AI summarizer for iPhone & iPad

Watch less. Know more. AI summaries of YouTube videos, web pages and PDFs.

SumAI reads the whole video, article or document for you and hands back the key points in seconds. Then ask it questions, jump to the moments that matter, and make it stick with mind maps, quizzes and flashcards.

See how it works

Free to download
iPhone and iPad
Summaries in 60+ languages

In one sentence

What is SumAI?

SumAI is an AI summarizer app for iPhone and iPad that turns YouTube videos, web pages and PDFs into clear, structured summaries in seconds.

Paste a link or pick a PDF, choose a style and a language, and SumAI reads the whole thing for you: the transcript of a video, or the text of an article or document. You get the key points and the details that matter, so you can skip the hour-long video and get straight to what you need.

YouTube videos
Shorts
Live streams
Web articles
PDFs

Good to know: Videos need captions or auto-generated subtitles. PDFs need selectable text.

What it is: An AI summarizer app for YouTube videos, web articles and PDFs
Works on: iPhone (iOS 16+) and iPad (iPadOS 16+). Also runs on Mac with Apple silicon and Apple Vision Pro
Price: Free to download. Optional Premium: $2.99 a week or $29.99 a year in the US
Sources: YouTube videos, Shorts and live streams, web articles, PDFs
Summary styles: TL;DR, Standard, Detailed, Study Guide, Chapters
Study tools: Ask AI chat, key moments, mind maps, quizzes, flashcards, transcripts
Languages: Summaries in more than 60 languages. App in English, French, German, Italian, Japanese, Portuguese, Spanish, Turkish
Requirements: Videos need captions or auto-generated subtitles. PDFs need selectable text.
Latest version: 2.0, released October 2026
Where to get it: The App Store

Facts checked against the App Store listing on November 12, 2026.

Any source

Paste a link. Or a PDF.

Videos, Shorts, articles and documents, summarized in seconds. No watching, no skimming, no copy and paste.

YouTube videos, Shorts and live streams with captions
Web articles from any link
PDFs with selectable text
Or tap Share in YouTube or Safari and pick SumAI

YouTube summarizer PDF summarizer Web page summarizer

Five styles

Read it your way.

One paragraph when you are in a hurry, a full study guide when you are not. Pick the depth before you read. Try the tabs.

Compare the five summary styles

TL;DR Standard Detailed Study Guide Chapters

How to learn anything faster Example · 1h 12m video

One paragraph. Just the point.

Learning sticks when you spread it out, test yourself and sleep on it. Short, spaced sessions beat one long cram, and explaining an idea in plain words shows you exactly what you still don't understand.

The key ideas, in a few minutes.

Key points

Short, spaced sessions beat one long cram.
Explaining an idea in your own words shows the gaps.
Testing yourself works better than re-reading.
Sleep is when the learning actually settles.

The full picture, with the supporting detail.

Why we forget

New material fades quickly unless it is revisited. Each review slows the fade, so the next one can wait longer.

What to do instead of cramming

Spread reviews across days, explain each idea aloud in simple terms, and quiz yourself before checking your notes. Protect your sleep: that is when memories are consolidated.

Concepts, definitions and takeaways.

Forgetting curve: How memory of new material fades over time without review.
Spaced repetition: Reviewing at gradually increasing intervals.
Feynman technique: Explaining a topic in plain words to find what you don't yet understand.
Active recall: Retrieving an answer from memory instead of re-reading it.

Section by section, for long videos.

0:00 The forgetting curve
7:24 Why cramming fades
18:40 The Feynman technique
34:15 Spaced repetition in practice
52:30 Sleep and memory

Key moments

Tap a moment. Jump right in.

Chapters and key moments, synced to the video. See how a long video is laid out, then go straight to the part you came for.

Chapters with timestamps for every summary of a video
Tap a time to jump to that part of the video
Full transcript with timestamps, ready to copy

Key moments and chapters YouTube transcripts

Ask AI

Ask the video anything.

Chat with any video or document. Answers come from the source itself, with timestamps you can tap to check them.

Ask follow-up questions in plain language
Every answer about a video points to the moment it comes from
Works with PDFs and web articles too

How Ask AI works

Mind map

The whole topic. At a glance.

Every summary becomes a mind map you can zoom, tap and share. See how the ideas connect before you read a word.

AI mind maps from videos and PDFs

Study

Then make it stick.

A quiz and flashcards come with every summary, so reading turns into remembering. Go on, flip the card.

