App for mapping WiFi strength?

In general iOS is not capable of network scanning because of limitations built into the software.

• apps cannot keep using the network in background.

• apps are limited in how much location info they can get in the background.

• apps themselves are limited in working in the background at all.

• apps can only see a subset of wifi network info through the official API.

So an app could theoretically search for networks if you open it up but you wouldn't get much info on signal strength and location and even less when the app is working in the background.

If you want useful network scanning info you will have to use a laptop, or a phone that has less restrictions like Android.

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