GPSTest icon


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    GPSTest displays real-time information for satellites in view of your device. A vital open-source testing tool for platform engineers, developers, and power users, GPSTest can also assist users in understanding why their GPS/GNSS is or isn't working.

    Supports dual-frequency* GNSS for:
    • GPS (USA Navstar) (L1, L2, L3, L4, L5)
    • Galileo (European Union) (E1, E5, E5a, E5b, E6)
    • GLONASS (Russia) (L1, L2, L3, L5)
    • QZSS (Japan) (L1, L2, L5, L6)
    • BeiDou/COMPASS (China) (B1, B1-2, B2, B2a, B3)
    • Various satellite-based augmentation systems SBAS (e.g., GAGAN, Anik F1, Galaxy 15, Inmarsat 3-F2, Inmarsat 4-F3, SES-5) (L1, L5)

    *Dual-frequency GNSS requires device hardware support and Android 8.0 Oreo or higher. More at

    Menu options:
    • Inject Time Data - Injects Time assistance data for GPS into the platform, using information from a Network Time Protocol (NTP) server
    • Inject XTRA Data - Injects XTRA assistance data for GPS into the platform, using information from a XTRA server (see for details on gpsOneXTRA)
    • Clear Assist Data - Clears all assistance data used for GPS, including NTP and XTRA data (Note: if you select this option to fix broken GPS on your device, for GPS to work again you may need to ‘Inject Time’ and ‘Inject XTRA’ data)
    • Settings - Switch between light and dark themes, change map tile type, auto-start GPS on startup, minimum time and distance between GPS updates, keep screen on.

    Beta versions:

    Open-source on Github:


    GPSTest discussion forum:!forum/gpstest_android

    Nostalgic for old releases? Don't have Google Play Services on your device? Download old versions here:

    If you want to see the map on the Map tab, you'll need to install Google Play Services.

    Also available on F-Droid:

    Want to measure the *true* accuracy of your GPS?

    Check out GPS Benchmark:

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