Probe everything. Shield everyone.
A powerful network security audit tool for Android.
ProbeShield scans your local WiFi network to identify connected devices, open ports, and security vulnerabilities — giving you a clear risk picture of everything on your network.
- 🔍 Device Discovery — ARP + mDNS + ping sweep
- 🔌 Port Scanner — Top 100 TCP ports per device
- 🏷️ Manufacturer Lookup — MAC OUI identification
⚠️ Risk Scoring — Critical / High / Medium / Safe ratings- 📜 Scan History — All scans stored locally on your device
- 🔒 App Lock — PIN + biometric protection
- 🚫 No cloud — 100% on-device, no data ever leaves your phone
On your Android device:
- Open Settings
- Go to Apps → Special app access → Install unknown apps
- Select your browser (Chrome, Firefox, etc.)
- Toggle "Allow from this source" ON
ℹ️ On some devices this prompt appears automatically when you tap the downloaded APK.
- Open your Downloads folder
- Tap
ProbeShield-v1.0.0.apk - Tap Install
- Tap Open
| Requirement | Minimum |
|---|---|
| Android version | 8.0 (Oreo) / API 26 |
| Storage | ~25 MB |
| Network | WiFi connection required |
| Permissions | See below |
ProbeShield requests the following permissions — here's exactly why each one is needed:
| Permission | Why it's needed |
|---|---|
ACCESS_WIFI_STATE |
Read WiFi network info (SSID, gateway IP) |
ACCESS_FINE_LOCATION |
Required by Android to scan WiFi networks |
INTERNET |
Send probe packets to devices on your network |
USE_BIOMETRIC |
App lock via fingerprint |
USE_FINGERPRINT |
App lock fallback (older devices) |
🔒 No data is ever transmitted to any server. All scan results are stored locally on your device only.
See CHANGELOG.md for full version history.
ProbeShield is currently in closed beta. If you'd like to participate:
- Install the APK using the instructions above
- Use the app on your home/office WiFi for a few days
- Report any bugs via Issues
- Share feedback via support@probeshield.com
| Channel | Link |
|---|---|
| support@probeshield.com | |
| 🌐 Website | probeshield.com |
| 🔒 Privacy Policy | probeshield.com/privacy |
| 📄 Terms of Service | probeshield.com/terms |
| 🐛 Bug Reports | GitHub Issues |
ProbeShield is intended for use on networks you own or have explicit permission to scan. Unauthorised scanning of networks is illegal in most jurisdictions.
By using ProbeShield you agree to our Terms of Service.
Made with ❤️ by Saikiran Bavandla
© 2025 ProbeShield. All rights reserved.