GPS

gpstest is an open-source global navigation satellite system (GNSS) testing app that helps with troubleshoot GPS data.

The app helps determine

• which GNSS satellite networks a phone supports (Beidou, Galileo, GLONASS, GPS, QZSS, etc.)
• the satellites it can see and is using at any given time,
• which frequencies your device listens on (whether it supports dual band signals, for example)
• the accuracy of the data the phone reports