Revise less. Remember it for longer.
Drop in a PDF, a recorded lecture, or just a topic. DeepRevision turns it into practice, then uses FSRS — the research-backed scheduler Anki adopted — to bring each question back at the moment you're about to forget it.
- Free to start
- No card required
- Every question type is scheduled, not just flashcards
Works from
- PDFs
- Word & text files
- Slide decks
- Photos of notes
- Scanned pages
- Recorded lectures
- YouTube links
- Just a topic
How it works
Three steps, then it runs itself
You do the first step. After that the app decides what you should be looking at, and when.
Add whatever you're studying from
Upload a textbook chapter, a lecture slide deck, a photo of your handwritten notes, or record the lecture as it happens. Scanned pages get read too — text layer or not.
Get a plan, not a pile of cards
The material is outlined into ordered parts that follow the source. Each part carries its own questions, explanations and diagrams pulled from the exact pages it covers, so you always know where you are in the syllabus.
Revise on the schedule, not on a hunch
Rate each answer Again, Hard, Good or Easy. FSRS updates how well that question is holding and books its next appearance — sooner for the shaky ones, weeks out for the ones you've locked in.
Study plans
A whole book, broken into parts you can finish
Uploading a 400-page textbook usually gets you a pile of cards and no idea where to start. This reads the document, outlines it into ordered parts, and scopes every part to its own pages.
Every part arrives with its own toolkit
- Practice tools
- Flashcards, multiple choice, true/false and fill in the blanks — generated from the whole part, or from the exact pages you pick.
- Explanation tools
- A two-host podcast, a mind map of the part, or the same chapter explained as if you were ten — for when reading it again isn't working.
- Image tools
- Figures are pulled straight out of the part's page range, then turned into labelled diagrams you can be quizzed on.
- Ways in
- 5Ways in
- Parts
- 17Parts
- Tools per part
- 9Tools per part
- Tool groups
- 3Tool groups
One document in. Every part scoped to its own pages, and nothing generated from material you didn't ask it to read.
What's inside
Seven things it does that a folder of notes can't
Every screen below is the real app, captured as it ships.
One PDF in, a whole term's plan out
A 400-page anatomy guide becomes an ordered set of parts you can actually work through — each one scoped to its own pages, with its own mastery score.
- Parts follow the source document's structure, in order
- Per-part mastery so you can see exactly where you stalled
- Diagrams lifted straight from the pages that part covers
How the scheduling works
Built on FSRS, not on a fixed 1-3-7 day rule
Every question carries three numbers: how hard you find it, how firmly it's stuck, and how likely you are to recall it right now. FSRS-4.5 recalculates all three from each answer and books the next review for the point where your recall is predicted to drop to about 90%.
- Per question, not per deck
- The thing you keep missing on page 40 comes back tomorrow while the rest of the chapter waits three weeks. Nothing is averaged away by the deck around it.
- Every format, not just flashcards
- Multiple choice, true/false, fill in the blanks and image labels each carry their own schedule. Most spaced-repetition tools only do cards.
- Fewer reviews for the same recall
- Because the timing is predicted rather than fixed, you spend your sessions on the handful of things that are actually fading.
You give it one signal
- AgainMissed it — back within the session
- HardScraped it — a shorter gap than last time
- GoodKnew it — the gap grows
- EasyInstant — jumps well ahead
That's the whole interaction. Everything else — difficulty, stability, the next due date — is derived for you.
Memory Room
One screen for what your memory is doing
Question-level scheduling is precise but invisible. The Memory Room is the view on top of it: every topic you've studied, ranked by how well it's actually holding.
- A retention bar, not a due date
- Each topic shows how much of it you'd still recall right now, rolled up from the FSRS state of every question inside it. Watching that bar drop is a far better prompt than a calendar reminder.
- Slipping away, or holding steady
- Topics are sorted by how fast they're fading, so revision time goes to the four that are going rather than the twenty that are fine.
- Straight from the gap into a session
- Tap a fading topic and you're practising it — no hunting through folders for the right set first.
How questions are filed
Every question knows where it belongs
Generating questions is the easy part. The reason a mistake can be traced to a topic, a topic can be scheduled, and two uploads can be revised together is that every question is written with its own address.
- A path, not a folder
- Every question is filed subject → topic → subtopic as it is written. Not a label bolted on afterwards — the model returns the path with the question.
- Two to four concept tags
- The path says where a question lives. Concept tags say what it actually tests — the scaphoid, the median nerve — so questions in the same subtopic still group by the idea behind them.
- Scored at every level
- A question is linked to every tag above it, so accuracy adds up at whatever level you look: one concept, one subtopic, or the whole subject.
The same filing runs whether the question came from a textbook chapter, a lecture you recorded, or a topic you typed in. That is what lets the review queue, the Memory Room and mistake analysis all read from one picture of what you know.
