⚡Network Security Auditor  ·  Android 8.0+

Probe Everything.Shield Everyone.

Discover every device on your WiFi, scan for open ports, and get a clear risk picture — 100% on-device. No account. No cloud. No compromise.

Get it on Google PlayFree · Android 8+View on GitHub
☁️ No Cloud🔑 No Account📵 No Tracking⚡ Fully Offline
100+
TCP ports per device
0
Bytes sent to cloud
5
Risk severity tiers
100%
On-device processing
Everything you need

Complete Network Security
in Your Pocket

Six powerful tools, one app. No cloud subscription, no monthly fees, no sign-up.

Device Discovery

ARP + mDNS + ping sweep identifies every device on your WiFi within seconds — including hidden ones.

Port Scanner

Probes the top 100 TCP ports per device, exposing open attack surfaces and running services.

Manufacturer ID

MAC OUI lookup tells you exactly which brand and model each device is — no guessing.

Risk Scoring

Five-tier security ratings — Critical to Safe — with per-device vulnerability breakdowns.

Scan History

Every scan saved locally. Compare over time to catch new devices and emerging threats.

App Lock

PIN + biometric protection. Your audit data stays private even on shared devices.

Risk intelligence

Five-Tier Security Rating

Every device gets a clear, unambiguous severity label — so you know exactly what to fix first.

Critical
Remote exploit possible
High
Significant exposure found
Medium
Potential weakness detected
Low
Minor issue noted
Safe
No threats identified
🛡️

Your Network. Your Data.
Full Stop.

ProbeShield was built on a single principle: a security tool should never itself be a security risk.

✓Zero data ever leaves your phone
✓No account or sign-up required
✓No analytics, crash reporters, or ads
✓Scan history stored in local Room database
✓Optional PIN + biometric app lock
✓Open permissions model — full transparency
Get started in minutes

How It Works

01

Connect to WiFi

Launch ProbeShield on your Android device while connected to any home or office WiFi network.

02

Start Network Scan

Tap "Start Network Scan." ProbeShield maps every device, probes ports, and fingerprints manufacturers.

03

Review Risk Report

Get a prioritised risk list with per-device breakdowns. Export a full PDF audit report.

Start Auditing Your
Network Today

Free download. No account. No cloud. Just a powerful network security audit in the palm of your hand.

Android 8.0 (Oreo) and above  ·  ~25 MB