Paid and free Wi-Fi analyzers: which is better? Wi-Fi network analyzer - select the fastest and highest frequency channel

The article discusses free software running Microsoft Windows, which allows for a preliminary analysis of the radio coverage of the territory for the presence of third-party equipment operating in the Wi-Fi range 2.4/5 GHz. A comparison was made of the technical features of the software under consideration.

Introduction

In wireless networks, the communication channel between the transmitter and the receiver is open, which greatly complicates the analysis of radio signal propagation in the territory of the designed network. What's even worse is that neighboring wireless equipment can have a negative impact on your network through this "open" channel. Therefore, radio survey of the territory plays a very important role in the design of a Wi-Fi network. Some experts claim that radio inspection is a completely unnecessary stage, citing the fact that surrounding networks are also constantly appearing, developing, modernizing, moving, etc. But you must agree, it’s better to know in advance that there is a gigantic network of points living near you access of a neighboring office, and take appropriate measures (for example, move to other non-overlapping frequency channels), rather than later encounter problems with radio wave interference and, as a consequence, low throughput of your “open” communication channel.

Today there is a sufficient amount of software that allows you to assess the level of the surrounding electromagnetic background in the 2.4/5 GHz ranges. This article discusses programs that run under Windows OS.

1. Acrylic Wi-Fi

Acrylic Wi-Fi is the newest free network scanner that displays available wireless networks, their technical characteristics (protocol, channel, maximum speed, etc.) as well as information about their level of protection. The program even provides a list of Wi-Fi passwords that are used by default access points.

Acrylic has a paid professional version with advanced capabilities to detect wireless security issues. Also in this version, the program performs a radio survey of the territory and offers to select the optimal channels on the network to ensure the most correct operation. The appearance of the program is shown in Figure 1:

Figure 1 - Appearance of the Acrylic Wi-Fi program

In the free version of the program, its capabilities remain rather meager, limited to the output of the information shown in the screenshot above (Figure 1), namely: transmitted by the access point - SSID; its MAC address; RSSI - signal strength; Chan - number of the channel used for transmission; 802.11x - Wi-Fi transmission standard; Max Speed ​​- maximum speed; WEP/WPA/PWA2 - encryption type. An excellent feature is that the program shows which access points have WPS 1.0/2.0 mode enabled, because it’s no secret that this WPS 1.0 has long been a kind of “back door” for any network. It also displays related information about the manufacturer (Vendor) and the type of network in which the access point operates (Type), or in other words: does it have access to the Internet, or there is no point in breaking it (just kidding). For added drama, a graph is displayed showing changes in signal strength from various access points over time (bottom right in Figure 1).

In general, the free version of Acrylic Wi-Fi is limited to the listed set of functions. Quite meager, considering that long before this program, software appeared that was capable of more.

It’s hard to find fault with the professional version of the program; quite a lot of useful functions have been crammed into it, for example, the program itself will indicate access points that negatively affect your network. Acrylic allows you to generate reports on the status of Wi-Fi networks with detailed characteristics of access points and transfer them to a communicator or administrator’s computer.

Resume on Acrylic Wi-Fi: When working with this program, I got the feeling that it was made entirely on the Kali Linux platform, with the only difference being that the graphical shell was added for working under Windows. The paid version is complemented by the fact that it allows you to generate reports in HTML format and helps the user make decisions about setting up the network without going into technical nuances. Thus, I would rate the free version of the program three points on a five-point scale; it can be classified as software for “beginners”; the paid version of the program deserves a slightly higher rating of three plus (due to the generation of reports). However, overall the program remains weak in its technical capabilities. In addition, it contains a bunch of distracting links leading to the developer’s website and profiles on google+, Facebook, twitter, etc. Which overall creates the impression not of a technical application, but of a program for entertainment, when, out of nothing to do, I decided to “monitor” my neighbors’ Wi-Fi access points.

2. Wi-Fi Scanner

This software can show detailed information about 802.11 a/b/g/n/ac networks near you, as well as access point parameters and signal strength. The program also has a paid and free version, unlike the previous software, they do not differ in functionality. After installing the program, you can use it for 30 days, after which you need to register it - free for personal use, or buy it in case of commercial use of the software. The appearance of the program is shown in Figure 2.


