulas

website: readability 0.3.2
formulas supported: Flesch-Kincaid, Ari, Colmena-Liau, Flesch Reading Ease, Lix, Rix, Smog, Dale-Chall (which version?)
country/state: Andreas van Cranenburgh
results: all readability formulas, no online tool available
output: text metrics: charecters, syllables, words, sentences, paragraphs, long words, complex words, char/word, ttr, syllables/words, sentences/paragraph, words/sentence, word usage, sentence beginnings,
remarks: This program is in beta status and written in Python. The source code is available. The texts can be written in English, German, or Dutch. You must consider that your text consists of sentences which are in separate lines - that means the program cannot split a text in grammatical sentences.

program: Readability App
author: Joe Silverstein
distributor: Soureforge, binaries and source available
formulas supported: Flesch Readability Ease, Flesch-Kincaid, Gunning-Fog, SMOG, and Coleman-Liau
documentation: none, but source code available for MS Windows, Mac OS, and Ubuntu
download: see distribution
operating system: MS-Windows, Mac OS, Ubuntu
description: not tested yet

<program: Readability Studio
author: Oleander Software, USA
distributor: Oleander software, Vandalia, OH, USA
documentation: self explaining
download: none, no trial, demo or test version available, but updates for users for the 2024 versions
operating system: MS-Windows, Mac OS
description: Lots of formulas for English, spanish, and German. No trial, test or demo version available. Especially the readability formulas implemented for Spanish and German are the same that are implemented in TextQuest 4.2 and TextQuest/ReFo.

program: StyleWriter V 4
author: Joe Silverstein
distributor: trial version
formulas supported: BOG-Index
documentation: videos
download: 14 days free tral version, versions for UK, USA, and Australia
operating system: MS-Windows
description: not tested yet
remarks: The BOG-Index is explained, but some terms are not defined, e.g. interesting words, heavy words, wordiness, word difficulty

program: Textalyzer
author: Bernhard Huber
distributor: SEOScout
documentation: self explaining
download: none
operating system: runs on a web site
description: Textalyser is a free text analysis tool that counts words, sentences, syllables, and lexical density. It also computes the Gunning readability index. A small but nice tool that counts syllables correct at least for English, French, and German. You can cut and paste text or specify a web page.

program: TextQuest/Refo
author: Harald Klein
distributor: Social Science Consulting, Osnabrück, Germany
documentation: Presentation of the main features, manual is part of the trial version
download: test version for 30 days
operating system: MS-Windows, Mac-OS supporting M-chips
description: TextQuest/ReFo can analyze texts of any size using readability formulas. Depending on language, text genre, and recipients the appropriate formulas are used. The results are for the whole text and for each paragraph. Export of the data is possible via clipboard (CSV, JSON files). Supported languages are: English, French, German, Spanish, Italian, Dutch, Afrikaans, Turkish, Polish, Danish, Norwegian, Icelandic, Swedish, Czech, Croatian, Slovak, Slovenian. Supported recipients are: children, young people, adults, foreign learners, soldiers, patients. Supported text genres are: fictional, non-fictional, technical manuals, school books, children's books. The vocabulary module in the Professional version also generates word lists, collocations, and word permutations - all lists can be sorted by alphabet or frequency, stop words are provided.