Compounds! vs PDFCrop

Learn to read and write Chinese characters in the order that makes the most sense. Compounds helps you master the most common simplified Chinese characters with a focused, research-backed learning path. Instead of throwing random characters at you, the app introduces them in an order designed to improve retention and reduce frustration, combining character frequency with structural relationships so new characters build naturally on ones you already know. Each study session is designed to help you: Learn high-value characters first Practice writing from memory Reinforce pronunciation and meaning Review at the right time so you remember more with less effort Compounds is built for learners who want a smarter way to study Chinese characters, whether you are starting from scratch or filling in gaps in your reading and writing. Why this order works: Compounds is inspired by research on efficient Chinese character learning strategies, especially work showing that character frequency and structural relationships can be combined to create a more effective progression. Optimal learning order based on: K. Zhao, D. Zhao, J. Yang, W. Ma and B. Yu, “Efficient Learning Strategy of Chinese Characters Based on Usage Frequency and Structural Relationship,” 2019 IEEE 4th International Conference on Big Data Analytics (ICBDA), Suzhou, China, 2019, pp. 351-355, doi: 10.1109/ICBDA.2019.8713245. Subscription A subscription is required for full access to all features. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Crop, rotate, and split PDFs fast on iPhone and iPad. PDFCrop helps you remove white margins, fix page orientation, split large files into smaller PDFs, and create clean print-ready documents in just a few taps. Import a file, preview changes instantly, and export without sending your documents to external servers. ---- Why Users Choose PDFCrop • Fast PDF cropper for precise white-margin cleanup • Rotate pages to fix sideways or upside-down scans • Built-in PDF split tools for flexible document output • Batch workflows to apply edits across entire documents • Real-time preview before export • 100% on-device processing for privacy ---- Core Features 1) Smart PDF Cropping • Trim white borders from scanned and exported PDFs with manual precision • Drag crop handles for exact page control • Keep your content while removing empty margins 2) Rotate Pages & Fix Orientation (NEW) • Rotate individual pages left or right in seconds • Fix sideways scans and upside-down pages • Pro users can rotate entire documents at once • Perfect for scanned books, lecture notes, and contracts 3) Batch Processing for Multi-Page Documents • Edit one page and apply the same crop to all pages • Ideal for long reports, lecture notes, books, and contracts • Saves time on repetitive PDF cleanup tasks 4) Split PDF Files • Split a large PDF into smaller documents • Create focused files for sharing, review, or storage • Combine cropping, rotating, and splitting for cleaner workflows 5) Export and Share • Export edited PDFs while preserving readability • Save to Files, iCloud Drive, or share to other apps • Create cleaner PDFs for printing, reading, and archiving 6) Privacy-First by Design • All processing happens locally on your device • No account required • No document upload for core editing flow ---- Best For • Students cleaning scanned lecture notes and research papers • Professionals preparing contracts, reports, and forms • Anyone who wants smaller, cleaner, properly oriented PDFs ---- Free & Pro PDFCrop is free to use and supported by ads: • 1 free export to start — out of exports? Watch a short ad for another free one • Free exports carry a small PDFCrop badge • Edit one page at a time — your first batch apply is free to try Need just one perfect file? One Clean Export is a small one-time purchase that gives you a single export with no watermark and no ads. Upgrade to Pro with a one-time purchase — no subscription, no hidden fees — to unlock: • Unlimited PDF exports • No watermark on your exports • A completely ad-free workflow • Batch-apply crops, splits, and rotations to every page ---- Compatibility • iOS 18.0 or later • Optimized for iPhone and iPad • Built with native iOS PDF frameworks for smooth performance ---- Support Use in-app Help & Feedback, or contact: support@mzjpg.com