llemonAI WiFi Scanner ← llemonai.in

See your Wi-Fi the way it
actually behaves, not just how it's configured.

A free Wi-Fi scanning and diagnostics tool for Windows and Android. Discover nearby networks, decode raw beacon frames, track signal history, and generate field-ready PDF reports — built for IT engineers and field technicians.

Download See what's inside
Windows 10 (2004+)/11, 64-bit & 32-bit, no installer · Android 8.0 (API 26) and later, single sideloaded APK

Built for real diagnostics, not just a pretty list of networks

Everything a field engineer needs to explain "why is this Wi-Fi bad" with evidence, not guesswork.

📶

Live network scanning

SSID, BSSID, vendor, channel, band, width, RSSI, PHY type, security, and more — refreshed on an adjustable interval.

📡

Beacon frame decoding

Full information-element table per access point — ID, length, raw hex, and human-readable decoding of HT/VHT capabilities, RSN cipher/AKM suites, and more.

📈

Signal history & channel usage

RSSI-vs-time tracking per access point, plus 2.4GHz/5GHz channel occupancy charts to spot congestion and overlap at a glance.

📄

Field-ready PDF export

One-click report with a network summary, per-AP detail pages, decoded beacon tables, host diagnostics, location, ISP, and (Windows) live weather — ready to attach to a ticket. Available on both Windows and Android.

🌐

Network info, on screen

Local IP, gateway, WAN (public) IP, ISP, and GPS location — live, with a Refresh button, on both Windows and Android. Android adds a reverse-geocoded place name too.

📱

Wi-Fi chipset capabilities (Android)

See which Wi-Fi bands and standards your phone's own radio supports — 2.4/5/6/60GHz, WPA3-SAE, Wi-Fi Direct/Aware, and more — plus a real connected-device count per access point where the AP advertises it.

✅

Field engineer checklist

Built-in printable/exportable troubleshooting checklist on both platforms — technician, customer and device details, environmental conditions, RF checks, and throughput verification steps.

🔒

No install, no store required

Windows: a single self-contained .exe, no installer or admin rights needed — run it from a USB stick. Android: a single sideloaded .apk, no Play Store account needed.

See it in action

Live network scan with signal history and full beacon decode, plus per-band channel occupancy — on Windows.

llemonai WiFi Scanner main window showing a live network scan, RSSI signal history chart, and decoded beacon information table
Live scan — network list, signal history, and full beacon decode table
llemonai WiFi Scanner showing a 2.4GHz channel usage bar chart of nearby access points
2.4GHz channel usage — spot congestion and overlapping channels at a glance

...and on Android — same scan/history/channel/checklist views, plus its own Network Info and Wi-Fi Chipset Capabilities cards.

llemonai WiFi Scanner for Android showing the Network Info card (local IP, gateway, WAN IP, ISP, location) and Wi-Fi Chipset Capabilities card
Network Info & Wi-Fi Chipset Capabilities — live on screen, not just in the PDF
llemonai WiFi Scanner for Android showing per-access-point detail: PHY type, max rate, guard interval, connected-device count, and live link speed
Per-AP detail — PHY type, max rate, guard interval, and connected-device count

Field Engineer Checklist

A built-in, printable/exportable checklist — on both Windows and Android — so a site visit covers every factor that affects Wi-Fi performance, not just signal strength. Fill it in on screen, tick items as you verify them, then print (Windows) or share as PDF (Android) a signed record for the ticket.

llemonai WiFi Scanner Field Engineer Checklist showing site and visit details, device information, and environmental condition checkboxes
Technician, customer and device details, environmental conditions, RF checks, and throughput verification — all in one printable page

Download

Windows or Android — pick the build that matches your device. Not sure which Windows build? Almost every PC made since 2010 is 64-bit — use the 64-bit build unless you know otherwise.

New in Windows 15.B4 and Android 15A4, 31 Oct 2026: color-coded Wi-Fi networks based on signal and interference; an M-Lab NDT7 speed test with live results and server selection; local Network Devices discovery (ping-based, limited to a private IPv4 /24, no port scanning); and an AI Companion question progress indicator. Device discovery may miss hosts that block ping; Android may restrict MAC/vendor details.

