NewMistake analysis now on the web

Stop studying everything.
Study what you're getting wrong.

DeepRevision turns your notes, slides and lectures into questions, finds the ones you keep missing and why, and brings each one back right before you'd forget it.

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Free to start · No card required · Web & Android

The revision loop

The revision loop: your notes become questions in every format, practised in five modes. Got it right? Spacing grows. Missed it? See why — the wrong way and the right way of thinking — ask Sage or listen to the podcast, then practice again; it comes back sooner. Every question comes back when it's due, and Memory Room shows what's fading. Right every time? Teach it back: pass and it's Mastered, gaps found and you go back to see why.

Reading your page…

Multiple choiceFill in the gaps

Page 61
Source page 61

Real pages and real questions from the app — every question points back to the line it came from.

8

kinds of material

PDFs, slides, Word files, photos, scans, lectures, YouTube links or just a topic.

6

ways to practise

Multiple choice, true or false, fill in the blanks, matching, flashcards and image labelling.

FSRS

review scheduling

The open spaced-repetition algorithm Anki adopted, on every question you answer.

Mistake analysis

Every wrong answer, sorted, labelled and explained

Mistakes are filed by subject, topic and subtopic, the way your syllabus is, with your accuracy at every level. Each one is labelled with how it went wrong — a concept mix-up, a careless slip, time pressure — from your attempts and timing. Open one and the AI tells you why you missed it, and YouTube tutorials can be pulled in for that exact question.

  • Subject → topic → subtopic, with accuracy for each
  • 7 error types: conceptual, careless, time pressure and more
  • AI diagnosis, the right way to think about it and a memory hook
  • YouTube tutorials picked for the question you got wrong

0

Mistakes

0

Subjects

0

Topics

0%

Avg acc

Medical Science

5 items to master

Practice58% Acc

Biology

4 items to master

Practice71% Acc

Physics

3 items to master

Practice76% Acc

Why you make mistakes

Every mistake labelled from your attempts and timing

  • Conceptual Confusion–

    The same wrong answer, again and again

  • Careless Mistake–

    A fast slip on one you've got right before

  • Time Pressure–

    Rushed before you'd shown you know it

  • Misreading Question–

    Too quick for its length, or a missed NOT

  • Formula Error–

    The concept mix-up is in a formula

  • Guessing–

    A different wrong answer each time

  • Overthinking–

    Far longer than the question needs

Question 4 / 12

What factors influence blood pressure?

Physiology•Cardiovascular•Blood Pressure
medium

Question 3 / 12

What happens when blood pressure drops?

Tap to flipSwipe to change card

Answer

The body increases sympathetic activity to the SA node and blood vessels, raising heart rate and blood pressure.

Tap to flip backSwipe to change card

Spaced review

Each question comes back right before you'd forget it

Say how well you knew it and the next review is booked: tomorrow for the shaky ones, weeks away for what's locked in.

  • Per question, not per deck
  • Every format, not just flashcards
  • Today's queue only holds what's fading

Teach it back · the Feynman technique

If you can't explain it simply, you don't know it yet

Pick a Sage answer, a study-plan section or a moment from a lecture, and explain it in your own words — typed or out loud. Your explanation is checked idea by idea against your own pages, and a curious beginner asks about whatever you left out. Revise until every idea is there.

  • Checked against your own source, every hint linked to its page
  • A beginner asks “why?” about the gaps — and never gives the answer
  • Cover every idea and a harder audience asks “what would happen if…”
  • Turn the ideas you missed into practice questions in one tap

Teach it back

Explain what the nucleus does as if to a friend who's never heard of it.

Round 1

Explain it in your own words…

Say it Check

Key ideas from your pages

0 / 4

  • Hidden, so it isn't a crib sheet

  • Hidden, so it isn't a crib sheet

  • Hidden, so it isn't a crib sheet

  • Hidden, so it isn't a crib sheet

[1] Page 67

[2] Page 68

Mind maps

See the whole chapter on one page

Any section of your study plan, or any lecture, becomes a map of its ideas: the topic in the middle, its branches around it, the key points on each. Tap an idea and it's explained from the pages it came from. Answer a practice question and the map shows exactly where that question sits.

