Unless there’s some control I can’t find, all it does is pop up a screen with horizontal and vertical accuracy (yay!) and your lat/long/altitude/speed/direction. It doesn’t tell you how many satellites it sees, or signal strength or what systems, so I don’t know if it’s just GPS or also GLONASS/etc., but what it does do it does quickly and easily.

5 GPS metrics displayed nicely on the screen. I really appreciate the accuracy readout in regular (US) units as well as long/lat/altitude readout. Of course the units are probably picking up my phone ‘locale’.This app informs me when to load my workout app (when accuracy is good). That takes a few minutes but realize there’s nothing anyone can do about that. That’s a limitation of the GPS satellite data rate. The time taken to get high accuracy is no greater than what I remember it taking on my high end Garmin outdoors Gos. So far no advertising pop up’s! Don’t remember if this is freeware but I’ll take it.

Waze suggested this app to determine GPS signal strength (which I need to place a network extender in my house). It does give the GPS information that your iPhone is seeing, but I have concerns. My concerns / complaints are:1. No price was listed in the Apple App Store; doesn’t that mean it’s free? I wouldn’t download it if not free. Yet the App Store said “Payment Processed”. There’s a potential dispute.2. Where’s the settings button? How to change from meters to feet/miles? Don’t app developers for products offered in the US know we can’t/won’t use metric only tools?3. Where’s the GPS signal strength indicator? That all I wanted this app for!4. Where’s the battery usage indicator? Waze wears my iPhone battery down so I only use it on long trips. I wanted an app that showed battery usage, so I could determine optimization and modify my usage according.I hope the app developer reads this and addresses; if an update is offered with signal strength & settings this might be a workable solution that I’d rewrite this review for. Else, I’ll trash it.

Best app out there to test GPS accuracy. I just tried a different app in the App Store and the stated accuracy was off. To the person who asked what a flex antenna is that involves taking apart your iPhone and changing the antenna. Not recommended. I used iFixit as a guide to change the antenna if you want to go that route. The rest of the reviews complaining about it being metric. Ridiculous. Just ridiculous. GPS systems work in meters. Your phone converts meters to feet mathematically but the world runs on the metric system. Just ridiculous to give a lower rating because it gives the measurement in meters.