What is the WiFi Analyzer (open-source) application, how does it work?

According to the introduction of VREM Software Development, WiFi Analyzer (open-source) is a Tools app on the Android platform. There is currently a 2.1.1 version released on Nov 30, 2019, you can see the details below.

Optimize your WiFi network using WiFi Analyzer (open-source) by examining surrounding WiFi networks, measuring their signal strength as well as identifying crowded channels.

Users' privacy and security is a huge concern these days and WiFi Analyzer (open-source) is designed to use as few permissions as possible. It asks for just enough to perform the analysis. Plus, it is all open source so nothing is hidden! Most notably, this application does not require access to internet, so you can be sure it does not send any personal/device information to any other source and it does not receive any information from other sources.

WiFi Analyzer is under active development by volunteers.
WiFi Analyzer is free, has no-ads and does not collect any personal information.
WiFi Analyzer is not a WiFi password cracking or phishing tool.

Features:
- Identify nearby Access Points
- Graph channels signal strength
- Graph Access Point signal strength over time
- Analyze WiFi networks to rate channels
- HT/VHT Detection - 40/80/160MHz (Requires Android OS 6+)
- Access Point view complete or compact
- Estimated Distance to the Access Points
- Export access points details
- Dark or Light theme available
- Pause/Resume scanning
- Available filters: WiFi band, Signal strength, Security and SSID
- Vendor/OUI Database Lookup

Please visit our website for more helpful information:
https://vremsoftwaredevelopment.github.io/WiFiAnalyzer

Features:
https://vremsoftwaredevelopment.github.io/WiFiAnalyzer/#features
Usage Tips:
https://vremsoftwaredevelopment.github.io/WiFiAnalyzer/#usage-tips
How-to:
https://vremsoftwaredevelopment.github.io/WiFiAnalyzer/#how-to
FAQ:
https://vremsoftwaredevelopment.github.io/WiFiAnalyzer/#faq

GitHub is the place to go for bug reports and code contributions:
https://vremsoftwaredevelopment.github.io/WiFiAnalyzer/#feedback