Vibrotherapy uses your device's vibrate to create some patterns. You can choose from predefined patterns or create your own.
1 - Just be aware that the power of the vibrate depends on your device only
2 - Be also aware that using it for long periods may drain your battery
3 - Very important! Do not use it for long periods as it may overheat your device. Up to 10 minutes would be a reasonable period.
Some facts about vibromassage:
Vibromassage (also called vibratory massage, vibra-massage, vibration therapy) is a type of massage based on the use of mechanical devices for vibration therapy, which pass vibration onto the body surface that is being massaged. Vibromassage can be both general and local.
The application of manual vibration to the human body therapeutically has been known for centuries. The history of vibromassage through mechanical devices is not very long, although the vibration itself as a massaging technique dates back thousands of years.