MathMemoAR vs PDFCrop

Turn abstract math formulas into unforgettable 3D experiences! MathMemoAR transforms the way you learn geometry and algebra. Point your camera at any surface and watch mathematical formulas come alive as interactive 3D models you can walk around, scale, and explore from every angle. WHY MATH MEMO AR WORKS ◆ SEE IT IN AR Place formulas directly in your room. Walk around a 3D cube to understand volume. See how the Pythagorean theorem actually works with colored squares on each side. Learning becomes intuitive when you can touch and explore. ◆ MEMORY STORIES THAT STICK Every formula comes with a clever mnemonic story. "A = π × r²" becomes "A PIRATE (π) times ROSES squared (r²)" — weird, funny, and impossible to forget. These memory hooks are based on proven techniques used by memory champions. ◆ DUAL VIEW MODES Switch between AR mode (place in your real world) and 3D mode (rotate freely on screen). Learn anywhere — with or without AR support. ◆ TEST YOUR KNOWLEDGE Each formula includes an interactive quiz. Earn up to 3 stars and track your progress across all formulas. ◆ BILINGUAL SUPPORT Full support for English and German — switch languages anytime in settings. WHAT'S INCLUDED Free: - 5 essential formulas to get started - Full AR and 3D visualization - Memory stories and quizzes - Progress tracking Premium (one-time purchase): - All 20 formulas unlocked - Geometry: Rectangle, Triangle, Circle, Parallelogram, Trapezoid, Rhombus - 3D Shapes: Cube, Cuboid, Cylinder, Sphere, Pyramid, Cone - Algebra: Pythagorean Theorem, all 3 Binomial Formulas - Perimeter and circumference formulas PERFECT FOR - Students preparing for exams - Visual learners who struggle with abstract concepts - Teachers looking for engaging classroom tools - Anyone who wants to finally remember those formulas - Homeschool families - Adults brushing up on math basics BUILT DIFFERENT This app was created by combining 20+ years of professional experience with cutting-edge AI-assisted development. Every visualization is carefully designed to make the math click - not just memorized, but truly understood. No subscriptions. No ads. One purchase unlocks everything forever. Download MathMemoAR and see math like never before.

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