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 medium.com/@sjbarbeau/dual-frequency-gnss-on-android-devices-152b8826e1c.

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 goo.gl/3RjWX 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:
play.google.com/apps/testing/com.android.gpstest

Open-source on Github:
github.com/barbeau/gpstest

FAQ:
github.com/barbeau/gpstest/wiki/Frequently-Asked-Questions-(FAQ)

GPSTest discussion forum:
groups.google.com/forum/#!forum/gpstest_android

Nostalgic for old releases? Don't have Google Play Services on your device? Download old versions here:
github.com/barbeau/gpstest/releases

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

Also available on F-Droid:
f-droid.org/packages/com.android.gpstest.osmdroid/

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

Check out GPS Benchmark:
play.google.com/store/apps/details?id=com.gpsbenchmark.android
From version GPSTest 3.1.5:
• Send feedback - Use this navigation drawer option to ask questions or report problems
• New satellite shapes for QZSS and SBAS - See the updated shapes in the Sky view Legend
• Support for SBAS Astra 5B - Now visible in Status and Sky views
• Chinese & German translations - Thanks to wangkf & SIRSteiner!
• Bug fixes - See bit.ly/gpstest-releases
Variant
Arch
Version
DPI
(Android 2.3+)
Latest: 2.1.10 on November 27, 2016
(Android 4.0+)
Latest: 3.1.5 on August 21, 2018
All versions
August 21, 2018
November 27, 2016