Version 15.B4 · 31 Oct 2026

llemonai WiFi Scanner — 64-bit

Recommended for almost everyone · Windows 10/11 64-bit
  • Single self-contained .exe (~80 MB)
  • No installation, no admin rights required
  • Works on Windows 10 (build 19041+) and Windows 11
Download for 64-bit Windows
SHA256:
Version 15.B4 · 31 Oct 2026

llemonai WiFi Scanner — 32-bit

For legacy 32-bit Windows installations only
  • Single self-contained .exe (~74 MB)
  • No installation, no admin rights required
  • Works on Windows 10 (build 19041+) and Windows 11, 32-bit edition
Download for 32-bit Windows
SHA256:
Version 15A4 · 31 Oct 2026

llemonai WiFi Scanner — Android

Native app · Android 8.0+ (API 26+)
  • Single .apk (~11 MB), sideload install
  • Signed with our own release key (not on Play Store yet)
  • Wi-Fi scan with signal/interference colors, channels, SNR, PDF reports and AI Companion
  • M-Lab speed test and local network-device discovery
Download for Android
SHA256:

Previous versions

Older builds stay available if you need them. The latest version above is recommended.

VersionReleasedFileSHA256
Windows 15.B3 (64-bit)23 Sep 2026LlemonScanner-15.B3-win-x64.exe4267E8A088A1C7590C08372099F0C9FBDB21BF37158AF754BEB5229F83297C7D
Windows 15.B3 (32-bit)23 Sep 2026LlemonScanner-15.B3-win-x86.exeFF24B74774369853266A4DAC85BDE0C4F0B965FE34ABAE306720AC69B0A7DB61
Android 15A323 Sep 2026llemonai-wifiscanner-15A3-android.apkB17747E352751EB1A44EEA048DB4613D7EB3B2265E8DF4880676D41FD0EE0BC4
Windows 15.B2 (64-bit)22 Sep 2026LlemonScanner-15.B2-win-x64.exeFE29E8F12F15206871B1E073035D1F680DF88D36982AC66D93D3BCE8F51223C8
Windows 15.B2 (32-bit)22 Sep 2026LlemonScanner-15.B2-win-x86.exe4DEDD82509EB1AD2DF962DD7E9A06AF2D862B534F7D60C52E9206CD83C812B40
Android 15A222 Sep 2026llemonai-wifiscanner-15A2-android.apk4FB260160717A11C6F7F4AE10E662565407EC6FEC6BFFD08908A417D1ED13C2C
Windows 15.B1 (64-bit)20 Sep 2026LlemonScanner-15.B1-win-x64.exeA467CBB2198B414DC2B38C93CE0CFF47D2A94A62B2F79EF0B9F849A228A60431
Windows 15.B1 (32-bit)20 Sep 2026LlemonScanner-15.B1-win-x86.exe8A3B84EF335EFE5B91F70317700C41C724DF189B2186A74741B69731832799B3

Verify your download hasn't been tampered with or corrupted: after downloading, run certutil -hashfile LlemonScanner-15.B4-win-x64.exe SHA256 (PowerShell/Command Prompt) and compare the result to the SHA256 value shown above for the file you downloaded.

The Windows 15.B4 executables are not digitally signed. Verify each download with its SHA256 checksum above. Android 15A4 is signed with our release key but is not listed on the Play Store, so Android may still warn about installing from an unknown source.

Installing the Android APK: Android will block it by default as an "unknown source." Open the downloaded file, tap through the "Install anyway" / "allow this source" prompt, then Install. This is normal for any app installed outside the Play Store, not a sign of a problem with this app specifically.

Why these numbers matter

Wi-Fi coverage isn't just "signal bars." llemonai WiFi Scanner surfaces the environmental and technical factors that actually determine performance.

FactorWhy it matters
Temperature & humidityAffects RF propagation and can stress AP/client hardware in enclosed spaces.
Device load & connected clientsMore clients on a channel means more contention and lower effective throughput per device.
InterferenceOverlapping channels and non-Wi-Fi RF noise directly reduce usable capacity.
Positioning & obstructionsDistance, walls, and line-of-sight change signal strength far more than most people expect.
Uplink throughputA great Wi-Fi signal can't outrun a slow upstream connection — both need to be checked together.