Flutter SDK

The Simplr Flutter SDK provides fraud signals, RUM, feature flags, feedback, and push notifications for iOS and Android apps from one package.

Features

• Device Fingerprinting - Hardware and software identification
• Behavioral Biometrics - Touch and typing pattern analysis
• Emulator Detection - Detect emulators and simulators
• Flutter Widgets - Drop-in form components
• Push Notifications - FCM and APNs delivery using your own provider accounts

Installation

Add to your pubspec.yaml:

dependencies:
  simplr_ai: ^1.1.0

Then run:

flutter pub get

Quick Example

import 'package:simplr_ai/simplr_ai.dart';

class SignupScreen extends StatefulWidget {
  @override
  _SignupScreenState createState() => _SignupScreenState();
}

class _SignupScreenState extends State<SignupScreen> {
  final _simplr = SimplrFraud();
  final _emailController = TextEditingController();

  Future<void> _onSubmit() async {
    // Collect all signals
    final signals = await _simplr.collect(context);

    // Send to your backend
    await api.post('/signup', {
      'email': _emailController.text,
      'signals': signals.toJson()
    });
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        SimplrTextField(
          tracker: _simplr,
          controller: _emailController,
          fieldName: 'email',
          decoration: InputDecoration(labelText: 'Email'),
        ),
        ElevatedButton(
          onPressed: _onSubmit,
          child: Text('Sign Up'),
        ),
      ],
    );
  }
}

What Gets Collected

Device Signals

Signal	Description
fingerprint	Unique device hash
device_id	Persistent device identifier
platform	"ios" or "android"
os_version	iOS/Android version
model	Device model (iPhone 14, Pixel 7)
manufacturer	Apple, Samsung, Google, etc.
screen_resolution	Screen dimensions
is_emulator	Emulator/simulator detection
is_rooted	Root/jailbreak detection

Behavioral Signals

Signal	Description
keystroke.avg_delay	Time between keystrokes
keystroke.typing_speed	Characters per second
touch.avg_pressure	Touch pressure (if available)
touch.swipe_velocity	Swipe speed
form_fill_time	Time to complete form

Platform Support

Platform	Version
iOS	12.0+
Android	API 21+ (5.0)
Flutter	3.16.0+

Permissions

Android

Fraud signals and RUM require no special permissions. Mobile push uses Firebase Messaging; Android 13 and later requires notification permission before alerts can be displayed. Call simplr.push?.requestPermission() from user-initiated UI.

iOS

Fraud signals and RUM use standard iOS APIs. Mobile push requires the Push Notifications capability and notification permission. Complete Firebase's iOS setup so the SDK can obtain the native APNs token.

Next Steps

• Installation - Detailed setup guide
• Quick Start - Basic integration
• Widgets - Flutter widget reference
• Push Notifications - Configure FCM and APNs delivery