TimeSim app for iPhone and iPad

TimeSim is a mechanical watch simulator, using over 10,000 trigonometry operations to model and draw an entire watch movement. There are no pre-rendered images or animations, everything is calculated in real-time.

Double-Tap - Zoom in to see more detail

Binoculars - See the named elements of a watch movement
Running - Accelerate the movement to see all the cogs turning
Time - See the watch escapement in action
Safari - More information available on the TimeSim website

Open the app at different times of day to see the lighting and mainspring changes.