Regra

Read once,
grasp everything.

Upload your slides. Get your regra — the whole lecture taught to you from scratch, nothing skipped. In any language you want.

Open a real regra

NotesFlashcards & quizzesAsk AI34 languagesCancel anytime

This is a real regra — open it.

An hour-long university lecture, taught from scratch. One read — about 25 minutes — and the whole thing makes sense. No signup needed.

The sample regra, open at its Regra tab: the Respiratory System lecture taught step by step from scratch, a menu to read it in another language, a button to view the original slides, and tabs for Notes, Flashcards, Quiz, and Ask AI.
Open it

Generated from real slides — they're one click away inside.

From slides to your regra in minutes.

  1. 1

    Add your lecture

    Slides, documents, recordings, or a YouTube link.

  2. 2

    The AI teaches you from scratch

    Every slide, step by step, nothing skipped.

  3. 3

    Read, practice, ask

    Notes, flashcards, quizzes, and Ask AI — all from your own slides.

From first read to exam day.

The taught lecture is just the start. From the same upload you get Notes for fast review, flashcards and quizzes to test yourself, and Ask AI for whatever's still unclear — all built from your slides, nothing generic.

Your notes, already written.

The whole lecture, condensed to what you'd revise the night before.

Prokaryotes

Introduction to Prokaryotes

  • Two of three domains — Bacteria and Archaea — are prokaryotic
  • First inhabitants on Earth, appearing 3.5–3.8 billion years ago
  • Abundant and ubiquitous; found in moderate and extreme environments

Microbial Mats

  • Microbial mat — multi-layered sheet of prokaryotes (mostly bacteria, also archaea)
  • May be earliest forms of life (~3.5 billion years ago)

Stromatolites

  • Stromatolite — sedimentary structure formed when minerals precipitate out of water by prokaryotes in a microbial mat

Bring the lecture however you have it.

  • Slides & documents
  • Live recording
  • Audio or video file
  • YouTube link

Cards that ask you back.

A deck for the whole lecture, from your own slides.

Not studied

What are the two domains of prokaryotes, and approximately when did they first appear on Earth?

Revisit

What is a stromatolite, and how does it form?

Studied

What are the three basic shapes of prokaryotes?

Card 1 of 3

Ask it anything, mid-lecture.

Stuck on one line? Ask. Every answer comes from your lecture, not the internet.

What is the difference between a microbial mat and a stromatolite?

The short version: a microbial mat is the living community, and a stromatolite is the rock-like structure it leaves behind.Your lecture puts it clearly:
  1. Microbial mat — a multi-layered sheet of prokaryotes (mostly bacteria, some archaea). It's the actual living organisms.
  2. Stromatolite — a sedimentary structure that forms when minerals precipitate out of water by prokaryotes in a microbial mat.

Sit the exam before the exam.

Questions from your slides, scored the moment you finish.

In any language you want.

Upload in any language, learn in the one you choose. 34 of them.

EnglishالعربيةБългарскиবাংলাČeštinaDanskDeutschΕλληνικάEspañolفارسیFilipinoFrançaisעבריתहिन्दीMagyarBahasa IndonesiaItaliano日本語한국어Bahasa MelayuNederlandsPolskiPortuguêsRomânăРусскийSrpskiSvenskaไทยTürkçeУкраїнськаاردوTiếng Việt简体中文繁體中文

See a real regra, with its Notes, Flashcards, Quiz and Ask AI — open the sample.

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Free
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$0/mo
  • 2 lectures a month
  • 128 flashcards & quiz questions
  • 20 Ask AI chats
  • 100 MB storage
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Plus
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$8.25/moSave 51%
billed $99 yearly
  • 40 lectures a month
  • Unlimited flashcards
  • Unlimited quizzes
  • Unlimited Ask AI
  • Unlimited storage
  • Custom PDF header & footer
Pro
For five or six courses — even the math-heavy ones.
$12.42/moSave 48%
billed $149 yearly
  • Everything in Plus
  • 80 lectures a month
  • Priority generation (skips the queue)
  • Priority support
  • Early access to new features

Your slides stay privateCancel anytime14-day full refund on your first purchase

Frequently asked questions

What is a regra?

A regra is your lecture, taught to you from scratch — nothing skipped. Upload your slides; the AI explains the whole lecture step by step, connected to real life, with flashcards, quizzes, and an AI you can ask anything.

I already have the slides — why do I need this?

Because slides list facts without teaching them. Other AI tools summarize — they condense and skip. A regra teaches: every slide from scratch, tied to real life and to what you already know.

The result: you read once — time saved. You actually grasp it. And finally, studying feels like it's working.

What files can I upload?

Documents and recordings. Documents: PDF, PowerPoint or Word. Recordings: audio files like MP3 — or record the lecture right in the app. A YouTube link works too. One file per lecture.

How long does it take?

Just a few minutes. Upload your slides, and your regra is ready shortly after. You'll see it build as it goes.

Does it work for what I study?

Yes — any subject, any level. Sciences, engineering, medicine, law, business, humanities: if your lectures have slides, it works.

Which languages?

34 — English, Spanish, German, French, Portuguese, Turkish, Arabic, Hindi, Japanese, Chinese, and 24 more. And not just the menus: the teaching itself. Upload slides in one language, get taught in the one you think in.

Who can see my slides? Is AI trained on them?

Only you. Your uploads and every regra made from them are private to your account. We never use them to train AI, and the AI providers we work with aren't allowed to either.

Can the AI make mistakes?

Like any AI, it can — so a regra is built to make mistakes easy to catch and free to fix: your original slides always sit one click away for checking, your first 3 regenerations are free, and Ask AI will double-check any line you doubt.

What do I get free?

Every feature, free, on 2 full lectures — enough to see a real regra of your own before paying anything.

What if I subscribe and regret it?

Cancel anytime in the app. You can get a full refund within 14 days of your first purchase.

Stop rereading. Start grasping.

Understand your next lecture on the first read. Any subject, any slides, 34 languages.