Figure 2 - Appearance of the Wi-Fi Scanner program

As in the previous software, the main column displays information about available networks, but the information is more extensive. Availability of additional columns: Achievable rate - actually achievable data transfer rate, Channel Width - used channel width, Spatial stream - spatial streams (here we are talking about MIMO technology), Channel Utilization - how loaded the data transmission channel is, and more extensive information about the security protocols used , and specifically the encryption type: CCMP/TKIP/WEP/ or a combination thereof.

The free version of this program offers all the features listed in the professional version of Acrylic Wi-Fi. In particular: Figure 3 shows a graph of the signal level from available Wi-Fi networks. Very convenient and intuitive.


Figure 3

Figure 4 provides extended information about one of the surrounding networks. In this case, this network is of the same name Rostelecom.


Figure 4

Resume on WiFi Scanner: In my opinion, the design of this program is quite “easy” in terms of perception of the displayed information, and the location of all buttons and tabs is intuitive. This program is an excellent solution for private use, and for commercial use the prices are reasonable. The program deserves an excellent rating.

3.Homedale

Belongs to the "weak" class. From a technical point of view, the program has glitches and shortcomings, but it works on the latest versions of Windows. The program is easy to use, but it only allows you to evaluate the signal level coming from the access point and some information already listed in previous software products. The program does not see equipment manufacturers and does not always determine the model of the access point whose network it has detected. Moreover, the signal strength from the access point is also not always able to be determined. The appearance of the main program window is shown in Figure 5.


Figure 5

The program does not provide filters in any way, therefore, for example, on the graph of the power distribution of available access points by channel, it is impossible to remove connections that are “uninteresting” for us, so it simply shows such uninformative stuffing (Figure 6):


Figure 6

Considering the incomplete performance of this program, it is rated, to put it mildly, “unsatisfactory.” The program is quite weak compared to other similar free software distributed throughout the Internet.

4. Outdated monitoring programs

The list of outdated programs includes those that either do not support “modern” Wi-Fi standards - IEEE 802.11n/ac, or no longer work under Windows 7/8/8.1/10. And the appearance of these programs is quite depressing, which is not pleasing to the eye.

Network Stumbler is a lightweight wireless network monitoring tool for Windows. Its development stopped at supporting 802.11 a/b/g standards, that is, it monitors the network only in the 2.4 band, excluding five gigahertz. The software works on Microsoft Windows systems up to and including XP.

WirelessNetView was once an excellent tool for monitoring Wi-Fi networks, but is now somewhat outdated.

Wireless Network Watcher - originally created for detecting and analyzing Wi-Fi networks. I used it myself once; the utility scanned local networks, including wireless ones. The program displays a list of all devices currently connected to the scanned network. The device information output table displays information such as: IP, MAC address, device name and adapter manufacturer. The list can be exported to HTML. On the issue of analyzing Wi-Fi networks, her attitude is rather mediocre, because in order to get information about a Wi-Fi network, you need to connect to it. In fact, it was included in this review simply because of its specific name.

Instead of a conclusion

The Acrylic Wi-Fi and Wi-Fi Scanner programs listed above belong to the class of those free programs that keep up with the times and are capable of monitoring access points running on the relatively recently introduced IEEE 802.11ac. In addition to the programs reviewed, there are also no less famous ones that were not included in this review, among which inSSIDer is an entirely paid software recently. In addition, a large number of programs running Android OS, Mac OS and Linux are available on the network. But that is another story.

Today there is a router in almost every home. But such an abundance of Wi-Fi routers could not but affect the quality of the signal.

Very often networks overlap one another and interruptions in the Internet signal occur. And this despite the fact that he is strong and nothing visible should interfere with him.

The reason may just be the overlap of several access points on one channel. For apartment buildings this problem is especially relevant. Only the user should distinguish between problems with the signal and the router. This is how a smartphone on the Android platform completely freezes at the stage of downloading torrent files. Here the reason is different.

Wi-Fi breaks can occur as follows:

  1. A tablet or smartphone behaves as it wants - when it connects normally to the network signal, when it doesn’t connect at all;
  2. A sharp drop in download speed without good reason (and low speed is also observed on internal resources);
  3. Communication is lost in a certain place in the apartment, where there are no barriers.

