Just short of great

I have been using this app for years. It has only one shortcoming. Being able to set the alert threshold based on the Richter scale is good so that you are not alerted by every little tremor. However, if the alert threshold could also be based on the Shindo scale, I would rate this at 5 stars.
For example, with the app, you can set an alert to notify you if the event reached Richter scale 4 or higher. However, the Shindo scale may only be a 1. In this case, no need for an alert.
Ideally, the app could allow for notification if the event reaches Richter scale 5 and/or Shindo scale 3.

gealbertson about Japan Alert, v1.7.2