OmniTAK-Android

Open-source TAK (Team Awareness Kit) client for Android, built with Kotlin + Jetpack Compose.

OmniTAK speaks Cursor-on-Target (CoT) over TLS to any TAK Server, supports tactical map rendering via MapLibre, ADS-B traffic display, Meshtastic radios, drawing tools, and more — designed for search-and-rescue, civil defense, and outdoor operations.

Bring your own TAK Server. OmniTAK is a client. Stand up TAK Server (community CIV edition) or FreeTAKServer and point OmniTAK at it.

Download

Current release: v0.2.2 (versionCode 18) — foreground service holds the TLS socket warm during backgrounding so Doze / app-standby can no longer kill the read loop within ~10s. Carries forward v0.2.1's coordinate / units pickers, map camera preservation, and resume-reconnect; v0.2.0's auto-PPLI, live counters, and zip sideload.

• Signed APK (sideload): OmniTAK-0.2.2-vc18.apk
• Always-latest APK: releases/latest
• Google Play (closed testing): ask J for an invite

Upgrading? versionCode is monotonic — every release ratchets the integer up. Android allows in-place upgrade as long as the signing cert is unchanged.

Verify the APK before installing — signing cert SHA-256 should be 9f3b1fd54ad4eb1dc5b45d91deac4699869617d3d2ac425a1b70337aa0eb13af:

apksigner verify --print-certs OmniTAK-0.2.2-vc18.apk

Features

• TAK Server connectivity — TCP / TLS / mTLS with client-certificate enrollment
• Cursor-on-Target — full CoT XML parser, marker rendering, server messaging
• Tactical map — MapLibre Native Android with custom layers (contacts, drawing, aircraft, mesh nodes, grid, measurement)
• ADS-B traffic — aircraft overlay with bring-your-own provider
• Meshtastic — TCP connection to Meshtastic mesh radios
• Drawing tools — points, lines, polygons, range/bearing, measurement
• Multi-server management — connect to multiple TAK servers
• Radial menu — quick actions on map long-press
• Material 3 dark theme — tactical color palette

Requirements

• Android 8.0 (API 26) or later
• Android Studio Ladybug or later (for development)
• JDK 17
• A TAK Server you can reach (BYO — see above)

Getting started

git clone https://github.com/engindearing-projects/OmniTAK-Android.git
cd OmniTAK-Android
./gradlew assembleDebug

The debug APK lands at app/build/outputs/apk/debug/app-debug.apk.

To install on a connected device:

./gradlew installDebug

Or open the project in Android Studio and run normally — debug builds work out-of-the-box without any signing key configuration.

Release builds (your own signing key)

To produce a release APK signed with your own upload key:

1. Generate an upload keystore:

   keytool -genkey -v -keystore my-upload.jks -keyalg RSA -keysize 2048 -validity 10000 -alias upload

2. Copy keystore.properties.example to keystore.properties (gitignored) and fill in your values
3. Build:

   ./gradlew assembleRelease

If keystore.properties is absent, release builds gracefully fall back to the debug signing config so the project always builds.

Architecture

app/src/main/kotlin/soy/engindearing/omnitak/mobile/
├── data/            # Models + persistence (TAKServer, CoTEvent, ChatMessage, …)
├── domain/          # State stores (ServerManager, ChatStore, ContactStore, …)
└── ui/
    ├── screens/     # Top-level screens (Map, Servers, Chat, Meshtastic, Settings, …)
    ├── components/  # Reusable layers and widgets (TacticalMap, RadialMenu, …)
    ├── navigation/  # Compose Navigation graph
    └── theme/       # Material 3 theme + tactical colors

The app is pure Kotlin + Compose with no native bridge. A future release will integrate the shared OmniTAK Rust core via JNI — its source is being prepared for separate open-source release as OmniTAK-Core.

Permissions

Permission	Why
INTERNET	TAK Server connectivity
ACCESS_NETWORK_STATE	Detect connectivity changes
ACCESS_FINE_LOCATION	Self-location reporting (PPLI), GPS-aware tools
ACCESS_COARSE_LOCATION	Fallback for users who deny precise location

No tracking, no analytics, no third-party SDKs.

Security & privacy

• All TAK Server connections are TLS 1.2+ by default
• Client certificates are stored in Android Keystore
• No outbound traffic except to user-configured TAK Servers and ADS-B providers

Found a vulnerability? See SECURITY.md for responsible disclosure.

Contributing

Contributions welcome. See CONTRIBUTING.md. For larger changes, please open an issue first.

License

Apache License 2.0. See LICENSE.

OmniTAK-Android uses the following open-source components:

• MapLibre Native Android — BSD 2-Clause
• AndroidX — Apache 2.0
• kotlinx.serialization — Apache 2.0
• Jetpack Compose — Apache 2.0

Acknowledgments

Built by Engindearing. Inspired by ATAK, iTAK, FreeTAKServer, and the broader TAK community.

The companion iOS client is OmniTAK-iOS.

OmniTAK is not affiliated with or endorsed by the U.S. Department of Defense, the TAK Product Center, or any other organization.