Carousel app for iPhone and iPad
This application is for counting the rotation of your iPhone.
Place the iPhone on a smooth flat table and spin it clockwise quickly.
You can see the counter even when the iPhone spins at high speed.
Optionally, you can choose any photos for display.
Its recommended to use iPhone 3G or iPod touch (2nd generation) to keep spin for a long time period.
Its better to use an acrylic case to avoid scratches.
Demonstration video is available at support website.