SectionLab vs MieTsumi

SectionLab transforms abstract geometry into a hands-on, visual experience. Perfect for students, teachers, and anyone curious about how 2D relates to 3D. BUILD mode — See 2D become 3D Watch flat shapes transform into solid objects through three different mechanisms: • Rotate: Spin a rectangle into a cylinder, a triangle into a cone, or a semicircle into a sphere • Translate: Extrude a circle upward to form a cylinder, or a square into a cube • Roll: Curl a flat plane into a cylindrical surface Drag the progress slider to control how far the transformation goes, or hit Auto Play for a seamless demonstration. CUT mode — Slice 3D shapes to see inside Choose from five geometric solids (cube, cuboid, cylinder, cone, triangular prism) and cut them with an adjustable slicing plane: • Move the cutting plane up/down and tilt it in any direction • Pull the two halves apart to examine the cross-section in detail • Toggle visibility of each half to focus on either side • Use the Cross-Section Dictionary for instant access to classic cuts (circle, ellipse, triangle, hexagon, and more) Why SectionLab? • Fully interactive 3D — pan, rotate, and zoom with touch gestures • No internet required — all 3D rendering runs locally • Multi-language support: English, 中文, 日本語, 한국어 • iPad-optimized with large touch targets • Clean, distraction-free interface designed for focused learning Perfect for: - Middle school and high school geometry students - Teachers looking for classroom demonstration tools - Self-learners exploring spatial reasoning - Anyone curious about the math behind 3D shapes

MieTsumi is a simple 3D block app for children and parents. Place blocks, change colors, rotate the view, and explore block structures from many angles. Children can play freely while learning how hidden blocks, top views, side views, and stacked shapes work. Transparent view, wireframe view, and antenna view help make invisible blocks easier to understand. Antenna view uses small vertical lines instead of numbers to show stack height, so children who are not yet comfortable with numbers can still count by looking. The full version unlocks larger grids, additional colors, shadow mode, photo saving, and more. In shadow mode, children can move the light and observe how the block shadows change. There are no ads, no account registration, and no tracking. MieTsumi is a small, safe 3D block playground for learning spatial thinking through play.