> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fingerprint.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Flutter
Fingerprint Flutter is an [official open-source library](https://github.com/fingerprintjs/fingerprintjs-pro-flutter) for the Flutter ecosystem. The package is also published at [pub.dev](https://pub.dev/packages/fpjs_pro_plugin) package repository. This library supports Android, iOS, and web platforms. View our [Flutter quickstart](/docs/v3/flutter-quickstart) for a step-by-step guide to get started.
## Requirements
The Flutter SDK uses the [Android](/docs/native-android-integration) and [iOS](/docs/ios) SDKs under the hood, so it has the same minimum OS version requirements:
* Android 5.0 (API level 21+) or higher
* iOS 13+/tvOS 15+, Swift 5.7 or higher
* Flutter 3.13 or higher
* Dart 3.3 or higher
## 1. Install the plugin
Add `fpjs_pro_plugin` to the `pubspec.yaml` file in your Flutter app:
```yaml YAML theme={"theme":"github-dark-dimmed"}
dependencies:
flutter:
sdk: flutter
...
fpjs_pro_plugin: ^3.3.2
```
Run `flutter pub get` to download and install the package.
To use this plugin on the web, add the JavaScript agent loader `
```
## 2. Identify visitors
```dart Dart theme={"theme":"github-dark-dimmed"}
import 'package:flutter/material.dart';
import 'package:fpjs_pro_plugin/fpjs_pro_plugin.dart';
import 'package:fpjs_pro_plugin/error.dart';
import 'package:fpjs_pro_plugin/region.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatefulWidget {
@override
State createState() => _MyAppState();
}
class _MyAppState extends State {
@override
void initState() {
super.initState();
initFingerprint();
}
// Initialize Fingerprint
void initFingerprint() async {
await FpjsProPlugin.initFpjs(
'PUBLIC_API_KEY', // insert your API key here
region: Region.us, // Insert the data region of your Fingerprint workspace
);
identify();
}
// Identify visitor
void identify() async {
try {
var visitorId = await FpjsProPlugin.getVisitorId();
var visitorData = await FpjsProPlugin.getVisitorData();
print('Visitor ID: $visitorId');
print('Visitor data: $visitorData');
} on FingerprintProError catch (e) {
// Process the error
print('Error identifying visitor: $e');
}
}
// ...
}
```
### Documentation
You can find the full documentation in the [official GitHub repository](https://github.com/fingerprintjs/fingerprintjs-pro-flutter). The repository also contains [an example app](https://github.com/fingerprintjs/fingerprintjs-pro-flutter/tree/main/example) demonstrating usage of the library.