  • Made from a study-plan section or a lecture
  • Tap any idea to have it explained, with the page cited
  • Practice questions point to their place on the map
  • Rename, add or move ideas to make it your own
The cardiovascular system
The HeartChambersValvesCirculationConductionPressureTwo atriareceiveRight ventricleto lungsLeft ventriclepumps blood tothe aortaSeptum dividessidesTricuspid andmitralPulmonary andaorticStop backflowPulmonarycircuitSystemic circuitCoronaryarteriesSA node sets thepaceAV node delaysPurkinje fibresSystolic vsdiastolicSympatheticnerves raise it

Study plan section

The cardiovascular system

Pages 205–231

5

branches

15

key points

Every branch and point comes from the section's own pages, so the map covers what you were set, not a generic syllabus.

Study plan and exam date

Set your exam date. See every day whether you're on track.

Upload the whole textbook and it's split into ordered sections, each with its own pages, questions and mastery. Add your exam date and the plan counts down, works out how many minutes a day you need, and points at the next section. The night before, Cram puts your shakiest sections first.

  • Days left, sections mastered and the next section to study
  • Minutes a day you need, next to the minutes you planned
  • Cram: shaky sections first, 25-minute blocks, one final mock
  • A page map shows which pages you've never been quizzed on

Study plan

Exam mode

Anatomy midterm

5

days left

3 of 14 sections masteredOn track

You need

33 min/day

You planned

45 min/day

  • Cells and tissuesp. 1–34
  • The integumentary systemp. 35–58
  • The skeletal systemp. 59–96
  • The muscular systemp. 97–140
  • The nervous systemp. 141–212
  • The sensesp. 213–246
  • + 8 more sections

Next section: The muscular system

Cram session

How long have you got? Shaky sections come first.

30m1h2h4h
    25-minute blocks, a short skim first115 min

    Image labelling

    Press trace. Every part finds its own outline.

    Pin the parts of any diagram and auto-trace outlines each one from the picture itself. Then hide the names and find every part again.

    • Anatomy, histology, circuits, maps, scans
    • Identify, review and exam modes
    • Marked on the image, not from a list
    Image LabelingBiology · Cardiovascular System

    Blood Flow in the Human Heart

    LockedUnlock to edit
    Blood Flow in the Human Heart

    Study Mode

    IdentifyReview
    Exam
    Labels · 7Click lock to edit
    1Aorta
    2Pulmonary Artery
    3Superior Vena Cava
    4Right Atrium
    5Left Atrium
    6Right Ventricle
    7Left Ventricle

    Recording

    24:12

    Lecture capture

    Record the lecture. Walk out with the questions.

    Mark the moments that matter and snap the board as you go. The transcript stays synced to the audio and turns into practice that evening.

    • Live transcript
    • Marks and board photos on the timeline
    • Questions written from what was said
    9:41
    Some Basic Chemistry

    [NOVA]: Welcome back to another episode of "Learning Together!" I'm Nova, your ever-curious host, and today we're diving into a topic that's all around us, yet often misunderstood: chemistry!

    [ALLOY]: That's right, Nova! Chemistry is the foundation of everything in our physical world. It’s not just something that happens in a lab with beakers and Bunsen burners. Chemistry surrounds us in our daily lives, from the air we breathe to the food we eat and even the pages of the book you’re holding.

    [NOVA]: So, what exactly is chemistry, Alloy?

    [ALLOY]: Great question! Chemistry is the study of matter, and all matter is made up of elements. An element is a substance consisting of only one type of atom. Think of atoms as the building blocks of everything. For example, we have hydrogen (H), carbon (C), and oxygen (O).

    [NOVA]: How many elements are there, and why are they important?

    [ALLOY]: There are 92 naturally occurring elements. In the human body, seven elements—hydrogen, carbon, nitrogen, oxygen, phosphorus, sulfur, and calcium—make up about 99% of our body weight. It’s fascinating to see how these elements come together to form compounds like water (H₂O) and glucose (C₆H₁₂O₆).

    [NOVA]: That makes sense! So, atoms are a key part of these elements, right?

    [ALLOY]: Exactly! Atoms consist of protons, neutrons, and electrons. Protons have a positive charge, neutrons are neutral, and electrons have a negative charge. The number of protons in an atom determines its atomic number.

    [NOVA]: And how do atoms bond to form molecules?

    [ALLOY]: The key to bonding lies in the electrons. Atoms bond together through chemical bonds, which are forces of attraction between positively and negatively charged particles.

