When there is no violin bow, it is an application for assisting practice of a swinging practice.

Feature:
Using the accelerometer, the practice which maintains and moves the same angle is helped.
If the angle changes, this will tell you to sound.
The change condition of the angle is known in the pitch of sound.
Sensitivity regulation is possible.

Usage:
As you have a bow, you have iPhone.
If a central button is pushed with the thumb, the angle of the moment of pushing will be memorized.
Swinging practice with the button hold.
Please practice swinging so that sound does not sound if possible (with a Good display).
Sound pitch becomes high, so that change of an angle becomes large.
Let's practice swinging, being cautious of especially a motion of your elbow.

*A sound small also at the time of Good has come out.
*Since gravity changes when returning a bow, even if the angle does not change, sound will sound.