I’m currently in a situation where I’m responsible for optimizing the Wi-Fi network in a moderately sized office. The challenge is that some areas have weak or no signal, and we suspect there are dead zones. We need to precisely identify these areas to improve our network coverage.
Hate to say this (being an iPhone user) but the Android apps are way better :-( If you can face using one try https://play.google.com/store/apps/details?id=com.manageengine.wifimonitor
Apple tweaked crippled the API used by the tools on mobiles a few years ago and quality of results dropped dramatically even for home use.
If you have a MacBook try https://www.netspotapp.com and request the free trial (no obligations is their byline) but TBH its worth the entry cost (£144) to allow you to check the results of the changes and redo each time the office moves around :-) The results are way better (i.e. more accurate) than on a mobile app.
iStumbler (i think?) on macOS is a good app for signal strength, etc. Free but doesn’t have mapping abilities.
