Free Download NetSpot Unlimited Enterprise full version standalone offline installer for Windows it is the only professional app for wireless site surveys Wi-Fi analysis.
Overview of NetSpot Unlimited Enterprise

When working on a Wi-Fi network that provides optimal coverage, you'll need solid research and an understanding of the frequency behavior at the spot. The effective way to obtain this information is a wireless site survey. It will reveal areas of channel interference and dead zones and help you tremendously build a solid network.

The main goal of a WIFI site survey is to determine the feasibility of implementing a wireless network in a specific area and find the best spots for access points and other equipment like cables and antennas. With the help of a site survey, you will know what type of equipment to get and where to install it.
Features of NetSpot Unlimited Enterprise

    Collect live Wi-Fi data from all surrounding networks
    See channel info, transmit rate, vendor, security type, band, etc.
    Customizable signal level and noise charts display changes in real-time
    Discover mode is ideal for locating Wi-Fi issues in a specific area
    Locate your busiest and least occupied channels
    Color-coded dBm bars help quickly analyze all Wi-Fi networks
    Save historical data per each AP for later review
    Too many APs around? Find the needed network fast
    Create multiple zones per project to represent different areas, floors, levels, etc.
    Create any number of snapshots within each zone to quickly compare Wi-Fi configurations
    Automated troubleshooting heatmaps with extensive recommendations
    Simultaneous active and passive surveys can be conducted
    Export your project survey data reports in PDF or CSV