About this app
The only CAIE revision app with an AI Tutor, real-time Multiplayer, and 15,000+ past papers. Free. No paywalls. Built by students, for students. We know what exam pressure feels like, and we built every feature around that. Built for A Level, O Level, and IGCSE students preparing for Cambridge exams across 250+ subjects. From 9709 Mathematics, 9702 Physics, and 9701 Chemistry at A Level, to 4024 Maths D, 2058 Islamiyat, and 5054 Physics at O Level, to 0580 Mathematics, 0610 Biology, and 0450 Business Studies at IGCSE. If CAIE offers it, PaperStack has it. Past Paper Library 15,000+ CAIE past papers, regularly updated with the latest sessions. Filter by Year, Season, and Variant. Switch instantly between Question Paper and Marking Scheme with one tap, or open both side-by-side in Split Mode. Topical Papers Practice by topic, not just by year. PaperStack generates topical papers for both MCQ and Structured questions across all subjects. Choose Exam Mode to sit a timed session under real exam conditions, or use the graded mode where PaperStack Intelligence scores your structured answers directly against the marking scheme. Interactive MCQ Solver Solve MCQs directly on screen. No printer needed. Auto-marking gives you instant feedback and saves your progress as you go. PaperStack AI Tutor Built on real examiner comments and actual marking schemes, not generic AI. Ask any question and get explanations that reflect exactly how CAIE awards marks. Multiplayer Mode Challenge friends to real-time MCQ or Structured paper races. Choose yearly papers or specific topics, set the quantity, and compete on global leaderboards. Revision becomes something you want to do. Smart PDF Viewer View papers in full with dark mode, bookmarks, a built-in timer, and annotation tools to highlight and take notes directly on the page. Share or print any paper with one tap. Offline Access Download any paper once. Study anywhere, even without a connection. Download PaperStack and turn your revision into results. Disclaimer: All past papers, marking schemes, and related resources available on PaperStack are the intellectual property of Cambridge Assessment International Education (CAIE). PaperStack is an independent revision tool and is not affiliated with, endorsed by, or officially connected to CAIE or Cambridge University Press. We do not claim ownership of any exam content. While we work to keep all resources accurate and up to date, we make no guarantees regarding the completeness or correctness of any material. For official resources, visit cambridgeinternational.org. Privacy Policy: https://paperstack.cc/privacy.html Terms of Use: https://paperstack.cc/terms.html
Latest release
What’s New
Major Update, Bug fixes & much requested advanced Annotation Tool in Multiplayer & Yearly Paper View Improve multiplayer: lobby, game screen, match summary, match detail
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 21, 2026 · 8:17 AM Free
Screenshots
