Vibration is a free Android app developed by The Tree Team. It allows you to turn your phone into a vibrate device for testing phone vibration, massages or any other purpose. The app has been tested on various Android devices including Samsung Galaxy, HTC, Sony, and Xiaomi, and has worked well on all of them.

The app is straightforward and easy to use. It has three main features: test vibrate, massage, and more vibrate mode. You can select any of these features from the main screen. The test vibrate feature allows you to check the vibration of your phone, while the massage feature can be used for massaging purposes. The more vibrate mode offers different vibration patterns to choose from.

Overall, Vibration is a useful app for those who want to test their phone's vibration or use it for massages. It is easy to use and has a simple interface. If you are looking for an uncomplicated app for vibration testing or massages, Vibration is worth a try.