Last updated: May 21, 2026
SubTrack Open Source Licenses
SubTrack uses open source and platform libraries to provide its Android app experience.
Android Open Source Project
SubTrack is built on Android platform APIs provided by the Android Open Source Project.
License: Apache License 2.0.
AndroidX and Jetpack
SubTrack uses AndroidX libraries including Activity Compose, Core KTX, Lifecycle, Navigation Compose, Room, WorkManager, Hilt Navigation Compose, Browser (Chrome Custom Tabs), Compose UI, Compose Material, Compose Material Icons, Compose Material 3, and related Compose tooling.
License: Apache License 2.0.
Kotlin, Coroutines, and Serialization
SubTrack uses Kotlin, Kotlin coroutines, Flow, and kotlinx.serialization for app code, asynchronous work, preferences, and import/export serialization.
License: Apache License 2.0.
Dagger Hilt
SubTrack uses Dagger Hilt for dependency injection.
License: Apache License 2.0.
Coil
SubTrack uses Coil to load built-in service logos and user-selected custom subscription logos.
License: Apache License 2.0.
Ktor
SubTrack uses Ktor Client to fetch the small update-configuration file that controls in-app update prompts.
License: Apache License 2.0.
Google Play Billing Library
SubTrack uses the Google Play Billing Library for premium purchase and entitlement support.
License: Android Software Development Kit License Agreement and applicable Google Play terms.
Google Play In-App Updates
SubTrack uses the Google Play In-App Updates library (Play Core) to offer optional and required app updates through Google Play.
License: Play Core Software Development Kit Terms of Service and applicable Google Play terms.
Google Play Age Signals
SubTrack uses the Google Play Age Signals API to request age and parental-approval signals in jurisdictions where Google Play provides them for legal compliance.
License: Play Core Software Development Kit Terms of Service and applicable Google Play terms.
Build and test tooling
SubTrack development also uses Gradle, Android Gradle Plugin, Kotlin Symbol Processing, Room compiler, JUnit, AndroidX Test, Espresso, and Gradle Play Publisher.
Licenses vary by tool and are available from each project's published license files.