The reason for all these troubles is precisely the use of the same communication channel by many points of wireless routers. Subsequently, congestion of this channel leads to low speed and connection interruptions.

Solving a problem quickly means changing the channel. Most users don’t even know how to analyze this situation and how to change the “Auto” setting on their router.

You can read about how to change the communication channel on different types of routers at this link.

Free programs that can be easily downloaded on the Internet will help you analyze the state of your wireless network for:

  • smartphones with different platforms;
  • laptops and PCs.

There are thirteen channels in total for signal transmission in Russia. So out of these 13 channels the first, sixth and eleventh do not intersect. But not all countries use 13; in the USA, for example, only 12 are allowed. For different versions operating system There are specific features regarding the use of certain channels.

So Windows 10 does not see channel 13, and in the router settings it is impossible to change the region to Europe in order to correct access to this channel.

Version 7 of the OS also does not see channels larger than 12. Therefore, when choosing another unloaded channel, this must be taken into account.

This is exactly what analyzer programs are needed to identify free channels, configure the router on them and work calmly.

If the user has a problem connecting to any channel or the signal lags due to channel congestion, then you can ask the technical support of the official Windows website for answers to your questions.

The most convenient and simple programs that analyze the occupancy of communication channels are the following:

  1. inSSIDer 4 - download;
  2. Free Wi-Fi Scanner - download;

These programs will help you learn other useful information about networks. You can recognize the type of security and signal speed. Convenient graphs help you analyze the signal. The figure below shows how different users overlap on the channels and which access point has the highest frequency signal.

An example of network analysis using InnSider

When downloading the program from the official website, the user should pay attention to the terms of use. Very often today they offer only demo versions of programs with a period of use of no more than a month. after that you need to buy the program.

As can be seen from the picture, after analysis it is clearly seen that the most crowded channel is 6. That is, you should disconnect from it and select free 2, 3, or 4, or any other except the first and eleventh, which are also already occupied.

Network analyzer for Android

Most convenient for smartphone on the Android platform, use the Wi-Fi Analyzer program. No problems searching or downloading. The user goes to the Google Play service through his phone and finds this application through a search and downloads it. When the smartphone is turned on, you can download the application via a PC.

After installation, you can go into the program and analyze communication channels. It will be immediately visible at what frequency the router operates and on what channel. All this will be indicated on the available charts. Just select channels and properties in the settings.

That is, in the illustrative example there is no need to change anything, because the signal does not intersect with almost anyone. In the same program, you can select the “channels” tab in the properties and see which channel has the highest and best signal. The rating is indicated by stars.

The example shows that the best signal without interference is on channels 12, 13 and 14. The program installs quickly and erases quickly. Therefore, users should not be afraid that the application will take up a lot of memory on the device.

There is another convenient tab in the same application that will show the signal frequency. With such a pointer, you can move around the apartment and choose exactly the place where the signal will be the strongest.

How to change automatic channel selection on a D-Link router?

There are a huge number of routers on the market today. But according to statistics, the most frequently purchased model is the D-Link model. How can I disable auto channel selection on it?

To do this, type in the Internet address bar address 192.168.0.1. In the window that opens, type admin in both login and password. Unless the user himself changed them. The standard login and password are always written on the back cover of the router box.

A window appears, in which you select “advanced settings”, and then the basic ones, as in the figure above. After selecting the basic properties of the wireless network, you should find the “channel” line in the window that appears and select from it the free channel that any program for analyzing communication channels showed.

After this, the connection may be interrupted briefly and restarted again. If this does not happen, you need to check the router settings again and if there is a dialog box in the upper right corner asking you to save changes, you need to click and save it.

After this, the data transfer and download speed should increase.

With the help of such simple manipulations, any user today can correct minor errors in the wireless network in their apartment without calling a technician or paying for their services. So,

  1. Launch the analyzer program;
  2. Determine a free channel;
  3. Find the place in the apartment with the highest reception frequency
  4. Check non-overlapping channels (1,6,11 - if they are free) at this frequency, for example, reception speed and jumps;
  5. Install the selected free channel with a high reception frequency - reconfigure the router, accept the changes.

