GPSTest

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

Install

Features

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)

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

Screenshots

More screenshots

Contributing

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.

FAQ

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.

Donate

GPSTest is free and open-source, and I work on it on my lunch breaks as a side project! If you'd like to support GPSTest, please consider buying me a coffee.

Trusted by industry experts

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.

zaixiaoa/gpstest