Android devices have a vibration sensor – accelerometer. It is a sensitive sensor that reports the device vibrations.This tool is powerful vibration meter tool.It has the following features: – shows vibrations in real time – saves vibration data into SD card – provides configurable sound alarm that may be used to: – detect the earthquakes when you sleep – detect if somebody opens the door when you sleep It is recommended to use the battery charger when it works for a long time.If you want to recommend the alarm feature that may recognize earthquakehttp://www.facebook.com/pages/Earthquake-Alarm/311308608954778We will also use this facebook page to keep you informed about the work progress and current activities and plans for the future.This application comes with ABSOLUTELY NO WARRANTY.Notice:There is a problem that occurs on some devices. Some devices may not provide the data when from the vibration sensor when the screen is off. This is an Android error. We are trying to find a good workaround.Send us the information if the application does not work, pleaseVery deep technical information http://code.google.com/p/android/issues/detail?id=3708