The Wifi Analyzer app is not new but is frequently updated, and it continues to prove useful for many users who need to fix problems on their networks easily and without having to have a lot of communication skills.
Simply install to begin analyzing access points around the smartphone, assessing the signal strength and monitoring its evolution on the various channels available. Details are presented in a relatively easy-to-understand view and in graphs, helping users spot problems and fix them. The interface is in Portuguese, which is an additional help among so many technical terms.
The more knowledge you have, the more you will be able to draw on this information to configure routers or switch to more powerful networks, and in the settings area you can make a number of settings that help fine tune your Wi-Fi signal. Wi-Fi bandwidth, signal strength, security and SSID (the name of the networks), but can also see the manufacturers.
The open source application has a group of volunteers to update the data and is free, without advertising, and designed to use as few permissions and data as possible, respecting the security and privacy of users.