    [NOVA]: Could you tell us about the different types of chemical bonds?

    [ALLOY]: Absolutely! There are four main types: ionic bonds, covalent bonds, disulfide bonds, and hydrogen bonds. Ionic bonds occur when one atom loses an electron and another atom gains it. For instance, sodium (Na) can form an ionic bond with chlorine (Cl) to create table salt (NaCl).

    [NOVA]: That’s really interesting! Why do some atoms bond in those ways?

    [ALLOY]: Each atom seeks stability, which often means filling its outermost electron shell. Atoms that have full outer shells are typically stable and less likely to react with others. This tendency to gain, lose, or share electrons helps each atom achieve stability.

    [NOVA]: Wow, chemistry really is all around us, and it plays such a crucial role in our lives!

    [ALLOY]: It truly does. Understanding basic chemistry can enhance our appreciation of how living organisms function and interact with the environment.

    [NOVA]: Thanks, Alloy! I feel like I have a much better grasp on the basics of chemistry now.

    [ALLOY]: You're welcome, Nova! Remember, chemistry isn’t just a subject—it's an essential part of life. Keep exploring, and until next time, stay curious!

    [NOVA]: See you next time on "Learning Together!"

    Silent preview · press play to listen
    0:002:51

    Podcasts

    Turn any topic into a two-voice podcast

    Nova, the curious student, asks. Alloy, the tutor, explains. Make one from a topic, a chapter of your study plan or your own mistakes, and read along as the transcript follows the audio.

    • A student who asks and a tutor who explains
    • The transcript highlights each sentence as it's spoken
    • Download it and listen offline on the way in

    Sage, your AI tutor

    Answers from your own pages, figures included

    Ask anything about what you're studying. Sage answers from your material, pulls the right figure straight out of the PDF, and numbers every claim so you can open the page it came from.

    • Figures taken straight from your PDF
    • Every claim linked to its page
    • Or answer from the web or YouTube instead

    Sage

    Your AI tutor

    Your materialWebYouTube

    Ask anything about your material…

    Your material

    p. 67p. 68

    68

    Your study plan's source PDF

    Solve and explain

    Snap a problem. Get every step — and any step explained like you're 10.

    Photograph a question from your book or the board. It comes back worked step by step, and any line you don't follow can be explained again in plain words — in English or your own language.

    • Step-by-step working, each step named
    • Explain any step like you're 10
    • Then test yourself with Concept Check and Spot the Error

    Your photo

    A photographed geometry problem: find angle x in triangle ABC

    Reading…

    ∠ABC=60∘\angle ABC = 60^\circ∠ACB=30∘\angle ACB = 30^\circ∠BAD=40∘\angle BAD = 40^\circ∠AED=70∘\angle AED = 70^\circx=∠ADEx = \angle ADE

    Step-by-step solution

    Triangle Angle Chasing Problem

    Approach. Find the angles of the big triangle ABC first, then use the angle sum of triangle ADE to find x.

    Step 1

    Find angle BAC in the big triangle

    Triangle angle sum theorem

    ∠BAC+60∘+30∘=180∘\angle BAC + 60^\circ + 30^\circ = 180^\circ

    ∠BAC=90∘\angle BAC = 90^\circ

    Step 2

    Find angle DAE

    Angle subtraction

    ∠DAC=90∘−40∘=50∘\angle DAC = 90^\circ - 40^\circ = 50^\circ

    ∠DAE=50∘\angle DAE = 50^\circ

    Step 3

    Find x in triangle ADE

    Triangle angle sum theorem

    x+50∘+70∘=180∘x + 50^\circ + 70^\circ = 180^\circ

    x=60∘x = 60^\circ

    Works offline

    No signal? Keep studying.

    Download your library once and the Android app runs on its own. Your questions, flashcards, PDFs, lectures and podcasts live on your phone, and everything you answer is saved there and syncs by itself when you're back online.

    • Practice, review and exams with no connection
    • Your PDFs, lecture audio and podcasts on the phone
    • Answers sync on their own when you reconnect

    Making new questions, asking Sage and transcribing lectures need a connection. Offline study is in the Android app.

    1
    2
    3
    4

    Download once

    Questions, PDFs, lectures and podcasts saved to the phone.

