PureScan vs 错题本

PureScan —— Your truly private on-device document scanner, OCR text extractor, and digital file manager. Tired of expensive weekly subscriptions, intrusive pop-up ads, forced export watermarks, or worrying about confidential contracts and personal IDs uploaded to cloud servers? PureScan is crafted with a single mission: Absolute Privacy & Peak Efficiency. Every edge crop, OCR recognition, full-text index, and PDF encryption runs strictly on your iPhone via the Apple Neural Engine. No network connection, no cloud upload, and zero data tracking. 【Why Users Around the World Love PureScan】 • 100% On-Device Processing: Documents never leave your device. Works offline in airplane mode with zero mobile data consumption. • Instant Full-Text Search: Automatically indexes document content locally. Type any word to locate the exact page in milliseconds. • Professional Searchable PDF: Exports native PDFs with aligned invisible text layers for easy selection, copying, and desktop search. • Completely Clean & Honest: no subscriptions, zero ads, no export watermarks, and zero third-party analytics SDKs. 【Powerful Core Features】 1. Smart Document Camera: - Powered by Apple VisionKit for instant automatic edge detection and multi-page continuous capture. - Manual 8-point corner adjustment with a 2.5× precision magnifying loupe. 2. ID Card & Passport A4 Stitching: - Capture front and back sides of driver’s licenses, IDs, or passport cards with built-in visual guides. - Automatically arranges both sides onto a standard 1:1 scale A4 sheet for instant color or B&W printing. 3. Security Anti-Theft Watermarking: - Built-in presets such as "FOR OFFICIAL USE ONLY" and "CONFIDENTIAL COPY". - Full-bleed diagonal tiling with customizable color (Gray, Red, Blue) and opacity to prevent identity theft. 4. Quick Screenshot & Photo OCR: - One-tap quick extract on the home screen automatically loads your latest screenshot. - Pre-warmed neural engine ensures zero lag, instant recognition, and one-tap text copying. 5. Page Management & Fast Sharing: - Grid thumbnail view, drag-and-drop page reordering, single-page deletion, rescanning, and rotation. - Share or save individual pages instantly without sending unnecessary pages. 6. Document Categories & Smart Search: - Organize files with customizable category capsules on the home screen. - Search across document titles and OCR text with highlighted context snippets. 7. Multi-Format High-Quality Export: - Searchable PDF (with embedded text layer and zero white-edge fit). - Password-protected PDF with standard AES encryption. - High-resolution multi-page long image (JPEG) or raw TXT text. 【Perfect For】 • Business & Office: Contracts, expense receipts, NDAs, invoices, whiteboard notes. • Students & Educators: Lecture slides, study notes, book digitization, research papers. • Personal Records: IDs, passports, insurance cards, tax documents, warranty certificates. 【Our Privacy Promise】 • PureScan does not request internet access permissions. • Camera access is used solely for document capture; Photo Library access is requested only when saving images. • What's on paper stays on your iPhone. —— For support or feedback, please reach out via "More → Feedback & Suggestions" inside the app.

错题整理不用再手抄！拍照上传即可快速识别题目，自动收录到专属错题本，随时进行答题练习，并通过错题统计了解掌握情况，帮助你发现薄弱环节，让复习更有方向、更有效率。 【拍照识别】 拍摄或上传题目图片，快速识别题目内容，减少手动录入步骤，让错题整理更加简单。 【错题收集】 将学习和考试中遇到的错题统一保存，方便随时查看、整理和复习，逐步建立属于自己的错题资料库。 【答题练习】 支持对已收录题目进行再次作答，通过反复练习加深理解，避免同类错误重复出现。 【错题统计】 自动记录答题结果和错题情况，清晰展示学习数据，帮助你了解薄弱内容，合理安排复习重点。 适合学生日常作业整理、考试复习和知识巩固。告别杂乱的纸质错题，用更轻松的方式整理每一道错题，让每一次出错都成为进步的开始。 隐私政策：https://docs.qq.com/doc/DY0JteU1aQWF1dXZE 用户协议：https://docs.qq.com/doc/DY2dDbFBTTmdPRW5J 技术支持：https://docs.qq.com/doc/DY29mS2F4emFrU2xR