Thus, fixing problems with lost signal and lost speed turned out to be very simple, you just need to strictly follow the above steps.

Today there is a router in almost every home. But such an abundance of Wi-Fi routers could not but affect the quality of the signal. Very often networks overlap one another and interruptions in the Internet signal occur. And this despite the fact that he is strong and nothing visible should interfere with him.

The reason may just be the overlap of several access points on one channel. For apartment buildings this problem is especially relevant. Only the user should distinguish between problems with the signal and the router. This is how a smartphone on the Android platform completely freezes at the stage of downloading torrent files. Here the reason is different.

Wi-Fi breaks can occur as follows:

  1. A tablet or smartphone behaves as it wants - when it connects normally to the network signal, when it doesn’t connect at all;
  2. A sharp drop in download speed without good reason (and low speed is also observed on internal resources);
  3. Communication is lost in a certain place in the apartment, where there are no barriers.

The reason for all these troubles is precisely the use of the same communication channel by many points of wireless routers. Subsequently, congestion of this channel leads to low speed and connection interruptions.

To quickly solve a problem means changing the channel. Most users don’t even know how to analyze this situation and how to change the “Auto” setting on their router.

You can read about how to change the communication channel on different types of routers at this link.

Changing automatic network channel selection on an Asus router

Analyzer programs for computers running Windows 7, 8 and 10

Free programs that can be easily downloaded on the Internet will help you analyze the state of your wireless network for:

  • smartphones with different platforms;
  • laptops and PCs.

There are thirteen channels in total for signal transmission in Russia. So out of these 13 channels the first, sixth and eleventh do not intersect. But not all countries use 13; in the USA, for example, only 12 are allowed. Different versions of the operating system have their own characteristics regarding the use of certain channels.

Schematic representation of overlapping channels

So Windows 10 does not see channel 13, and in the router settings it is impossible to change the region to Europe in order to correct access to this channel.

Version 7 of the OS also does not see channels larger than 12. Therefore, when choosing another unloaded channel, this must be taken into account.

This is exactly what analyzer programs are needed to identify free channels, configure the router on them and work calmly.

If the user has a problem connecting to any channel or the signal lags due to channel congestion, then the answers to your questions can be asked to the technical support of the official Windows website.

The most convenient and simple programs that analyze the occupancy of communication channels are the following:

  1. inSSIDer 4 - download;
  2. Free Wi-Fi Scanner - download;

These programs will help you learn other useful information about networks. You can recognize the type of security and signal speed. Convenient graphs help you analyze the signal. The figure below shows how different users overlap on the channels and which access point has the highest frequency signal.

Wireless network channel analysis with overlay graphs

An example of network analysis using InnSider

When downloading the program from the official website, the user should pay attention to the terms of use. Very often today they offer only demo versions of programs with a period of use of no more than a month. after that you need to buy the program.

Analysis of channel fullness

As can be seen from the picture, after analysis it is clearly seen that the most crowded channel is 6. That is, you should disconnect from it and select free 2, 3, or 4, or any other except the first and eleventh, which are also already occupied.

Network analyzer for Android

Most convenient for smartphone on the Android platform, use the Wi-Fi Analyzer program. No problems searching or downloading. The user goes to the Google Play service through his phone and finds this application through a search and downloads it. When the smartphone is turned on, you can download the application via a PC.

Downloading a program from Google Play

After installation, you can go into the program and analyze communication channels. It will be immediately visible at what frequency the router operates and on what channel. All this will be indicated on the available charts. Just select channels and properties in the settings.

Asta operates on frequency 50 and the signal is received on channels 8-10

That is, in the illustrative example there is no need to change anything, because the signal does not intersect with almost anyone. In the same program, you can select the “channels” tab in the properties and see which channel has the highest and best signal. The rating is indicated by stars.

The example shows that the best signal without interference is on channels 12, 13 and 14. The program installs quickly and erases quickly. Therefore, users should not be afraid that the application will take up a lot of memory on the device.

There is another convenient tab in the same application that will show the signal frequency. With such a pointer, you can move around the apartment and choose exactly the place where the signal will be the strongest.

Signal Strength Measurement Indicator

How to change automatic channel selection on a D-Link router?

