- Android Support v4 (Development Framework)   The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see  Understanding the Android Support Library. 
- AppCompat (Utility)   support newer Android features on older Android versions. 
- Browser (Utility)   display webpages in the user's default browser. 
- Constraint Layout Library (Utility)   library to reduce the number of nested views needed. 
- Coordinatorlayout (UI Component)   AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton. 
- Androidx Core (Utility)   a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs. 
- DataStore (Development Aid)   stores data asynchronously, consistently, and transactionally, overcoming some of the drawbacks of SharedPreferences. 
- Android Emoji2 Compat (UI Component)   core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters. 
- AndroidX Fragment (UI Component)   AndroidX library to encapsulate part of the user interface or behavior into reusable components. 
- Lifecycle (Utility)   perform actions in response to a change in the lifecycle status of another component, such as activities and fragments. 
- AndroidX Media (Utility)   share media contents and controls with other apps. 
- Preference (Utility)   a library to build interactive settings screens without needing to interact with device storage or manage the UI. 
- ProfileInstaller (Utility)   AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART. 
- Recyclerview (Utility)   display large sets of data in your UI while minimizing memory usage. 
- Startup (Utility)   AndroidX library to implement a straightforward, performant way to initialize components at app startup. 
- Android Jetpack VersionedParcelable (Utility)   Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely. 
- Jetpack WindowManager Library (Utility)   enables application developers to support new device form factors and multi-window environments. The library provides a common API surface for API versions 14 and later. Especially provides additional functionality on foldable devices. 
- flutter_local_notifications (UI Component)   a Flutter plugin for displaying local notifications. 
- jni (Utility)   a support library to access JNI from Dart / Flutter code. 
- Google Material Design (Utility)   library to help with material design guidelines. 
- Tink (Utility)   a multi-language, cross-platform library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse. 
- Google Gson (Utility)   A Java serialization/deserialization library to convert Java Objects into JSON and back. 
- Google Protocol Buffers (Utility)   library that deals with Protocol Buffers (a.k.a., protobuf) – Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data. 
- open_file_plus (Utility)   a plugin that can call native APP to open files with string result in flutter, support iOS(UTI) / android(intent) / PC(ffi) / web(dart:html). 
- flutter_email_sender (Utility)   allows send emails from flutter using native platform functionality. 
- Flutter (Development Framework)   a cross-platform development kit created by Google, based on the Dart programming language. 
- cronet_http (Utility)   an Android Flutter plugin that provides access to the Cronet HTTP client. 
- Image Picker plugin for Flutter (Utility)   a Flutter plugin for picking images from the image library, and taking new pictures with the camera. 
- url_launcher (Utility)   a Flutter plugin for launching a URL. 
- notifications_listener_service (Utility)
 requires 3 permissions: android.permission.WAKE_LOCK, android.permission.RECEIVE_BOOT_COMPLETED, android.permission.FOREGROUND_SERVICE  defines notification listener service to enable app to do a specific action one it receives notification in foreground or background and even if the app is terminated. 
- Apache Tika (Utility)   detects and extracts metadata and text from over a thousand different file types (such as PPT, XLS, and PDF). 
- Chromium Base (Utility)   base classes of the Google Chromium project. 
- Chromium Build (Utility)   Chromium's Core GN templates and configuration as well as Core Python build scripts. 
- Chrome Networking Stack (Utility)   a mostly single-threaded cross-platform library primarily for resource fetching. 
- Chrome's URL library (Utility)   Chromium's networking layer for parsing, canonicalisation and more.