NetLens

A comprehensive Android network diagnostics toolkit. Inspect, diagnose, and monitor your network from a single app — no ads, no tracking, fully open-source.

Download the latest APK from GitHub Releases.

Features

Network Info

• IP Info — Public IP address and geolocation lookup (IPinfo API)
• WHOIS — Domain and IP ownership information with reverse DNS
• Cell Tower — Serving cell metrics, neighboring cells, and signal strength
• Security Posture — Aggregate network security score with factor breakdown

Connectivity

• Ping — Latency and reachability testing with continuous mode
• DNS Lookup — Query A, AAAA, MX, TXT, and other DNS record types
• Traceroute — Trace the network path with hop geolocation visualization
• Speed Test — Measure download/upload speed and latency with sparkline history

Discovery

• LAN Scan — Discover devices on your local network with MAC vendor lookup
• Devices — Persistent device inventory with custom names and Pro background watch that alerts when a new device joins a watched network
• mDNS Browser — Find Bonjour / .local services on the network
• Port Scanner — Scan for open TCP ports with risk severity badges
• WiFi Analyzer — View nearby networks, signal strength, and channel usage graph

Security & Web

• Wi-Fi Audit — Security audit on join with WPS / weak-cipher detection
• VPN Status — Tunnel state and leak check
• DNS Leak Test — Detect DNS queries escaping the configured resolver
• TLS Inspector — Inspect SSL/TLS certificates and cipher suites
• HTTP Tester — Send custom HTTP requests and inspect responses

Tools

• IP Calculator — Subnet calculator with CIDR notation, host ranges, and network class
• Wake-on-LAN — Send magic packets to wake network devices
• Endpoint Monitor — Track uptime and latency of HTTP endpoints
• Network Log — View connection history and network events
• History — Browse past scan results with search and filtering
• Home Screen Widget — Configurable Glance widget (4×1 / 4×2) with refresh and quick-launch chips

Building

Requirements

• JDK 17
• Android SDK with compileSdk 35
• Android Studio Ladybug or later (recommended)

Build

# FOSS debug APK (no billing, Pro always on)
./gradlew assembleFossDebug

# Google Play debug APK (with billing)
./gradlew assembleGplayDebug

# Run all unit tests
./gradlew testFossDebugUnitTest

# Run tests for a specific module
./gradlew :feature:ping:testFossDebugUnitTest

Release Signing

Create a keystore and add these properties to local.properties:

release.storeFile=path/to/release.keystore
release.storePassword=your-store-password
release.keyAlias=your-key-alias
release.keyPassword=your-key-password

Or set equivalent environment variables for CI: RELEASE_STORE_FILE, RELEASE_STORE_PASSWORD, RELEASE_KEY_ALIAS, RELEASE_KEY_PASSWORD.

./gradlew assembleRelease

Architecture

Multi-module Gradle project with convention plugins:

app                  — Single Activity, navigation host, theme
feature/*            — 24 self-contained feature modules
core/network         — Connectivity monitoring, SSRF guard, result export
core/data            — Room database, DAOs, Hilt data module
core/scan            — LAN scan engines + device-inventory repository (shared by lanscan & devices)
core/billing         — ProStatus interface (FOSS / Google Play flavors)
core/ui              — Shared UI tokens (status colors, spacing)
core/oui             — MAC address vendor lookup
widget               — Glance home screen widget
build-logic/         — Convention plugins (Android, Compose, Hilt)

Each feature module follows: Screen.kt (Compose UI) + ViewModel.kt (StateFlow) + di/Module.kt (Hilt) + engine/ (domain logic).

Stack: Jetpack Compose, Material 3, Hilt, Room, Ktor (CIO), Navigation Compose, Glance, dnsjava, kotlinx-serialization.

Privacy

NetLens does not collect, store, or transmit any personal data. See PRIVACY.md for the full privacy policy.

License

Copyright (C) 2026 Ventoux Advisory Co

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, version 3.

See LICENSE for the full text.