    9:41

    Download manager

    Saving your library to this phone…

    Questions

    Everything you have generated to practise with

    Downloading

    Study plans

    Your plans, their sections and source files

    Downloading

    Image labelling

    Labelled diagrams and their pictures

    Downloading

    Lectures & podcasts

    Recordings, transcripts, notes, audio and recaps

    Downloading

    Everything you get

    One library of your own material, and everything you can do with it, from the first upload to exam day.

    Bring your material

    Questions are written from what you upload, not a fixed bank.

    Whatever you're studying

    Bring a textbook, slides or past papers. The questions are written from your material, not a fixed syllabus.

    • Physics
    • Chemistry
    • Biology
    • Earth Science
    • Environmental Science
    • Agriculture

    Made for learning, not shortcuts

    Checkable, not made up

    Every generated question links to the page and line it came from, so you can check it against the source.

    Built to make you think

    Practice explains as you go, exam mode gives nothing away, and worked solutions come with Spot the Error checks.

    Private by default

    Everything you make starts private. Delete your account from the app or the web and your content goes with it.

    Study on every screen

    Start in the browser today — your library and review queue follow you into the app.

    WebOpen in your browser →AndroidGoogle Play →
    iPhone & iPadComing soon
    WindowsComing soon
    macOSComing soon

    Questions people ask first

    What can I upload?

    PDFs, Word documents, plain text, slide decks, spreadsheets, and photos or scans of pages. Scanned PDFs with no text layer are read as images, so photocopied handouts work too. You can also record a lecture in the app, paste a YouTube link, or skip files entirely and just name a topic.

    What is FSRS, and why does the scheduling use it?

    FSRS is an open, research-backed spaced-repetition scheduler — the same family of algorithm Anki adopted as its modern scheduler. Instead of fixed 1-3-7 day intervals, it models three things per question: how difficult you find it, how firmly it's stuck, and how likely you are to recall it right now. Reviews are booked for the point where your predicted recall falls to about 90%, which is early enough to save the memory and late enough not to waste the repetition. In practice that means far fewer reviews for the same retention.

    Does spaced repetition only apply to flashcards?

    No, and that's the main difference from most study apps. Multiple choice, true/false, fill in the blanks and image labels each carry their own schedule, so your daily review queue is a mix of formats drawn from everything you've studied — not a separate card deck you have to maintain by hand.

    How is this different from an AI chatbot?

    A chatbot answers the question in front of it and forgets you. DeepRevision keeps a model of what you know: it stores every question you've missed, groups those mistakes by subject and topic, tracks which topics are slipping, and puts them back in front of you on a schedule. Generating the material is the easy part — the follow-through is the product.

    Is it free?

    There's a free tier you can use without a card. It covers a daily allowance of AI work — study plans, question generation, solutions and transcription. A paid plan raises those limits. Anything you've already created stays yours either way.

    Can I trust the questions it generates?

    Treat generated material as a strong first draft, not a textbook. Questions are built from the pages you supplied and each one is tied back to the part of the source it came from, so you can check it against the original. Every set is editable — fix a wrong option or reword a question and it stays fixed.

    Does it help me cheat?

    No — it's built for the opposite. Exam mode is timed and gives nothing away, mistakes are recorded rather than glossed over, and the solver's Spot the Error and Concept Check modes exist specifically to stop you copying a worked answer you haven't followed.

    Which exams does it cover?

    Any exam you have material for. The questions are written from what you upload — textbooks, lecture slides, past papers, your own notes — so you're not limited to a fixed syllabus. You can also browse sets other learners have shared in Explore.

    What happens to my documents?

    They're stored against your account so your library works on every device you sign in from, and processed by the services needed to read and generate from them. Everything you create is private by default. Delete your account and your content goes with it, with personal data removed within 30 days.

    Do I need the phone app?

    The mobile app is the full experience — lecture recording, image labelling and review on the go all live there. The web app covers your library, study plans and practice, so you can sign in from a laptop and carry on.

    Does it work offline?

    Yes, in the Android app. Download your library from the download manager and your questions, flashcards, study plans with their PDFs, labelled diagrams, lecture audio and podcasts stay on the phone. Practice, review and exams all run with no connection, and every answer is saved on the device and uploads by itself when you're back online. Making new questions, asking Sage and transcribing a lecture need the internet.

    Start with the chapter you're least sure of

    Upload it, answer a few questions, and let the schedule decide when you see them again. Free to start, no card needed.

    Get started — it's free