<p>No ads, and no trackers - <i>GPSTest</i> 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, <i>GPSTest</i> can also assist in understanding why your GPS/GNSS isn't working.</p><p>Supports dual-frequency* GNSS for:</p><ul><li>GPS (USA Navstar) (L1, L2, L3, L4, L5)</li><li>Galileo (European Union) (E1, E5, E5a, E5b, E6)</li><li>GLONASS (Russia) (L1, L2, L3, L5)</li><li>QZSS (Japan) (L1, L2, L5, L6)</li><li>BeiDou/COMPASS (China) (B1I, B2a, B2b, B3I)</li><li>IRNSS/NavIC (India) (L1, L5, S)</li><li>Various satellite-based augmentation systems SBAS (e.g., GAGAN, Anik F1, Galaxy 15, Inmarsat 3-F2, Inmarsat 4-F3, SES-5) (L1, L5)</li></ul><p>*Dual-frequency GNSS requires device hardware support and Android 8.0 Oreo or higher. More at <a href='https://medium.com/@sjbarbeau/dual-frequency-gnss-on-android-devices-152b8826e1c' target='_blank' rel='nofollow noopener'>Medium</a>.</p><p>The "Accuracy" feature lets you measure the error in your device's position against your <b>actual</b> location (entered by you). Other apps show you the <b>estimated</b> accuracy, which is generated by your device. <i>GPSTest</i> lets you to compare this estimated accuracy to <b>actual</b> accuracy!</p><p>Menu options:</p><ul><li>Inject Time Data - Injects Time assistance data for GPS into the platform, using information from a Network Time Protocol (NTP) server</li><li>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](https://www.qualcomm.com/news/releases/2007/02/qualcomm-introduces-gpsonextra-assistance-expand-capabilities-standalone).</li><li>Clear Assis