ThinkPDF: AI Quiz & PDF Editor

Contains adsIn-app purchases
Content rating
Everyone
500+
Downloads
Content rating
Everyone
In-App Purchases
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

Turn your notes, textbooks and lecture slides into practice quizzes and flashcards in seconds. ThinkPDF is the AI study assistant and full PDF editor in one free app.

πŸŽ“ PDF TO QUIZ & FLASHCARDS (AI STUDY TOOLS)
β€’ PDF to Quiz Maker: open any chapter and get multiple-choice practice questions with instant scoring
β€’ AI Flashcard Maker: convert study material into flashcards you can review and mark as mastered
β€’ Share your quiz score with classmates and challenge them to beat it
β€’ Perfect for exam revision, school, college, nursing, law and certification prep

πŸ€– CHAT WITH PDF & AI SUMMARIZER
β€’ Chat with PDF: ask questions and get answers with page references
β€’ AI Summarizer: key points and takeaways from long documents in seconds
β€’ Select any passage and ask the AI about just that part
β€’ AI Translator: translate PDF pages into 40+ languages

✏️ PDF EDITOR – EDIT ORIGINAL TEXT
β€’ Edit the original text on the page: fix typos, update dates, change sentences
β€’ Smart font matching keeps the layout and typography intact
β€’ Highlight, underline, strikethrough, draw, add shapes and sticky notes
β€’ Digital signature: sign contracts, forms and invoices
β€’ Fill PDF forms, add watermarks and page numbers

πŸ“· DOCUMENT SCANNER WITH OCR
β€’ Scan notes, receipts, book pages and documents with your camera
β€’ Edge detection, perspective crop and scan filters
β€’ OCR turns scans into searchable, copyable text
β€’ Combine many pages into one PDF

πŸ”§ 20+ PDF TOOLS
β€’ Merge PDF, Split PDF, Compress PDF
β€’ Image to PDF (JPG, PNG) and PDF to images or text
β€’ Rotate, reorder, delete and duplicate pages
β€’ Password protect or unlock PDFs, flatten PDF

πŸ“– FAST PDF READER & OFFICE VIEWER
β€’ Smooth reading for long books and research papers
β€’ Dark mode, sepia and night reading
β€’ Full-text search and Text-to-Speech (listen to your PDFs)
β€’ Open Word (.docx), Excel (.xlsx), PowerPoint (.pptx) and TXT files

πŸ”’ PRIVATE BY DESIGN
β€’ Reading, editing and page tools run on your device
β€’ No sign-up required, start in one tap

Free to use, with free daily AI requests. Premium unlocks higher AI limits and removes ads.

Download ThinkPDF and study smarter: your PDF to quiz maker, AI flashcards, chat with PDF and PDF editor in one app.
Turn any PDF into quizzes & flashcards. Chat with PDF, edit, scan, sign, merge
Updated on
Oct 24, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Messages, Files and docs and 3 others
  • This app may collect these data types
    Financial info, Messages and 5 others
  • Data is encrypted in transit

What’s new

β€’ All-new Quiz: choose difficulty and question type, get instant feedback with explanations, track your streak, then retry only the questions you missed
β€’ All-new Flash cards: swipe right if you know it, left to see it again. Missed cards come back until you learn them
β€’ Shuffle, undo, hints and read-aloud for flash cards
β€’ Pro: export your quiz or flash cards as a printable PDF study guide