MathScope vs DuoNiu Write

MathScope turns equations into graphs you can see and play with. Type a formula and its graph appears instantly; drag a slider and watch it change. From a textbook parabola to a Klein bottle, it all renders smoothly at your fingertips. Free to download: graph y = f(x) and implicit curves, plot 3D surfaces z = f(x, y), animate parameters with sliders, mark zeros and extrema, and explore part of the gallery at no cost. Upgrade to MathScope Pro when you want the full toolkit. 2D GRAPHING • One smart input box: y = x², x² + y² = 9, r = 2sin(3θ) and (cos 3t, sin 2t) are recognized automatically as explicit, implicit, polar or parametric • Overlay several functions, each with its own color and one-tap show/hide • Parameter sliders: write a, b or k in a formula and a slider appears; tap ▶ to animate it • Analysis tools: mark zeros, extrema and intersections; long-press a curve to trace coordinates and the tangent line; show the symbolic derivative f′(x); shade a definite integral with draggable bounds • A keyboard designed for math, so input is fast and accurate 3D SPACE • Surfaces z = f(x, y), implicit surfaces F(x, y, z) = 0, parametric surfaces and space curves • C++-accelerated Marching Cubes engine generates complex implicit surfaces in seconds • Cinematic rendering: physically based materials, environment reflections, bloom, 7 color maps, wireframe mesh and auto-rotate CURATED GALLERY 50+ classic and surprising shapes: cardioid, rose curves, butterfly curve, spirograph, Fourier square wave, Taylor expansions, Mexican hat, Möbius strip, Klein bottle, trefoil knot and more. Tap one to open, edit and animate it. FAVORITES & EXPORT Save the graphs you like, with history kept automatically, and export images to share with friends. MATHSCOPE PRO Unlocks parametric and polar curves, the full 3D space, intersections / derivative / integral tools, the entire gallery, all color maps and ultra-high-resolution meshes, 4K export without watermark, and unlimited functions and favorites. • Yearly (includes a 3-day free trial) and Monthly: auto-renewing subscriptions. Payment is charged to your Apple ID account. A subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. • Lifetime: a one-time purchase, yours to keep. Privacy Policy: https://vaca.vip/mathscope/privacy Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

DuoNiu Write is an iOS app focused on Chinese character writing and stroke-order practice. One character per page—trace along the strokes and get instant scoring and spoken encouragement when you lift your finger. Great for students’ daily practice and for parents learning characters with their children. [Core Practice] • Enter any characters, or start from a school-curriculum poem • Automatic stroke-order demo, tianzi-grid tracing, instant scoring after each stroke • Multiple fonts including regular script, running script, and clerical script; adjustable ink color • Scores saved each time so you can track progress • Add family members’ names for quick practice of common characters [School Poetry] • Browse primary-school curriculum poems by grade • Practice writing, dictation, and recitation modes • Dictation gives line-by-line hints; view the full handwritten work when done • Recitation highlights lines in sync for easier follow-along • Save handwritten works to Photos [Peace of Mind] • No account required; no personally identifiable information collected • Practice history, scores, and settings stay on your device • Missing stroke data is downloaded only with your consent, then cached locally DuoNiu Write brings stroke order, scoring, classical poetry, and recitation together to make practice more fun and structured. Contact us via About in the app with suggestions or feedback.