AI study app for students : Study the lecture. Not the clock.

SumAI helps students turn lecture videos, tutorials and course readings into study guides, then test themselves on the material. Paste a YouTube lecture or pick a PDF, choose the Study Guide style, and finish with a quiz and flashcards instead of a second viewing.

Download SumAI on the App Store

Free to download for iPhone and iPad

What makes the Feynman technique work?

How SumAI helps

  • A study guide from any lecture

    The Study Guide style organizes a video or reading into concepts, definitions and takeaways.

  • Self-testing built in

    Every summary comes with a multiple-choice quiz and flashcards. Testing yourself is one of the two study techniques rated most useful by researchers.

  • Ask about the confusing part

    Use Ask AI to get a concept explained more simply, with a timestamp so you can hear the lecturer say it.

  • See the whole topic

    A mind map shows how the ideas in a lecture connect, which helps when you plan revision.

  • Readings as well as videos

    Papers and chapters in PDF form get the same treatment, as long as the PDF has selectable text.

  • Study in your language

    Summaries can be written in more than 60 languages, whatever language the lecture is in.

The problem with lecture videos

Recorded lectures are generous with time. An hour of video might contain twenty minutes of new ideas, and you cannot tell which twenty until you have watched all sixty. Then exam season arrives and you watch them again at double speed, which helps less than it feels like it does.

SumAI changes the order of operations. You see the structure first, spend your attention where it counts, and finish by testing yourself.

What the evidence says about studying

A large 2013 review of learning techniques by Dunlosky and colleagues rated only two of ten common methods as high utility: practice testing and distributed practice, which means spreading study sessions over time. Rereading and highlighting, the two most popular habits, were rated low.

That is why SumAI does not stop at the summary. Reading a summary helps you understand. The quiz and flashcards that come with it are what help you remember.

How students use each tool

Before a lecture or reading. Make a Study Guide summary and skim it. You now know the terms and the argument, so the real thing is easier to follow.

During revision. Open the mind map for the big picture, then take the quiz. Use your wrong answers as your revision list.

When something does not make sense. Ask Ask AI to explain it more simply, then tap the timestamp to hear the lecturer’s own explanation.

For reading lists. Summarize PDFs of papers and chapters to decide what needs a careful read. Keep everything tagged by course in your library.

In a second language. If you study in a language that is not your first, read the summary in your own language to check your understanding, then go back to the original.

What SumAI is not

It is not a shortcut around the work. A summary tells you what a lecture covers; it does not sit the exam for you. It is also not a recorder: it works with YouTube videos, web articles and PDFs, not with live classes or uploaded recordings.

Used honestly, it saves the time you would have spent rewatching, and moves it to the kind of studying that sticks.

Last updated November 12, 2026.

A routine that works

A study routine with SumAI

  1. Preview before you watch

    Summarize the lecture with the Study Guide style and read it first. Knowing the structure makes the lecture easier to follow.

  2. Watch the parts that need it

    Use the key moments to jump to the sections that are hard or central, and watch those properly.

  3. Close it and take the quiz

    Test yourself straight away. Wrong answers show you what to revisit.

  4. Come back with flashcards

    Go through the flashcards a day or two later, and again before the exam. Answer in your head before you flip each card.

FAQ

Questions from students

Is SumAI good for studying?

SumAI is built with studying in mind. It has a Study Guide summary style that organizes material into concepts, definitions and takeaways, and it generates a quiz and flashcards from every summary so you can test yourself on a lecture or reading.

Can SumAI summarize lecture videos?

Yes, if the lecture is on YouTube and has captions or auto-generated subtitles. SumAI summarizes it, lists its key moments with timestamps, and lets you ask questions about it.

Can SumAI record my lectures or summarize a recording file?

No. SumAI summarizes YouTube videos, web articles and PDFs. It is not a lecture recorder and does not import audio or video files.

Is using an AI summarizer cheating?

Using a summary to understand and revise material is study support, in the same way as reading a study guide. Submitting AI-generated text as your own work is different and may break your institution's rules. Check your course's policy on AI tools.

Does SumAI replace watching the lecture?

It is better used alongside it. Read the summary to see the structure, watch the sections that matter, then use the quiz and flashcards to check what you remember. Any AI summary can miss a detail, so rely on your course materials for anything that will be examined.

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.