Flashcards generated from the summary
Multiple-choice quiz with your score
Works for lectures, tutorials, articles and papers

Flashcards and quizzes

Question What is the forgetting curve? Tap to flip Answer A model of how quickly new information fades when you don't review it. Tap to flip back

What makes the Feynman technique work? A Re-reading your notes B Explaining it in plain words C Studying late at night D Highlighting key terms

60+ languages

Any language in. Yours out.

Summaries in more than 60 languages, whatever language the source is in. Prefer to listen? Have it read aloud at your own speed.

Read a summary in your language, whatever the video is in
Listen at 0.75x, 1x, 1.25x, 1.5x or 2x
App available in English, French, German, Italian, Japanese, Portuguese, Spanish and Turkish

Summarize in any language Listen to summaries

English How to learn anything faster
Español Cómo aprender cualquier cosa más rápido
日本語何でも速く学ぶ方法
Deutsch Wie du alles schneller lernst
Türkçe Her şeyi daha hızlı öğrenmenin yolu
Français Comment tout apprendre plus vite
한국어 무엇이든 더 빨리 배우는 법
Português Como aprender qualquer coisa mais rápido
Italiano Come imparare qualsiasi cosa più in fretta
中文如何更快地学会任何东西
हिन्दी कुछ भी तेज़ी से कैसे सीखें
Nederlands Hoe je alles sneller leert

Library

All you learn. In one place.

Search, favorites and tags keep every summary easy to find. Export to PDF or Markdown when you want it somewhere else.

Search your whole library
Favorites and tags
Export as PDF or Markdown, or share and copy
Optional Sign in with Apple keeps your library across devices

Library and export

How it works

Three steps. About a minute.

From a link to the key points, without watching or reading the whole thing first.

Copy a link or pick a PDF

Copy a YouTube or web link, or choose a PDF from your files. You can also tap Share in YouTube or Safari and pick SumAI.
Choose a style and a language

Paste it into SumAI, then pick one of five summary styles and the language you want to read in.
Read, ask, then test yourself

Read the summary, ask questions about it, then check what stuck with a quiz or flashcards.

On your iPhone

See it for yourself.

Screenshots of SumAI 2.0, as it appears in the App Store.

Who it's for

Made for people who learn a lot.

Students, professionals and curious people use the same three steps for very different things.

Compare

How SumAI compares.

Honest, dated comparisons with the tools people most often consider alongside SumAI, including when the other one is the better pick.

FAQ

Questions, answered.

More in the full FAQ, or email net29apps@gmail.com.

What is SumAI?

SumAI is an AI summarizer app for iPhone and iPad. It turns YouTube videos, web articles and PDFs into structured summaries in seconds, then lets you go deeper with Ask AI chat, key moments, mind maps, quizzes, flashcards and full transcripts. Its full App Store name is "SumAI: YouTube & PDF Summary".

Which devices does SumAI work on?

SumAI runs on iPhone with iOS 16.0 or later and on iPad with iPadOS 16.0 or later. The App Store also offers it on Mac computers with Apple silicon (macOS 13.0 or later) and on Apple Vision Pro (visionOS 1.0 or later), where it runs as the iPad app.

Is SumAI free?

SumAI is free to download from the App Store. It also offers an optional Premium subscription as an in-app purchase, billed weekly or yearly. In the US App Store, Weekly Premium costs $2.99 and Yearly Premium costs $29.99 (checked in November 2026). Prices differ by country, and the App Store always shows your local price before you buy.

Can SumAI summarize any YouTube video?

SumAI can summarize YouTube videos, Shorts and live streams that have captions or auto-generated subtitles, because it works from the video’s transcript. A video with no captions at all, such as a music-only clip, cannot be summarized.

Can SumAI summarize PDFs?

Yes. Pick a PDF in SumAI and it summarizes the document in the style and language you choose. The PDF needs selectable text: a scan that is only an image of a page, with no text layer, cannot be read.

Can I ask questions about a video or document?

Yes. With Ask AI you chat with any video or document you have summarized. Answers come from the source itself, and for videos they include timestamps you can tap to jump to the moment the answer comes from.

Does SumAI make flashcards and quizzes?

Yes. SumAI generates a quiz and a set of flashcards from every summary, so you can test yourself on a video, article or PDF right after reading it.

What languages does SumAI support?

SumAI writes summaries in more than 60 languages, whatever language the source is in. The app interface itself is available in English, French, German, Italian, Japanese, Portuguese, Spanish and Turkish.

Do I need an account to use SumAI?

No. Signing in is optional. If you choose to use Sign in with Apple, SumAI keeps your library safe across your devices.

Guides

Learn faster, on purpose.

All guides

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