EtchDraw vs AutomataStudio

MagicDrawing is a nostalgic drawing app inspired by the classic etch-a-sketch toy. Turn the dial to draw lines, just like the old days — simple, relaxing, and fun! • Choose from multiple colors and line widths • Use dials or directional buttons • Shake to erase your drawing Bring back your childhood creativity in a modern way!

AutomataStudio is a hands-on design tool for mechanical automata. Combine cams, gears, and four-bar linkages on an interactive canvas, connect them with shafts, gear meshes, and belt drives, then bring your contraption to life on an animated timeline. Whether you build kinetic sculptures, paper automata, marble machines, or just love mechanical motion, AutomataStudio lets you prototype and visualize how parts move together before you cut a single piece. KEY FEATURES - Mechanism Library: Drop cams, gears, and four-bar linkages onto a node-based canvas. - Real Kinematics: Each mechanism is driven by a true motion model: cam rise and dwell profiles, gear ratios, and linkage geometry. - Connect and Drive: Link mechanisms with shafts, gear meshes, and belt drives to build full transmission chains. - Animated Timeline: Scrub through a full 360-degree cycle and see every mechanism displacement curve move in sync. - Tunable Parameters: Adjust base radius, rise height, tooth count, module, crank and rocker lengths, phase offset, and speed ratio. - Playback Control: Play, pause, and set playback speed from 0.25x to 4x to study motion at any pace. - Inspector Panel: Select any mechanism to fine-tune its parameters and instantly see the result. - 100% Offline and Private: No account, no network, no tracking. Every project stays on your device. Design, simulate, and understand mechanical motion, all from your iPhone.