There are a huge number of routers on the market today. But according to statistics, the most frequently purchased model is the D-Link model. How can I disable auto channel selection on it?

To do this, type in the Internet address bar address 192.168.0.1. In the window that opens, type admin in both login and password. Unless the user himself changed them. The standard login and password are always written on the back cover of the router box.

Changing Wireless Network Settings

A window appears, in which you select “advanced settings”, and then the basic ones, as in the figure above. After selecting the basic properties of the wireless network, you should find the “channel” line in the window that appears and select from it the free channel that any program for analyzing communication channels showed.

Selecting and saving a new communication channel

After this, the connection may be interrupted briefly and restarted again. If this does not happen, you need to check the router settings again and if there is a dialog box in the upper right corner asking you to save changes, you need to click and save it.

After this, the data transfer and download speed should increase.

With the help of such simple manipulations, any user today can correct minor errors in the wireless network in their apartment without calling a technician or paying for their services. So,

  1. Launch the analyzer program;
  2. Determine a free channel;
  3. Find the place in the apartment with the highest reception frequency
  4. Check non-overlapping channels (1,6,11 - if they are free) at this frequency, for example, reception speed and jumps;
  5. Install the selected free channel with a high reception frequency - reconfigure the router, accept the changes.

Thus, fixing problems with lost signal and lost speed turned out to be very simple, you just need to strictly follow the above steps.

Troubleshooting a wireless network can be risky. Thanks to Wi-Fi analyzers for Windows 10, you can detect rogue access points and perform site surveys, among others. If you manage a wireless network, then you know that it is just as important as the organization's other assets. For this reason, at the very least, it is important to keep an arsenal of tools at your disposal for troubleshooting Wi-Fi networks.

Best Wi-Fi Analyzers for PC

NetStumbler

Another free Wi-Fi analyzer is Wireshark, which boasts a huge user community as well as fast updates. While it's best known for Ethernet analysis, Wireshark also supports 802.11 and helps troubleshoot wireless network issues and block security configurations.

Acrylic

NetSpot WiFi is among the popular Wi-Fi scanners for network management and troubleshooting. Originally available on Mac, this tool has recently arrived on the Windows platform with support for WiFi 802.11 a/b/g/n/ac.

The tool allows you to track and manage all SSIDs associated with your network with ease. It displays all operational channels that connect to an SSID, as well as all SSIDs that communicate with each other. It also works to control signal strength.

NetSpot also detects and eliminates vulnerable access points, detects rogue workstations, avoids cross-channel interference, and gets rid of false positive intrusion alerts. You can also check the security settings (Open, WEP, WPA/WPA2 Personal/Enterprise), non-transferable SSID and Wi-Fi signal strength using the tool.

Peculiarities

  • Quickly export active visualization to PDF
  • Quick saving heat maps as PNG
  • Enterprise-wide, customizable report builder
  • It is not necessary to export only the tested part of the map
  • Importing and Exporting BSSID Aliases
  • Sharing survey data
  • All survey data can be exported to CSV
  • Configurable detection proximity for access points
  • Customizable access point indicators with specific levels of detail
  • Automatic predictive multi-pole AP positioning
  • Multi-dimensional and custom SSID/BSSID grouping
  • Setting guess range based on area type
  • Easily see how much area your survey actually covers and where you need to take additional measurements
  • Basic graphic editor for quick area maps
  • Report 2.4 and 5 GHz separately, AP by AP coverage
  • Non-transferable SSID support
  • Autosave project
  • Shared settings to make it easier to manage multiple copies of NetSpot

Tool

Wi-Fi Analyzer includes three tabs namely Connected, Analysis and Networks. Connected provides information about the current WiFi connection. It displays a graphic of connection quality based on link speed and signal strength in negative dBm at the top of the window. Additionally, there are icons that indicate poor link speeds, weak link, poor connection, no internet connection, and unsecured connections.

The Analysis page allows you to make changes to improve the strength of the connection. It provides access to channel charts and ratings, allows you to switch between channels, and allows you to switch between frequency bands. It also provides full access to customize graphics colors and SSID/MAC. It is also possible to filter the SSIDs shown in the graph according to signal bands, frequency band, overlap, WiFi method and network type.

