This App provides both sound level meter and vibration meter (Seismograph). Seismograph can be used in daily life to detect earthquakes and other seismic activity. It can be used to monitor seismic activity around a building or structure to ensure that it is safe. ** However, the vibration or earthquake sensors provided by this app are for reference only. This is useful for detecting vibrations, but it is not a professional tool. This is for reference only, so please consult an expert for accur