Hypomnema vs Surface Explorer

Boost Your Learning with Hypomnema: The Ultimate Flashcard App! Whether you're mastering a new language or reinforcing what you've learned, Hypomnema makes studying effortless and engaging. Create custom decks, add flashcards, and supercharge your learning with smart features designed to enhance your experience. Key Features: • Create & Organize Decks – Easily build decks and flashcards to structure your learning. Assign languages to decks for focused study sessions. • Auto-Translation – Save time with automatic translations! When adding cards, Hypomnema translates your input instantly into the selected language, making vocabulary building seamless. • Smooth Animations & Haptic Feedback – Enjoy an intuitive experience with satisfying animations and subtle haptic feedback when flipping cards. • Effortless Learning – Whether you're memorizing new words or reviewing past lessons, Hypomnema helps you stay on track with an interactive, distraction-free interface. Turn studying into a fun and efficient habit! Download Hypomnema today and take your learning to the next level. "Hypomnema: Flashcards" plans for ad-free usage: • Monthly: $0.99 • Annual: $7.99 You may purchase an auto-renewing subscription through an In-App Purchase. • Auto-renewable subscription • Monthly: $0.99 • Annual: $7.99 • Your subscription will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration selected) unless auto-renew is turned off at least 24 hours before the end of the current period. • Current subscription may not be cancelled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase. • Privacy policy: https://sites.google.com/view/hypomnema-privacypolicy/home • Terms of use: https://sites.google.com/view/hypomnematermsofservice/home

Surface Explorer is a high-performance visualizer for intricate mathematical surfaces — 2D manifolds embedded in three- or four-dimensional space, and 3D slices of four-dimensional hypersurfaces — bringing abstract geometry to life with real-time GPU rendering. KEY FEATURES • Cross Section — slice four-dimensional hypersurfaces and watch their 3D sections change shape as you rotate them in 4D or slide the cutting plane along the fourth axis, even along a 4D camera path. • Ray Marching Engine — real-time rendering of implicit surfaces and signed-distance fields, with procedural displacement, transparency, adjustable shells, and a precise mode for high-degree equations. • Multi-Mesh Surfaces — build figures from several independent grids, set with a single field or a script, each with its own color, transparency, texture, image and domain. • Solid Curve — write a curve in 3D or 4D and see the tube drawn around it, with adjustable thickness; several tubes from a script. • Surface Borders — add a tube along the edges of a parametric surface, with its own color, texture and thickness. • Geodesic Flow — explore intrinsic geometry on curved manifolds (S³, H²×R, SL(2,R) and more), integrating geodesics from initial conditions. • 4D Spatial Exploration — dedicated controls for hyperspatial rotation (Omega, Phi, Psi), projection, and 3D and 4D camera paths. • 4D Lighting Models — Directional, Observer, and Slice lighting designed for hyperspace. • Dynamic GLSL Scripting — write custom shaders for procedural textures and surface logic in the built-in editor. • Backgrounds — images and procedural effects, fixed on screen or wrapped around the scene as a sphere, cylinder or cube. • Audio-Visual Synthesis — synchronize geometric parameters with a mathematical sound synthesizer. • Video Recording — capture your explorations directly in the app and save them to your device. A library of ready-made presets ships with the app, from classic parametric surfaces to black-hole ergospheres, curved-space tori and slices of the 3-torus, together with a searchable built-in manual. Built with Qt and Metal for smooth, native performance on iPhone and iPad.