- SubjectBiology
- TopicAnatomy
- SubtopicHand Anatomy
Which carpal bone is most commonly fractured?
Which nerve is compressed in carpal tunnel syndrome?
Mistake analysis
Every wrong answer gets written up
Most apps mark it red and move on. This one keeps the question, works out why you missed it, and doesn't let it go until you can answer it cold.
It reads more than the answer you picked
- How long you took
- 12 seconds on a question that needs about 15 isn't a rushed guess. Timing is what tells a careless slip apart from a gap you don't know you have.
- How many times you've missed it
- A first miss is noise. A fourth attempt on the same idea is a pattern, and it gets written up as one.
- Which topic it sits under
- Every mistake is filed by subject, topic and subtopic, so accuracy is reported where you can act on it instead of as one number.
- Mistakes
- 45Mistakes
- Subjects
- 3Subjects
- Topics
- 8Topics
- Avg accuracy
- 60%Avg accuracy
One screen for everything you've missed, ranked by how often you miss it — with a Practice button on every subject.
Works offline
Your whole library, with no connection, fully available in Offline
Not a couple of cached pages. Everything you have made is written to your device as you make it — so the Underground, a long flight, or a week on bad hall wifi costs you nothing.
- Downloaded without being asked
- Your library lands on the device when you sign in, and tops itself up every time you open the app. There is no ‘make available offline’ switch to remember before a flight.
- Reviews still count
- The scheduler runs on the device, so answers you give with no signal are graded and rescheduled there and then. They queue up and sync the moment you reconnect.
- Kept, not cached
- Podcast audio, lecture recordings and the diagrams from your pages are written to permanent storage — not the temporary cache your phone empties when space runs short.
Available offline
- Multiple choice, true/false, fill in the blanks, flashcards and matching
- Image labelling diagrams
- Study plans, the source PDF, and the text read from every page
- Figures extracted from your pages
- Mind maps and plain-language explanations
- Podcasts — the audio file itself, not a stream
- Lecture recordings, transcripts and the notes made from them
- Worked solutions
- Your review schedule, streak and performance history
- Folders, playlists, and sets you've saved from other people
Needs a connection
- Generating anything new — that runs on our servers
- Knowledge Clash, which is live against other people
- Browsing sets you haven't saved yet
Study formats
One set of material, eight ways to be tested on it
Switching format is the cheapest way to find out whether you know something or only recognise it. And each of these carries its own spaced-repetition schedule — the review queue isn't a flashcard-only feature.
Multiple choice
With distractor analysis
Flashcards
Spaced repetition built in
True / false
Fast concept checks
Fill in the blanks
Recall, not recognition
Matching
Pair terms with meanings
Image labelling
Diagrams and scans
Step-by-step solving
Maths and science working
Lecture capture
Record, transcribe, quiz
Image labelling
For everything you have to learn by sight
Anatomy, histology, circuits, maps, MRI slices. Multiple choice can't test whether you can find the thalamus — this can.
- Identify
- Every structure gets a numbered pin and a name, pulled from the diagram or added by you. Label a scan once and it becomes a question set.
- Review
- Hide the labels and the same image turns into recall practice. You're naming the parts, not reading them.
- Tap to locate
- The exam asks the other way round: given the name, tap the spot. There are no options to guess between, and a near-miss is still a miss.
Drop a pin on every structure
And also
The parts that fill in the gaps
Record the lecture, keep the questions
Capture a class as it happens. The recording is transcribed and turned into practice material you can revise from that evening.
Borrow what other people made
Explore shared question sets by subject, topic and exam. Take one as it is, or fold it into a plan of your own.
Revise against someone else
Knowledge Clash puts your sets into live head-to-head rounds — challenge a friend, or take on a group.
Your material
Three things worth knowing before you upload anything
Written plainly, because the point of a privacy section is that you can actually read it.
Private by default
Every set you create starts private — that's the stored default, not a setting you have to find. Publishing something to Explore is a deliberate action you take, one set at a time.
Your material is used to run your features
Uploads and recordings are stored against your account so your library follows you between devices, and shared only with the service providers needed to process them. What we do and don't keep is written out in full in the privacy policy.
Leaving takes one screen
Delete your account from inside the app or from the web. Your content goes with it and personal data is removed within 30 days — no email thread, no retention call.
Questions
The things people ask first
If something here isn't answered, mail us — a person reads it.
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?
There are ready-made banks for GRE, GMAT, AP and other standardised tests, plus subject sets shared by other learners in Explore. Beyond that, anything you can upload becomes practice material — you're not limited to a fixed curriculum.
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, review on the go and live multiplayer all live there. The web app covers your library, study plans and practice, so you can sign in from a laptop and carry on.
Start with the chapter you're least confident about.
Upload it, let DeepRevision build the practice, and let the scheduler decide when you see it again. Free to start, no card required.