A primer on language inputUpdated 2026-11-09

About

About this site

What Is Comprehensible Input? is a free guide published by Jibber Jabber, a language-learning app built on comprehensible input. This page explains who we are and how we work.

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Who publishes this site

This site is published by Jibber Jabber. Jibber Jabber is a language-learning app that teaches with comprehensible input: real videos with interactive captions and vocabulary.

We publish a small group of guides about comprehensible input. Each site covers one language or topic. See how our sites connect.

How we write and check guides

  • We write for learners, in plain English.
  • We use official sources for app features and prices. We state limits when we cannot check a claim.
  • We link to our sources at the end of each page.
  • We describe hour counts and levels as rough guides from learner experience, not as promises.
  • We distinguish a primary text, a research review, a descriptive report, and a learner anecdote.
  • A catalog or reference-list link checks a publication's details. It does not mean that the full text was available.

For this site, we checked Krashen's 1982 primary text. We checked publication details for the 1985 book, Swain's output chapter, Long's interaction chapter, and Schmidt's noticing article against library or publisher records. Our research guide is a selective introduction, not a systematic review. It does not test Jibber Jabber or prove an input-only method.

How we treat our own app

We make Jibber Jabber, so we are not neutral. We include it where it fits, we say that it is ours, and we name other tools when they are a better fit for a need. Jibber Jabber pricing is public.

Corrections

If you find a mistake, tell us through the Jibber Jabber contact page. We update the page and its "updated" date.

Sources

  1. Krashen, S. D. (1982). Principles and Practice in Second Language Acquisition. Pergamon. Internet edition, 2009. Primary text; chapter II explains the five hypotheses.
  2. Jibber Jabber product facts

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Cite this page

Jibber Jabber. "About this site." What Is Comprehensible Input?, updated 2026-11-09. https://whatiscomprehensibleinput.com/about/

How the related sites connect

This guide is one of a collection published by Jibber Jabber. The sites share one publisher and are not independent endorsements. See the related websites.