GPSTest 
The #1 open-source global navigation satellite system (GNSS) testing app
It supports dual-frequency¹ GNSS for:
- GPS (USA Navstar)
- GLONASS (Russia)
- QZSS (Japan)
- BeiDou/COMPASS (China)
- Galileo (European Union)
- IRNSS (India)
- Various satellite-based augmentation systems (SBAS):
- Wide Area Augmentation System (WAAS) (USA)
- European Geostationary Navigation Overlay Service (EGNOS) (European Union)
- GPS-aided GEO augmented navigation (GAGAN) (India)
- Multi-functional Satellite Augmentation System (MSAS) (Japan)
- System for Differential Corrections and Monitoring (SDCM) (Russia)
- Satellite Navigation Augmentation System (SNAS) (China)
- Soluciόn de Aumentaciόn para Caribe, Centro y Sudamérica (SACCSA) (ICAO)
¹Dual-frequency GNSS requires device hardware support and Android 8.0 Oreo or higher. See Dual-frequency GNSS on Android for more details.
Questions? Check out the FAQ, our Slack group, and Google Group.
Beta Testing
Get early access to new GPSTest versions, and help us squash bugs! See our Testing Guide for details.
Data Output and Logging
Want to know how to output GNSS data to the system log for further analysis? Check out our Data Output and Logging page.
License
GPSTest is licensed under Apache v2.0
Building the project
You can open and build this project using Android Studio. For more details, see our Build documentation.
Contributing
We welcome contributions to the project! Please see our Contributing Guide for details, including Code Style Guidelines and Template.
Don't know where to start? Take a look at the issues marked with the your-first-pr label and comment to let me know if you're interested in working on it.
Translations
Want to improve existing translations, or add a new translation? See our Translations documentation.