This application transforms your iPhone into a seismometer, allowing you to measure and analyze seismic vibrations. You can upload your observations to share with the public and utilize various tools for wave analysis, including graphical displays of power spectrum and displacement.
6.1.0
July 24, 2026
We have fixed a bug relating to uploading data to iCloud. You can now configure the iCloud upload directory.
iJishin utilizes the iPhone's built-in acceleration sensors to detect and measure earthquake vibrations. The signals from three sensors are sampled at 100Hz and precisely time-stamped using an external NTP server for accuracy.
iJishin records seismic information such as maximum acceleration, 'SHINDO' (seismic intensity), and occurrence time. It also offers tools for analyzing wave data, including graphical displays of power spectrum, velocity, displacement, and 2D device trajectory.
Yes, iJishin allows you to upload your seismic information, such as maximum acceleration and seismic intensity, to make your observations public. This contributes to a shared database of seismic events.
iJishin is compatible with iPhone, iPad, and iPod touch devices, transforming them into seismometers and data browsers.
The latest version of iJishin is 5.1.3, which was last updated on August 24, 2018. While the app is functional, users should note the last update date.
iJishin has an age rating of 4+, making it suitable for a wide range of users interested in seismic activity.
No, iJishin does not contain advertisements. It is a free application that provides its features without interruption from ads.
Based on available data, iJishin has a rating of 1.0 stars from 1 rating. This indicates a very low user satisfaction score, and potential users should consider this feedback.
