The app lets you perform a magic trick where you quickly multiply two numbers (seemingly in your head).

It works like this:
- You secretly enter the numbers by tapping on the circle on the screen.
- The result of the multiplication will be presented in the form of vibration patterns.
- Numbers are indicated by corresponding vibration counts - zero is represented by 5 quick vibrations in a row.
- The trick is quick to learn, but it does require some practice. Try it and just follow the instructions on the screen.

The app requires your phone to support haptic feedback.