Is your WiFi network secure? Unknown devices connecting to your network can slow down your internet, access your files, and even compromise your personal data. These Android apps help you monitor, analyze, and secure your WiFi network from unauthorized access.
Best Network Scanner Apps
1. Fing - Network Tools
Best Overall Network Scanner
Fing is the most popular network scanning app with over 50 million users. It discovers all devices connected to your WiFi network and provides detailed information about each one.
- Instant network discovery
- Device identification (brand, model)
- Internet speed test
- Port scanner
- WiFi security assessment
- Intruder alerts
2. WiFiman
Best from Ubiquiti
Created by Ubiquiti, WiFiman offers professional-grade WiFi analysis tools including signal strength mapping, channel analysis, and network discovery.
- WiFi signal heat map
- Channel overlap analyzer
- Network device scanner
- Speed test
- Clean, ad-free interface
- No account required
3. Net Analyzer
Best for Detailed Analysis
Net Analyzer provides comprehensive network diagnostic tools including ping, traceroute, DNS lookup, and Whois queries.
- LAN scanner
- Ping and traceroute
- DNS lookup
- Port scanner
- Wake on LAN
- Network info widget
Best WiFi Security Apps
4. Who Uses My WiFi
Best for Monitoring Unknown Devices
Specifically designed to detect unauthorized devices on your network. Get notifications when new devices connect.
- Real-time monitoring
- New device alerts
- Device history log
- Block suggestions
- Easy interface
- Background scanning
5. WiFi Analyzer
Best for Channel Optimization
Analyze nearby WiFi networks and find the best channel for your router to minimize interference and improve performance.
- Channel graph visualization
- Signal strength meter
- Best channel suggestion
- Network details
- No root required
- Completely free
6. Network Scanner by First Row
Best Open Source Scanner
A powerful, open-source network scanner that detects all devices on your local network with detailed information.
- Fast network scanning
- MAC address lookup
- Open ports detection
- Device vendor identification
- Export scan results
- No ads, open source
Best VPN Apps for WiFi Security
7. NordVPN
Best VPN for Public WiFi
When using public WiFi, a VPN encrypts your connection to prevent hackers from intercepting your data.
- Military-grade encryption
- 5,500+ servers worldwide
- No-logs policy
- Kill switch
- Threat protection
- 6 device connections
8. ProtonVPN
Best Free VPN
From the makers of ProtonMail, ProtonVPN offers a genuinely free tier with no data limits and no ads.
- Unlimited free tier
- No ads, no data selling
- Swiss privacy laws
- Open source apps
- Secure core servers
- No-logs policy
Best Password Generators for WiFi
9. Random Password Generator
Best for Strong WiFi Passwords
Generate strong, random passwords for your WiFi network that are virtually impossible to crack.
- Customizable length
- Special characters option
- Multiple password types
- Copy to clipboard
- Password strength indicator
- Offline generation
10. IP Tools: WiFi Analyzer
Best All-in-One Tool
A comprehensive network toolkit combining scanner, analyzer, and diagnostic tools in one app.
- Network scanner
- WiFi analyzer
- Ping tool
- Traceroute
- DNS lookup
- Port scanner
Comparison Table
| App | Best For | Free | Ads |
|---|---|---|---|
| Fing | Network scanning | Yes | Yes |
| WiFiman | WiFi analysis | Yes | No |
| Who Uses My WiFi | Intruder detection | Yes | Yes |
| WiFi Analyzer | Channel optimization | Yes | Yes |
| NordVPN | Public WiFi security | No | No |
| ProtonVPN | Free VPN | Yes | No |
How to Secure Your WiFi Network
1. Use Strong Encryption
Always use WPA3 (or WPA2 if WPA3 unavailable). Never use WEP - it can be cracked in minutes.
2. Create a Strong Password
- At least 12 characters
- Mix of letters, numbers, symbols
- Avoid dictionary words
- Don't use personal information
3. Change Default Settings
- Change default admin password
- Change default SSID name
- Disable WPS (WiFi Protected Setup)
- Disable remote management
4. Enable MAC Filtering
Only allow known devices by their MAC addresses. Note: This can be bypassed but adds a layer of security.
5. Keep Firmware Updated
Regularly update your router's firmware to patch security vulnerabilities.
6. Use a Guest Network
Create a separate network for guests to keep your main network isolated.
Signs Your WiFi May Be Compromised
- Unexplained slow internet speeds
- Unknown devices in router admin panel
- Changed router settings
- Unexpected data usage spikes
- Strange network activity at odd hours
FAQ
Can someone hack my WiFi?
Yes, especially if you use weak passwords or outdated encryption (WEP). Use WPA3/WPA2 with a strong password.
How do I kick someone off my WiFi?
Log into your router admin panel, find the connected devices list, and block the unknown device's MAC address.
Is hiding my SSID secure?
Not really. Hidden networks can still be discovered with the right tools. Focus on strong encryption and passwords instead.
Do I need a VPN on my home WiFi?
A VPN on home WiFi adds privacy from your ISP but isn't necessary for security if your network is properly secured. Always use a VPN on public WiFi.
Regularly monitoring your WiFi network with these apps helps you identify unauthorized access early. Combined with strong security practices, you can keep your network safe from intruders.