AeroWiFi: read the radio before changing the router

A router’s admin page offers a channel setting, a band choice and a vague sense that something in the room could be better. One response is to change a value, walk around with a phone and form an impression. What is missing is a look at the air before the change: which networks are nearby, how strong they are where you actually sit, and which channels they crowd.

A view of the nearby environment

AeroWiFi is an Android Wi-Fi analyzer from VMCSoft Digital, published on Google Play under the developer name VMCSOFT. It lists the access points Android reports to it, with signal strength, frequency, channel and security type, draws channel graphs for the 2.4 GHz and 5 GHz bands so overlap is visible, and shows your current connection’s IP address, gateway, DNS servers, channel and link speed. From the scan it rates channels and suggests less crowded ones. That suggestion is an input to a decision; changing the router is a separate manual step you take yourself.

Everything shown comes from what Android exposes to apps. That is why the app asks for location and, on newer Android versions, nearby-devices permission: the operating system ties Wi-Fi scanning to them. The privacy policy explains the reason for each permission and states that analysis happens on the device with no VMCSoft backend involved. Standard Android and store diagnostics may still exist under your own settings. Device model, Android version and system restrictions can limit what a scan returns, so a short list is sometimes a platform limit rather than an empty room.

What a scan can and cannot tell you

The graph shows Wi-Fi networks that announce themselves. It is not a spectrum analyzer. A microwave oven or a neighbor’s non-Wi-Fi device can affect the band without appearing in the list, and a crowded channel is one explanation for poor performance, not proof of it. Link speed is the negotiated rate between phone and access point, which is not your Internet download speed. Measuring the path beyond the router is a different question and a different tool.

A useful pattern is one controlled change. Suppose the graph shows your 2.4 GHz channel shared with several strong neighbors while another channel is quieter. Note the signal and channel view in the two or three places where you actually use the network, change that one setting on the router, then return to the same places with the same phone and recheck. If the devices that mattered behave better, keep it. If not, roll the change back or keep investigating. One trial does not rule the channel out, because the phone, the time of day and the neighbors’ activity can all shift between readings. AeroWiFi does not guarantee the change helps, and using it does not make two readings fully comparable on its own. It gives you a view of the air to record before and after.

Look before the next adjustment

Before the next router change, open the scan where the problem happens and read the channel graph first. The Play listing has the current release, and the privacy policy documents what the app accesses and the limits of what it reads.