In Unity vibration system is poorly developed
Only one way on Unity to use the vibration feature is iPhoneUtils.Vibrate()
But plugin provides great opportunities
In your game or application project, you will be easily able to:
-Check whether the hardware has a vibrator
-Vibrate with a given pattern
-Vibrate constantly for the specified period of time
-Turn the vibrator off
Features:
- Works on Unity free version.
- Full documentation included.
- Documented demo example.
- "Safe code".
It will be like using the native SDK.
Example .apk - Vibration.apk
Documentation - Vibration.pdf