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The #1 open-source global navigation satellite system (GNSS) testing app.

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It supports dual-frequency1 GNSS for:

• GPS (USA Navstar)
• GLONASS (Russia)
• QZSS (Japan)
• BeiDou/COMPASS (China)
• Galileo (European Union)
• IRNSS/NavIC (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)
  • Southern Positioning Augmentation Network (SouthPAN) (Australia / New Zealand)

1Dual-frequency GNSS requires device hardware support and Android 8.0 Oreo or higher. See Dual-frequency GNSS on Android for more details.

I welcome contributions to the project! Please see the 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.

• Beta testing: Get early access to new GPSTest versions, and help us squash bugs! See the Testing Guide for details.

• Translating: Want to improve existing translations, or add a new translation? Translate on Transifex or see the Translations documentation.

Questions? Check out the FAQ, the Slack group, and Google Group.

• Crowdsourcing GNSS data: Interested in better understanding the state of GNSS feature support on Android devices? See the article Crowdsourcing GNSS features of Android devices.

• Accuracy: Measuring your device GNSS accuracy? Check out the Measuring Accuracy using GPSTest page, as well as the corresponding article Measuring GNSS accuracy on Android devices.

• Data Output and Logging: Want to know how to output GNSS data to the system log for further analysis? Check out the Data Output and Logging page.

• Building the project: You can open and build this project using Android Studio. For more details, see the Build documentation.

Notable appearances of GPSTest:

• Xiaomi - Xiaomi Redmi Note 9 Pro Max launch, March 12, 2020.
• European Union Global Navigation Satellite Systems Agency (GSA) - Test your Android device’s satellite navigation performance, August 21, 2018.