Bongonaut

If you want a good, solid, under-the-hood look at your GPS hardware, and do some Location Services troubleshooting, this is the app for you. Data is presented in a very clear and comprehensive way. You can reset the GPS from within the app, too. Loaded it on my iPhone 8 while a friend with a 6 did the same, and screen grabbed to show that mine saw multiple satellites, while the 6 was proven defective— no satellite bars. Highly recommended!