Features
Everything in the studio
One window: build the mechanism, run it, read the numbers, export the figure. Free is for testing the physics: build, run, step and scrub. Items marked Pro are part of Pro; in the studio they show a padlock on Free.
Build
Everything you need for a mechanics problem, placed with a click and snapped to surfaces.
Bodies and supports
Circles, boxes, polygons, wedges, your own outlines; grounds and walls at any angle; pin, fixed and sliding supports; slots and guides; liquids that buoy.
Ropes, cables and pulleys
Ideal cables and ropes with mass, wrapped over pulleys, with capstan friction and tension you can read.
Springs, rods, bars and joints
Pin joints, welds, sliders, coil springs and dampers, rigid rods and bars for trusses.
Gears and drives Pro
Spur gears, ring gears and racks that mesh tooth by tooth; belts and roller chains; thrusters.
Slice, edit points and parts Pro
Cut bodies with a line, edit any polygon's corners, and save a mechanism as a part to reuse.
Simulate and analyse
A fixed time step, SI units and exact joints: the classic problems are tested against their textbook formulas.
Time bar
Scrub through the run, step frame by frame, go to a time, make now t = 0.
Graphs and the data table Pro
Plot any quantity live, add formula columns with units, statistics and theory curves, export CSV.
Free-body diagrams and member forces Pro
Every force on a body, drawn and labelled; truss members coloured by tension and compression.
Python in the browser Pro
Build scenes in loops, control a body every step, run experiments: sandboxed, nothing to install.
Parameter sweeps and Monte Carlo Pro
Vary a value over a range, run the scene for each and tabulate or plot the results. Or scatter values at random and get each result as mean ± standard deviation, with error bars.
Figures
Line art in the style of classic dynamics books, exported as vectors so it stays sharp in print.
Labels and LaTeX Pro
Italic labels that follow their bodies, with LaTeX in any label.
Figure annotations Pro
Dimension arrows, angle arcs, coordinate frames, centre lines, gravity arrows, stroboscopic snapshots, bevel and worm gear drawings.
SVG, PDF, PNG and TikZ Pro
The figure as you see it, as a vector file or as TikZ code that compiles in LaTeX.
Video and GIF Pro
Record the motion in figure style for slides and lectures.
Teaching
The same model gives the lecture animation, the exam figure and the answer.
Presenter mode Pro
The scene full screen with large controls; annotations appear step by step.
Exam variants Pro
Random values for chosen parameters, every variant simulated, and a LaTeX exam with solutions and an answer key.
Courses
Share a template library with a whole course. Paid per course or seat, by invoice.
Templates and library
Start from a classic problem instead of a blank page.
60+ official templates
Projectiles, Atwood machines, pendulums, collisions, gear trains, trusses and more, in ten topics.
My Assets Pro
Your own library of scenes, projects, parts and scripts, on this device and in the cloud.
Community marketplace Pro
Scenes, parts and scripts made by other users, and publishing your own.
Try it on a real problem
Open a template, press Space, and change a number.