A Flutter App for Android is a mobile application developed using the Flutter framework specifically for the Android operating system. Flutter is a UI toolkit from Google that enables the creation of natively compiled applications for mobile, web, and desktop from a single codebase.

Key features of a Flutter app for Android include:

1. Cross-Platform Compatibility: Flutter allows developers to write code once and deploy it on multiple platforms, including Android, iOS, and web, saving time and effort in development.

2. Native Performance: Flutter apps are compiled directly to native ARM code for Android, providing high performance and smooth user experiences.

3. Rich User Interfaces: Flutter offers a rich set of pre-designed widgets and customizable UI components, enabling developers to create visually appealing and responsive user interfaces.

4. Fast Development: Flutter's hot reload feature allows developers to quickly see changes in the app's UI in real-time, speeding up the development process and facilitating rapid iteration.

5. Access to Native Features: Flutter provides plugins and packages that allow developers to access native device features such as camera, location, sensors, and more, enhancing the functionality of the app.

6. Material Design: Flutter offers built-in support for Google's Material Design guidelines, enabling developers to create apps with consistent and intuitive UI patterns that align with Android's design principles.

7. Community and Support: Flutter has a vibrant community of developers and contributors, providing resources, tutorials, and support to help developers build and maintain their Flutter apps for Android.

Overall, a Flutter app for Android offers a powerful and efficient platform for developing high-quality mobile applications that can reach a wide audience of Android users.