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Port Authority

github.com

Free plan Android
Visit github.com
Spec score 7.8 #13 of 26 in Port Scanner Software

What it is

Port Authority is a free Android port scanner for discovering network hosts and viewing network information. It discovers LAN hosts and public IP addresses, then scans TCP ports on LAN and WAN hosts with custom ranges. Network tools include MAC-address vendor detection, DNS record lookups, and Wake-on-LAN for local hosts. Lightweight SSH and HTTP(S) fingerprinting identifies server type and version. The maker describes host discovery as typically taking less than five seconds and scans as heavily threaded. The app says it has no ads or analytics trackers and does not track, collect, or share data. It requires limited permissions for network interaction. Public IP detection uses the maker’s open-source stateless service. The free app is GPL-3.0 licensed; a 4.99 USD once donation plan has the same features.

Spec sheet

Purpose
Port Authority is an Android port scanner that discovers network hosts and displays network information about the device and other hosts.Read 9 Oct 2026 · github.com
Privacy
The maker says the app does not track, collect, or share data and has no ads or analytics trackers.Read 9 Oct 2026 · github.com
Support
The Google Play listing provides a support email of [email protected].Read 9 Oct 2026 · play.google.com
License
The project repository identifies its license as GPL-3.0.Read 9 Oct 2026 · github.com
Host discovery
The app supports LAN host discovery and public IP discovery.Read 9 Oct 2026 · github.com
Network tools
Features include MAC address vendor detection, DNS record lookups, and Wake-on-LAN for LAN hosts.Read 9 Oct 2026 · github.com
Performance
The maker says host discovery typically takes less than five seconds and describes scans as heavily threaded.Read 9 Oct 2026 · github.com
Permissions
The maker says the app requires very limited permissions because it only needs to interact with the network.Read 9 Oct 2026 · github.com
Port scanning
It scans TCP ports on LAN and WAN hosts and supports custom port ranges.Read 9 Oct 2026 · github.com
Public IP service
The app uses the maker’s open source, stateless service to determine the public IP address.Read 9 Oct 2026 · github.com
Scan limits
The maker notes that scanning large port ranges with too many threads may cause out-of-memory crashes and recommends lowering the thread count.Read 9 Oct 2026 · github.com
Service identification
The app provides lightweight SSH and HTTP(S) service fingerprinting, including server type and version.Read 9 Oct 2026 · github.com
WAN scanning
The maker says WAN scans are best effort and mobile carriers may shape traffic or terminate connections during port scans.Read 9 Oct 2026 · github.com

Plans and prices

Free Free Android app · no ads · open source Read 9 Oct 2026 · play.google.com
Donate $4.99, paid once Android app · same features as free version Read 9 Oct 2026 · play.google.com

Every Port Authority plan and price →

Strong points and limits

Strong points

  • Discovers LAN hosts and public IP
  • Supports custom TCP port ranges
  • Includes DNS, MAC, and Wake-on-LAN tools
  • Provides SSH and HTTP(S) fingerprinting
  • No ads or analytics trackers

Limits

  • Large scans and many threads may cause out-of-memory crashes
  • WAN scans are best effort
  • Android only

Who it suits

It suits Android users who need LAN or WAN port scanning, host discovery, and basic service identification.

Verdict

Port Authority combines host discovery, configurable TCP scanning, and practical network lookups in an Android app. Large scans need conservative thread settings, and WAN results can be affected by mobile carriers.

Where Specifiction places it

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