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About SumAI : Built to help you know more.

SumAI is an AI summarizer app for iPhone and iPad that turns YouTube videos, web pages and PDFs into clear summaries in seconds. It is an independent app, first released in November 2024, built around one idea: you should be able to get the substance of a long video or document quickly, and then actually keep it.

Download SumAI on the App Store

What we believe

Four principles behind the app

  • A summary is a way in

    It tells you what a source says and where to look. It does not replace the parts that matter to you, and we will never pretend it does.

  • Always show the source

    Timestamps, key moments and the full transcript are there so that checking a point takes seconds, not a rewatch.

  • Understanding is not remembering

    That is why every summary comes with a quiz and flashcards. Testing yourself is what makes knowledge stay.

  • Say what it cannot do

    Videos need captions. PDFs need selectable text. Any AI summary can miss a nuance. We would rather tell you first.

What SumAI does

You paste a YouTube link or a web link, or pick a PDF. You choose a summary style and a language. SumAI reads the whole source (the transcript of a video, or the text of an article or document) and writes a structured summary in seconds.

From there, each summary opens up:

Summaries can be written in more than 60 languages and read aloud.

Who it is for

Students turning lectures and readings into study guides. Professionals catching up on talks, reports and articles. Researchers screening papers. Language learners using real videos. And curious people with a long Watch Later list.

Version history

Version 2.0 October 2026
The biggest update so far. Added summaries of web pages and PDFs, Ask AI chat with tappable timestamps, mind maps, the Chapters style, key moments, full transcripts, PDF and Markdown export, favorites and tags, sharing from YouTube and Safari, optional Sign in with Apple, a new design, and the app in German, French, Spanish, Portuguese, Italian, Japanese and Turkish.
Version 1.0 November 2024
SumAI launched on the App Store as an AI summarizer for YouTube videos.

Independence

SumAI is an independent app. It is not affiliated with, sponsored by or endorsed by YouTube or Google.

Contact

Questions, feedback or a correction to something on this site: email net29apps@gmail.com. For help using the app, see Support. Writing about SumAI? The press kit has descriptions, facts and images.

Get SumAI

Watch less. Know more.

SumAI is free to download for iPhone and iPad. Paste your first link and read the summary in seconds.

Download SumAI on the App Store
  • Free to download
  • iPhone and iPad
  • Requires iOS 16 or later

On a computer? Point your iPhone camera at the code to open SumAI in the App Store.