Links:

Android Market direct link

Click on or scan this barcode from your Android device to install this program.

Introduction

I am reviewing WiFi Analyzer which is an elementary wireless-network site-survey tool for the Android platform. This program is free-to-download but is ad-supported with ads that can be suppressed for a few weeks at a time through a user option. There is also the ability for users to donate via PayPal to keep the program being developed.

Like all other WiFi site-survey tools, this program relies on the “beacon” information sent out by wireless networks at regular information and a low-traffic wireless network may occasionally show up on the program’s radar whereas a regularly-used network will exist on the program’s radar.

Data views

This program has a few different methods of visualising the wireless-network space that your Android device as listed below.

There is a Channel graph which, like inSSIDer, can show the relative strength of each SSID on the Y axis and channel positioning on the X axis. This can be useful for determining whether a wireless network is being swamped out by other networks or determining where to tune the wireless access point’s operating channel to.

Wi-Fi Analyzer Channel Graph

There is also a time graph which shows relative signal strength of access points over a time period. This can be useful for determining what happens when a certain network comes on line for example.

There is also an access-point list which lists each access point that the Android phone can pick up. Here, you are provided with the ESSID, BSSID, channel number and security type (including WPS capability) of each access point and can have this sorted by ESSID, channel,signal strength or security type (“openness”). This list can be grouped by ESSID and security type so you can identify multi-access-point networks. This view may not be accurate if you have multiple wireless routers in an area set to default SSIDs like “linksys” or “dlink” but working on different WEP keys or WPA passphrases.

Wi-Fi Analyzer Network List by ESSID

There is a Channel-rating bar graph which measures channel useability by the number of stars where the more stars that exist, the better the channel is for your network. You can also “set” an access point to this graph so you can compare channels to the one it is tuned to at the moment. Again, this would come in handy for tuning the access point for best operation.

Lastly, there is a Signal strength meter which allows you to measure the signal strength of an access point. This can be useful for locating rogue or interfering access points or simply to determine the coverage of an access point.

Wi-Fi Analyzer signal strength meter

There is the ability for one to connect to a network if the user installs the “WiFi Connector Library” either through the application or by visiting the Android Market. This can allow the user to “lock-on” to a network while monitoring other wireless access points.

It works well as a basic handheld tool for setting up a new wireless router or access point or keeping a small wireless network operating at its best. For businesses who run public wireless hotspots, this program allows them to assess their hotspot’s performance or find rogue access points (fake hotspots / evil-twins).

Usage tests

I had put the program to some usage tests with different wireless networks including my own and a wireless hotspot, This hotspot was a complementary-use service run by a small independently-run cafe whom I have been helping out with concerning its performance and keeping it “business-safe”. Here, I used the signal-strength meter to check that there was proper signal coverage over the public dining room and terrace area of that cafe. I also used the channel-graph view to determine if there are other access points or ad-hoc wireless networks able to be picked up in the cafe. Both of these functions worked well with assessing the hotspot’s coverage and quality-of-service.

As well, I used it in two shopping strips to assess how it and the Samsung Galaxy S Android handset that I was running it on could handle many wireless networks. It is able to identify each SSID and plot it properly on the graph and could cope with me walking into and out of particular access-point coverage ranges.

Limitations and Points of Improvement

For this application, the program could support “whitelisting” of BSSIDs against an ESSID so that one can easily know if the access point that is using your ESSID is really your network. This would work well with managing public networks like wireless hotspots by identifying rogue access points like the aforementioned “fake hotspots”. It can also work well with managing multiple-access-point wireless networks.

A “Pro” version, which would be sold for at an extra cost and wouldn’t have in-app advertising, could provide various extra functions like SSID whitelist management for use in optimising or managing wireless-network activity in particular sites or GPS support for “plotting” network coverage maps or the ability to keep standard log files for use with desktop software.

It is worth noting that this program is restricted to the frequency bands that the smartphone or tablet can cover and this is typically the 2.4GHz platform. At the moment, there aren’t any Android devices that can cover the 5GHz spectrum using their own hardware.

Conclusion

At last this is a program that answers my need for a cost-effective easy-to-use handheld network-survey tool in a popular smartphone platform. It can therefore be a good companion program to the inSSIDer program that I had previously reviewed on this site.

The program is a free download from the MetaGeek Website or other download directories like TuCOWS or CNet. There is another application from this same team that works with a 2.4GHz spectrum analyzer for use in determining interference on this band, but it comes at extra cost.

The installation routine didn’t take long when I installed it on a Dell Studio 15 laptop that was lent to me as a review sample. It could work with the standard Wi-Fi network card that came with this laptop and could therefore work with any Wi-Fi network adaptor that is used with the host computer.

The program provides a “dashboard” with three concurrent views:

• a table which lists the Wi-Fi networks that the program can find with their SSID, BSSID (MAC address) and channel for each detected wireless network.
• a signal-strength / time graph for all of the discovered Wi-Fi networks
• a signal-strength / channel graph for all of the discovered Wi-Fi networks

As far as I am concerned, the highlight of this program is the signal-strength / channel graph which is useful for identifying channel clashes or blank channels that you can tune the wireless access point to.

One of the main limitations is that it doesn’t detect “extended service set” networks nor does it support detection of multi-SSID access points which become a wireless on-ramp for many networks.. This may be of concern when using this program to manage routers with “guest-network” functionality or managing hotspots. Another improvement that I would like to see would be to provide for network grouping by SSID or BSSID (MAC address) so you can identify “foreign” networks easily.This would then help in identifying rogue access points or “evil-twin” hotspots easily.

I would then determine it as being very useful for “tuning” a wireless access point or router so it can coexist with other Wi-Fi networks, either as part of setting one up or troubleshooting a network. I would also recommend it as an essential tool for hotspot owners who want to keep their hotspot networks operating in an optimum manner and providing good customer service. It can also work well in “smoking out” rogue access points or fake “evil-twin” hotspots.