Netmonitor is described as 'Monitor GSM/CDMA/LTE network: current and neighboring cell infos, signal strength. Multi SIM support (when possible). Use GPS/geolocation. Generate database with custom info on cells. Export log to file CLF/KML. Map shows cell location. List WiFi access points' and is a Network Monitor in the security & privacy category. There are six alternatives to Netmonitor for a variety of platforms, including Android, Rust, F-Droid, Mac and Windows apps. The best Netmonitor alternative is SnoopSnitch, which is both free and Open Source. Other great apps like Netmonitor are Network Survey, Android IMSI-Catcher Detector, Network Cell Info and Cell Signal Monitor.
Handy charts and lot of features. Log is very useful.