Best Free WiFi Site Survey Software
Free WiFi survey tools range from proper floor-plan heatmaps to simple signal mappers. NetSpot is the strongest all-around starting point, though Android users have two compelling no-cost alternatives.
NetSpot
9.1/10Best for: Home users or small IT teams that want floor-plan surveys without learning a dense RF toolkit
- Available on Windows, macOS, Android, plus iOS
- Floor-plan workflow is approachable for occasional surveys
- Nearby-network analysis helps explain channel congestion
- Projects can support repeat measurements after router changes
NetLens
8.8/10Best for: Android users who need unlimited local surveys plus export tools without creating an account
- Unlimited surveys in the free version
- PDF, PNG, plus CSV export included
- No account required
- Floor-plan mode works without ARCore
ManageEngine WiFi Analyzer and Surveyor
8.3/10Best for: Android users who want a heatmap beside channel interference plus signal graphs
- Free Android site survey mode
- Custom floor plans supported
- Heatmap plus signal reports can be exported
- Channel interference views add useful context
Free WiFi Site Survey Software Compared
The five tools below are compared by whether they create true floor-plan heatmaps, which devices they support, plus the real cost of the usable free entry point. Scores reflect editorial judgment based on survey depth, restrictions, usability, plus practical fit. They are not lab accuracy ratings.
| Tool | Floor-Plan Heatmaps | Main Platform | Price | Score |
|---|---|---|---|---|
| 1.NetSpot PICK | ● Yes | Desktop + mobile | Free | 9.1/10 |
| 2.NetLens | ● Yes | Android | Free | 8.8/10 |
| 3.ManageEngine WiFi Analyzer and Surveyor | ● Yes | Android | Free | 8.3/10 |
| 4.Ubiquiti WiFiman | ● Yes | iOS + Android | Free | 7.9/10 |
| 5.Acrylic Wi-Fi Heatmaps | ● Yes | Windows | Free trial | 7.6/10 |
The 5 Best Free WiFi Site Survey Tools, Reviewed
01 NetSpot
Windows, macOS, Android, iOS / Etwok
9.1/10
NetSpot
Windows, macOS, Android, iOS / Etwok
NetSpot gave us the most complete free starting point in this group. The desktop app combines nearby-network discovery with floor-plan survey work, so you can investigate a weak room rather than merely watch its signal number change. Our review workflow covered a 12-point residential floor plan, with the project setup proving easier to follow than the more technical Windows alternatives.
The catch is platform-specific licensing. Free features differ across Windows, macOS, Android, plus iOS, while some mobile heatmap functions require NetSpot Plus. Check the edition on the device you intend to carry before mapping a large property. Even with that wrinkle, NetSpot has the best balance of usability, desktop support, survey structure, plus useful diagnostics.
Best forHome users or small IT teams that want floor-plan surveys without learning a dense RF toolkit
- Available on Windows, macOS, Android, plus iOS
- Floor-plan workflow is approachable for occasional surveys
- Nearby-network analysis helps explain channel congestion
- Projects can support repeat measurements after router changes
- Free desktop download offers a practical entry point
- Free capabilities differ by operating system
- Some mobile survey visualizations require an in-app purchase
- Advanced reporting sits outside the basic free workflow
02 NetLens
Android / Independent Developer
8.8/10
NetLens
Android / Independent Developer
NetLens is the least compromised free option here. It supports imported floor plans, manual measurement points, plus camera-assisted mapping on compatible phones. During our workflow review, a new survey could be started without an account, cloud workspace, or license screen.
The app keeps unwalked areas blank instead of filling them with overly confident coverage estimates. That makes sparse surveys look less impressive, yet it also makes missing data easy to spot. The $0 tier permits unlimited captures plus all listed export formats, with ads in browsing screens plus a watermark on image or PDF exports.
Best forAndroid users who need unlimited local surveys plus export tools without creating an account
- Unlimited surveys in the free version
- PDF, PNG, plus CSV export included
- No account required
- Floor-plan mode works without ARCore
- Survey data remains on the Android device
- Android 13 or newer is required
- Free exports carry a watermark
- Newer app with a smaller support footprint
03 ManageEngine WiFi Analyzer and Surveyor
Android / Zoho Corporation
8.3/10
ManageEngine WiFi Analyzer and Surveyor
Android / Zoho Corporation
ManageEngine packs more troubleshooting views around its survey tool than most no-cost phone apps. You can upload a floor plan, record readings at selected positions, then export either a heatmap or signal-strength report. Its channel graphs are useful when weak performance comes from congestion rather than distance.
The interface feels closer to a network utility than a polished mapping app. Still, the app completed the core floor plan → measurement points → heatmap report sequence without introducing a paid survey tier. It is a good second opinion when a coverage map looks fine but one channel remains crowded.
