QuakeApp gets its data from USGS API.
The USGS Earthquake Hazards Program is part of the National Earthquake Hazards Reduction Program (NEHRP), established by Congress in 1977.
USGS monitor and report earthquakes, assess earthquake impacts and hazards, and research the causes and effects of earthquakes.
QuakeApp is Ad free
This is a beta tester version.
QuakeApp has not official tie with USGS.