GPS Tester - GPS Super Toolbox

GPS Tester is a professional GPS and GNSS diagnostics app for Android that turns your phone into a real-time satellite, signal, map and location accuracy analyzer.

Built for platform engineers, Android developers, field testers, device reviewers and advanced users, GPS Tester helps you understand what your device is receiving, which satellites are used for your fix, how strong each signal is, and why GPS or location services may not be working as expected.

Whether you are debugging weak GPS reception, validating location accuracy, checking dual-frequency GNSS support, comparing satellite signal strength, logging GNSS data, or troubleshooting assisted GNSS data, GPS Tester gives you clear technical data in real time.

Key Features

• Real-time GPS / GNSS status
View latitude, longitude, altitude, mean sea level altitude, speed, bearing, estimated horizontal and vertical accuracy, TTFF, PDOP, HDOP / VDOP, satellites in view, satellites used in fix, and live positioning status.

• Satellite signal monitoring
Inspect GNSS and SBAS satellites with signal strength, C/N0, carrier frequency, azimuth, elevation, almanac, ephemeris and used-in-fix indicators.

• Sky view and signal bar chart
See satellites in a sky plot or compare every visible signal at a glance with a real-time C/N0 bar chart.

• Real GPS accuracy testing
Compare your device’s estimated accuracy with a ground truth location entered by you. Set your real location manually, tap it on the map, import a Geo URI QR code, or open GPS Tester from compatible apps.

• Maps and field instruments
Use map and satellite views, compass tools, motion data, speed chart, heading, altitude, UTC and local time, sunrise / sunset, day length, and a day / night world map with the solar terminator.

• GNSS logging and export
Log NMEA sentences, raw GNSS measurements, navigation messages, GnssStatus, location fixes, orientation data, and supported GNSS antenna information to CSV or JSON.

• Assisted GNSS tools
Inject time data from an NTP server, inject PSDS / XTRA-style predicted satellite data on supported devices, and clear GNSS assistance data when troubleshooting difficult fixes.

• Background GNSS and notification support
Keep GNSS running in the background when needed and monitor satellite / signal counts from a live status notification.

• Wear OS support
Check core GNSS status information directly from a supported Wear OS device.

Supported GNSS Systems

• GPS / Navstar
• Galileo
• GLONASS
• QZSS
• BeiDou / COMPASS
• IRNSS / NavIC
• SBAS systems including WAAS, EGNOS, GAGAN, MSAS, SDCM, BDSBAS / SNAS, SACCSA and SouthPAN

Dual-frequency GNSS requires supported device hardware and Android 8.0 Oreo or later. Raw GNSS measurements, navigation messages and antenna information depend on Android version and device support.

GPS Tester is ideal for Android developers, platform engineers, GNSS researchers, field testers, device reviewers, mapping professionals, outdoor power users, and anyone who wants to understand GPS, GNSS, SBAS, satellite signals and Android location accuracy in detail.

GPS Tester helps you inspect satellite signals, analyze GNSS performance, test GPS accuracy, log location data, troubleshoot weak GPS fixes, and better understand how your Android device determines location.