The earthquake data is mostly retrieved from the US GS (United States Geological Survey) website, which also measures significant earthquakes around the world. There are quite a few apps but the app named Earthquake Alert for Android phones and Earthquake Map and Alert for i OS users are two most popular apps which already have millions of downloads on its respective stores. This can see magnitude 1.0+ from the US and magnitude 4.5+ from across the world.
Features of the App:
Map with magnitude details.
USGS site details.
Satellite Map view.
Compatible with almost all devices including budget smartphones.
Download the App for Android and iOS:
Click here to download Earthquake Map and alerts for iOS Users