GPSTest

barbeauDev

About this app

No ads, and no trackers - GPSTest displays real-time information for GNSS and SBAS satellites in view of your device. A vital open-source testing tool for platform engineers, developers, and power users, GPSTest can also assist in understanding why your GPS/GNSS 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)
• IRNSS/NavIC (India) (L5, S)
• 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 https://medium.com/@sjbarbeau/dual-frequency-gnss-on-android-devices-152b8826e1c.

The "Accuracy" feature lets you measure the error in your device's position against your *actual* location (entered by you). Other apps show you the *estimated* accuracy, which is generated by your device. GPSTest lets you to compare this estimated accuracy to *actual* accuracy!

Menu options:
• Inject Time Data - Injects Time assistance data for GPS into the platform, using information from a Network Time Protocol (NTP) server
• Inject PSDS Data - Injects Predicted Satellite Data Service (PSDS) assistance data for GNSS into the platform, using information from a PSDS server. Note that some devices don't use PSDS for assistance data - if this is your device, you'll see a message saying "Platform does not support injecting PSDS data". PSDS is the generic term for products like [XTRA assistance data](http://goo.gl/3RjWX).
• Clear Assist Data - Clears all assistance data used for GNSS, including NTP and XTRA data (Note: if you select this option to fix broken GNSS on your device, for GPS to work again you may need to ‘Inject Time’ and ‘Inject PSDS’ data. You may also see a large delay until your device acquires a fix again, so please use this feature with caution.)
• 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:
https://play.google.com/apps/testing/com.android.gpstest

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

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

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

Nostalgic for old releases? Don't have Google Play Services on your device? Download old versions here:
https://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:
https://f-droid.org/packages/com.android.gpstest.osmdroid/

Ratings and reviews

fast, noninvasive, ad-free app. unlike many of the other GPS test apps, this doesn't require unnecessary access to phone data, camera etc, it just needs location. app is quick to locate satellites and provides good info. interface is basic, but is clear and easy to understand. and no ads!! its like it was built by people who just care about making a good tool. good app!!

It doesn't have many features, which is fine because all the features it does have are more or less first rate and the primary ones you would want. What I really like is that you can help build the GNSS spreadsheet for phone GPS capabilities. Thanks, barbeauDev. Best wishes, man.

GREAT!! Very good app!! Found the link on Github. Helped me finally figure out why I got no TTFF reported with several GPS apps I use. All worked on older phones/tablets but not on Android 7.0. TTFF first didn't show up in this one too till I turned off the "use GNSS APIs" in the provided settings options. Then TTFF showed up correctly when letting it use the legacy GPSStatus.Listener. Searching on internet didn't give me a hit on a bug in these APIs but as it seems there is? I've turned GNSS usage back on again, being more accurate as I understood. Anyway, thnx dev for this great app. Love the map future too BTW :)

What's new

• "Force full GNSS measurements" setting (Android 12 and up) - No more digging into the Android system developer mode. See https://bit.ly/gnss-force-full-measurements for details.
• Better capture of device GNSS capabilities (Android 12 and up) - Uses GnssCapabilities API for GPSTest Database. See https://bit.ly/gpstest-database-article for details.
• Improved app accessibility - Better labels that are announced if TalkBack is enabled.
• Bug fixes - see http://bit.ly/gpstest-releases