Best forAndroid users who want a heatmap beside channel interference plus signal graphs
- Free Android site survey mode
- Custom floor plans supported
- Heatmap plus signal reports can be exported
- Channel interference views add useful context
- No advertising in the analyzer
- Android only
- Interface feels dated in a few screens
- Not intended for predictive access-point design
04 Ubiquiti WiFiman
iOS, Android / Ubiquiti
7.9/10
Ubiquiti WiFiman
iOS, Android / Ubiquiti
WiFiman is free, clean, plus especially helpful inside a UniFi setup. Its mobile Signal tab can show signal strength, throughput, latency, plus roaming behavior. On supported LiDAR-equipped devices, Floorplan Mapper records signal conditions while you move through the building.
It is less universal than NetSpot or NetLens. Several useful details depend on UniFi network hardware, while the desktop app does not include the mobile survey functions. Treat it as a focused UniFi validation tool, not a neutral survey package for comparing every visible access point.
Best forUniFi owners who want quick roaming, latency, throughput, plus connected-signal checks
- Free with no advertising
- Strong fit for existing UniFi networks
- Tracks latency plus throughput during checks
- Floorplan Mapper supports quick coverage visualization
- Simple device discovery plus speed testing
- Best features favor UniFi hardware
- Desktop version lacks mobile signal tools
- Not ideal for vendor-neutral multi-AP surveys
05 Acrylic Wi-Fi Heatmaps
Windows / Tarlogic
7.6/10
Acrylic Wi-Fi Heatmaps
Windows / Tarlogic
Acrylic Wi-Fi Heatmaps is not permanently free, so it belongs lower on this list. Its 15-day evaluation is still useful for a one-off technical assessment or a serious comparison before buying professional software. It supports floor plans, active or passive surveys, predictive design, multiple heatmap types, plus report generation.
The learning curve is steeper than the phone apps, partly because there is more RF detail to configure. Trial output also carries watermarks, while the evaluation license is not meant for professional or commercial work. Use it to test a demanding Windows workflow, not as a long-term free solution.
Best forWindows technicians evaluating active surveys, predictive planning, or formal client reports
- Professional-grade Windows survey workflow
- Active plus passive survey support
- Predictive network planning included
- Broad selection of RF visualizations
- Editable reporting available for evaluation
- Free access expires after 15 days
- Trial output is watermarked
- Evaluation license excludes commercial use
How We Evaluated Free WiFi Site Survey Software
We checked whether each tool could move through the essential survey sequence: add or create a floor plan, calibrate the space where supported, record readings at repeatable positions, view the resulting coverage map, then save or export useful results. We also reviewed current platform availability, free-tier restrictions, hardware dependencies, account requirements, plus whether the free offer was permanent or merely an evaluation.
Scores favor tools that a home user or small IT team can keep using after the first map. We did not assign recovery-style percentages or pretend phone radios produce identical readings. WiFi measurements vary by device, antenna orientation, client chipset, background scanning, plus nearby activity.
How to Choose Free WiFi Site Survey Software for Your Property
Start with the device you will actually carry. A Windows laptop sees the network through a different radio than an Android phone, so choose the client type that resembles the devices having trouble. For a home dead-zone check, signal-strength heatmaps are usually enough. Offices with voice calls or roaming clients also need latency, throughput, channel use, plus repeatable walk paths.
Check what “free” means before drawing a large floor plan. Some apps keep every capture feature free but watermark exports. Others allow scanning at no cost while reserving heatmaps for a paid tier. A time-limited trial can be useful for one diagnostic weekend, though it is a poor choice for quarterly surveys.
Common WiFi Site Survey Mistakes That Distort Heatmaps
Do not survey immediately after changing router settings. Give access points plus clients time to reconnect, then walk at a normal pace while holding the device in a consistent position. Avoid covering the phone or laptop antenna with your body. Take more points near thick walls, stairwells, metal shelving, elevators, plus room corners.
A bright coverage map does not prove that the network is fast. Signal strength can look healthy while interference, overloaded backhaul, slow internet service, or poor roaming causes the real problem. Pair the heatmap with a throughput or latency test, then repeat the survey at a busy time of day.
Which Free WiFi Site Survey Tool Should You Use?
NetSpot earns first place because it covers the broadest mix of desktop access, floor-plan projects, plus nearby-network troubleshooting without burying a home user in RF jargon. Pick NetLens if you use a recent Android phone plus want unlimited exports, or ManageEngine if channel interference matters as much as coverage. WiFiman makes more sense inside UniFi, while Acrylic is a temporary route into professional Windows surveying.Map the same room twice from the same measurement points, then investigate any result that changes by more than roughly 5 dB before moving an access point.