Package recommendation for basic wireless site survey

There used to be an app called InSIDer but i think its gone now (or became a paid app.)

I have a few on my phone however. Ubiquiti's Unifi Network app and their Wifiman This has a heatmap mode.
Wifi Analyzer and another called WiFi Heatmap . One i like is called Network Cell Info Lite . This actually has dedicated signal meters for both LTE and Wifi. It shows channels and other data too.

(edit - fixed links)