01
Read it
Each chapter is written from the full text of your source. Read it, or switch on narration.
Your books, turned into problems you have to solve
Upload a textbook and get a course written from it. When you finish a chapter, Study Junkie sets you a problem and gives you feedback on the answer you write. It asks again a few days later, when the material has started to fade.
No card. No subscription. Credits never expire.
39 seconds · real product run
Watch it find the line thatbreaks the answer.
Jim Hefferon's Linear Algebra becomes a course, a problem, written work, specific feedback, and scheduled recall.
Read transcript
- Start with a book you keep bouncing off.
- It reads the whole book and builds your course.
- Not a summary of it. Chapters out of the source.
- Then it sets you a problem from the chapter you just read.
- And it reads what you actually wrote.
- It found the one clause that was wrong. And it says why.
- Then it brings it back at one, three, and seven days.
- 1,500 free credits. One-time packs. No subscription.
How it works
Read it. Practise it. Remember it.
The book stays at the centre. Study Junkie gives you a reason to think about it after the page is closed.
02
Practise it
Study Junkie sets problems from the chapter. Write the answer in your own words and get feedback on the reasoning. If one sentence stops you, ask about it.
03
Remember it
Questions come back after 1, 3 and 7 days. They are generated from the book you uploaded and the chapter you finished.
A real practice loop
The app sets the problem. You do the thinking.
Use the controls to move through a representative assignment. It follows the real assignment flow without spending credits or saving an answer.
Generated from Chapter 1 Unsolved
Identifying games with perfect information
Use the six criteria from the chapter to classify chess, Texas Hold'em, and Snakes and Ladders as finite games with perfect information. Name each condition a game violates and explain why.
Your answer Draft
Chess fits because both players see the full position, turns are deterministic, and the game ends. Poker does not fit because each player has hidden cards. Snakes and Ladders has a finite board, but the dice make the outcome non-deterministic.
Tutor feedback Needs revision
Problems are generated from the chapter you just read.
Try one from your book Built around the source
The book stays in the course
Study Junkie uses the full uploaded text when it writes each chapter. The assignments come from the chapter you just finished. When a sentence gets in the way, the tutor can retrieve the relevant part of the source and help you work through it.
01 / source Mathematical Games.pdf Uploaded text
02 / chapter Introduction to Mathematical Games Written from the source
03 / practice Problems tied to the chapter Ready to solve
Listen when reading is awkward
Generate narration for a chapter and change the playback speed.
Ask when a passage stops you
The tutor can answer inside the context of the uploaded source.
Study in your chosen language
Choose the language for generated chapters and assignments.
Scheduled recall
The chapter comes back after you close it
Study Junkie schedules questions for 1, 3 and 7 days later. The email opens the recall session for that chapter, so you can answer before rereading.
Done Finish chapter
Day 1 Recall
Day 3 Recall
Day 7 Recall
Mathematical Games
What makes a game one of perfect information?
You covered this about a day ago.
Explain the condition in your own words before you open the chapter again.
Answer it → Pricing
Study Credits
Start with 1,500 free Study Credits after email verification, then buy credits once and use them when you generate study material. Credits do not expire.
1,000 credits
$10
A book outline and one chapter with problems and recall. Narration uses 150 more credits.
2,500 credits
$25
A book outline and about three complete chapters, including narration.
5,000 credits
$50
A book outline and about seven complete chapters, including narration.
A narrated chapter with problems and recall costs 575 credits. A book outline costs 500 credits once.
Study Junkie reserves credits before generation and releases them automatically if the generation fails. Refund policy
FAQ
Common Questions
Study Junkie is for people who teach themselves from books. If you have a book you want to understand but no teacher to set problems or check your work, Study Junkie fills that gap.
No. Study Junkie does not shorten your book. Every chapter is written from the full text, and the problems come from the material in that chapter.
Study Junkie accepts PDF, DOCX, and text files. You can upload textbooks, nonfiction books, manuals, or other text-based material.
Study Junkie supports English, Russian, Spanish, French, German, Italian, Portuguese, and Polish. You can upload source material in any language, and then choose which language you want the lectures and assignments to be generated in. For example, you can upload a book in German and study it in English, or vice versa.
The AI uses your uploaded document as its primary knowledge source when answering questions and generating content. This means the discussions and assignments are directly relevant to what you're studying, not generic information from the internet.
Yes! Every chapter can be narrated by AI, so you can listen to your lectures instead of reading them. The audio player includes adjustable playback speed, making it perfect for studying whenever reading isn't convenient.
Study Junkie sets problems from the chapter you just read. You answer in your own words, and it responds to the reasoning you wrote. You can revise the answer and keep working through the problem.
Course generation typically takes a few minutes, depending on the length and complexity of your source material. For a 500-page book, you can expect your course structure to be ready within 2-3 minutes.
Study Credits are one-time purchases used for AI-powered generation. Prices are shown in the Billing area before you start: course outlines cost 500 credits, chapters 250, assignments 100, tutor replies 25, narration 150, and recall questions 75. Credits are reserved before work begins and released if generation fails. Credits do not expire. See our Refund Policy for refund eligibility.
Yes. Study Junkie works on phones and tablets as well as desktop browsers.
Start with the book that keeps beating you
Upload it. Get the first chapter and a problem to solve.
No card. No subscription. Credits never expire.