The Network tab contains a list of all available SSIDs. It allows you to filter available connections according to their name and signal.

It's no secret that Wi-Fi networks are quite susceptible to interference, and walls and other objects may be encountered along the path of the wireless signal, and after the next such obstacle, the electromagnetic wave may simply not fulfill its purpose. In the age of digital technology, you can visualize anything, even how Wi-Fi signals invisible to the human eye propagate.

When there is a tool that allows you to visually show the signal level immediately on an area map, this makes it much easier to perceive the picture of the network as a whole. Such tools allow you to immediately download a building plan, and by walking through it with the Wi-Fi receiver turned on, you can get heat maps of radio coverage and many other useful data:

The screenshot above was taken in the Acrylic Wi-Fi program (for Windows OS), which allows you to build heat maps using data from Google Map, but there are equally effective software products for mobile devices. Most Windows-based Wi-Fi coverage analysis tools offer a large amount of functionality. By the way, we reviewed some of them, distributed free of charge or shareware (demo version and/or with reduced functionality). But if you don't need all the features of advanced Windows applications with identifying sources of interference or better visualization, then Android-based software can help solve a number of important problems.

Wi-Fi coverage analyzer applications on Google Play are not uncommon; there are quite a large number of them there, but when choosing an application we were guided by several factors: free distribution, the ability to build heat maps and the presence of unusual functionality (something more than just channel monitoring). As a result, the list of dozens of applications was reduced to 4. The review included such programs as: Wi-Fi Analyzer and Surveyor, Wi-Fi Visualizer, iMapper Wi-Fi Pro, and WiTuners Mobile:

All four software products can be downloaded and installed for free.

Wi-Fi Analyzer and Surveyor

Using this Wi-Fi analyzer as an example, we will consider the principle of operation of the application in more detail; for other software products, we will omit some step-by-step configuration items and move directly to analyzing the capabilities.

ManageEngine's Wi-Fi Analyzer and Surveyor app has very simple features and is completely free. The program doesn't even have an extended paid version. The installer weighs about 6 MB. When you open the app, after setting it up for the first time, you can go to the Analyzer or Surveyor page. At the same time, in the Analyzer mode, Wi-Fi networks that your device sees are monitored, and in Surveyor you can add a floor plan from the memory of your device or cloud storage:

After the room map has been added, the application invites you to “walk” through the building and measure the radio coverage at the points where you are; this is done by long pressing on the monitor screen of your smartphone. After you have gone through all the control points, you can complete the “survey” of the territory and display a report by clicking the “End Survey” button. Moreover, if you are taking measurements and a Wi-Fi signal is not detected at a certain point, you will receive a corresponding notification from the program:

The description of the program states that you can photograph the floor plan and load it into the program for further work with it. Let's add a little ambience and see what happens. As initial data, we will select an evacuation plan from a building code-named “Pentagon”, photographed, as indicated in the program description, on the same smartphone:

In the "Surveyor" tab, click "Add Plan" and upload the photo you took directly from the photo gallery. Next, we move to the desired point on the map and click on the smartphone screen, information about the level of the recorded Wi-Fi signal appears on the map. Of course, the good news is that the application remembers the signal level from all available APs at the measured points. The screenshots below show signal levels at measured points for three randomly selected networks:

Please note that the same number of measurements was taken in all three screenshots, but depending on which network you select in the drop-down menu (in our example, these are dlink, uraldelo, WiFi-DOM.ru networks), the signal levels of a specific network are displayed on the map . If the smartphone was unable to detect one of these networks at the measuring points, then it, accordingly, will not be displayed on the map.

Unfortunately, you won’t be able to select an individual access point to see its range; you can only select its SSID. The difference is that if several access points use the same SSID, then the application cannot determine whether different equipment creates such a coverage area or one. The application also allows you to display data with a heat map effect, and not only give a report on the signal level at a specified point:

Let's face it, the effect is so-so... There was an assumption that to create a full-fledged heat map, you need to make a fairly large number of measurements, but this idea was not crowned with success:

The HeatMap Report effect only radiates slightly beyond the original size of the dots you see in the Signal Strength report, so in reality you just see blurry dots. As we'll see below, all other Wi-Fi coverage analysis software tools use specific prediction algorithms to fill these gaps and create a more complete heat map without having to walk through every square meter of the building. Therefore, in terms of creating heat maps, the Wi-Fi Analyzer and Surveyor program is not very convenient.

