Ubiquiti WiFiman

Ubiquiti offers a WiFiman mobile app that provides a suite of tools to monitor, analyze, and improve Wi-Fi performance.

https://blog.ubnt.com/2018/12/11/introducing-wifiman/

https://itunes.apple.com/us/app/ubiquiti-wifiman/id1385561119?mt=8

https://play.google.com/store/apps/details?id=com.ubnt.usurvey