5 stars: Correct values of wifi and sim providers in a simple to read meter. Not invasive ads in the free version. This app delivers what it promises, these are the reasons of the 5 star rating.
4 stars: Overall good. What we are missing here is no signals strength from other operators. (Those we are not currently using.)
4 stars: I don't like the advertising.. but that's what pays for the free app.... hence 4 stars. Easy to use, once you're past the ads... and analysed a friend's WiFi problem easily and visually so we now know how to solve it.
3 stars: Good app, but when you have no location available on your android box but it still requires it or it won't get off the screen. Box uses the wifi for location. Even after it is granted zdx it still thinks it is not. You can make out signal strength and will work without location. Unless you are using maps, location is useless for this app. Give you a choice. If you don't use you should still be able to use the app based on signal strength
3 stars: everything works good, ads can be adjusted, only issue is you have to be connected to the network, please add an option to scan the signal of networks not connected. good luck.
2 stars: Very basic, doesn't really do much except tell you useless stats about the WiFi you're connected to. No ability to show interference, signal to noise, details about APs you're not connected to, etc.
...