Let's stay a little longer on this program and say a few words about the "Analyzer" tool of the application in question. Here you can find 4 tabs at the bottom of the screen, each of which contains trivial data that is available in almost every similar application:


The "Channel" tab displays information about available access points (APs) and the channels on which they operate in the form of bar graphs. Next are the “Interference” and “Signal” tabs, which provide the same information as before (in the “Channel” tab), but directly on the subject of interference and signal level from each access point (so to speak, for more convenient perception):

Here you can choose which access points to display based on signal strength information (Best, Good, Weak, or Show All). And the last tab - “Wi-Fi Details” (or information about Wi-Fi) shows a text list of available points and basic information about them: SSID, MAC addresses, signal strength, channel used for data transfer. Unfortunately, there is no information about the network encryption algorithm used.

In the analyzer settings, you can set the scanning interval or disable it altogether, which can be useful if you just need to access previously taken measurements. In addition, in the program you can give any network a name you come up with, which will help you track these networks in the future. These simple settings can help when working with specific networks on a regular basis.

Wi-Fi Visualizer

ITO Akihiro's Wi-Fi Visualizer is also free and provides very simple heatmap functionality as well as several other useful tools.

Once you open Wi-Fi Visualizer, you'll see a "Scan" screen that displays information about your current connection to your Wi-Fi access point. Along with the status of the wireless network, it also shows the channel width, center channel and maximum data transfer rate (however, the program cannot always determine all these parameters):

You can also view tabs on the same page to see channel occupancy and graphical representations for the 2.4 GHz bands and for each subset of the 5 GHz bands, but it would be more convenient to see all 5 GHz bands on one page:

Also, on the scanning page there is a tab with a list of available SSIDs. You can't filter the list, but you can sort devices by SSID and BSSID. On the same “Scan” page, it is possible to save a list of devices and graphics with information and channel status, which you can return to and view later. This is a rather convenient feature that not all free applications offer:

This is where the scanning functions end, and we can move on to considering heat maps - the corresponding “Heatmap” tab:

On the "Heatmap" page you can name and create a new project. When you add a floor plan (this can be a simple picture), just like in the previous program, you indicate your location on the map, the program registers the access point and stores its data transfer speed and power at the specified point. Unfortunately, unlike the application discussed earlier, the program registers statistics only for the AP to which you are currently connected. This is not very convenient and can be a problem if you want to see whether signals from one point affect another on a heat map. It is simply impossible to do this in this program. But thanks to the adaptive signal level prediction algorithm, it is possible to build more uniform heat maps:

Let's move on to the no less interesting "Network Map" tab (below under "Heatmap"). Here on the screen you can view a tree of devices detected on the network. In fact, it is a simple IP scanner that shows the IP, MAC addresses and network names of devices on the network (such as routers/switches/wireless APs) in addition to client devices. This is a great bonus feature that is not seen in most other Wi-Fi network analysis applications:


On the "Chart of Signal Strength" tab, you can view a graph of signal strength changes over time (data shown for the access point to which you are connected). Although this feature is very simple, it is also very convenient. The graph shows a static line indicating a typical roaming boundary line at -80 dBm. You can, moving away from the access point, understand at what distance from it the specified attenuation of -80 dBm will be observed and then take this into account when organizing seamless radio coverage:


The Settings tab provides information about the characteristics of your device: supported frequencies and maximum data transfer speed.

Thus, if you need a good tool for analyzing radio coverage and Wi-Fi networks in general, this application is worth adding to your arsenal. Such solutions are well suited for analyzing small wireless networks, especially if you are the only system administrator in your company. With its help, you can carry out express analysis when designing or expanding an existing Wi-Fi network.

Instead of a conclusion

In this part of the article, we looked at the work of two of the four promised applications. In the second part, we will look at the work of two more software solutions with no less interesting capabilities that allow you to analyze radio coverage - iMapper Wi-Fi Pro and WiTuners Mobile.