flutter_iap

Add In-App Payments to your Flutter app with this plugin.

  • You can retrieve a list of previously purchased IAP product IDs (only Android)
  • You can fetch IAP products from Google Play and App Store
  • You can buy an IAP product
  • You can restore purchases from App Store (only iOS)

Getting Started

For help getting started with Flutter, view our online documentation.

For help on editing plugin code, view the documentation.

Install

Add flutter_iap as a dependency in pubspec.yaml

For help on adding as a dependency, view the documentation.

Example

Note: You must set up billing information in your developer account corresponding with the platform you are testing (iTunes Connect / Google Play Console)

import 'package:flutter/material.dart';
import 'package:flutter_iap/flutter_iap.dart';

void main() => runApp(new MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {
  List<String> _productIds = [];
  List<String> _alreadyPurchased = [];

  @override
  initState() {
    super.initState();
    init();
  }

  init() async {
    List<String> productIds = ["com.example.testiap"];

    IAPResponse response = await FlutterIap.fetchProducts(productIds);
    productIds = response.products
        .map((IAPProduct product) => product.productIdentifier)
        .toList();

    IAPResponse purchased = await FlutterIap.fetchInventory();
    List<String> purchasedIds = purchased.purchases
        .map((IAPPurchase purchase) => purchase.productIdentifier)
        .toList();

    if (!mounted) return;

    setState(() {
      _productIds = productIds;
      _alreadyPurchased = purchasedIds;
    });
  }

  @override
  Widget build(BuildContext context) {
    String nextPurchase = _productIds.firstWhere(
      (id) => !_alreadyPurchased.contains(id),
      orElse: () => null,
    );

    List<Text> list = [];
    _alreadyPurchased.forEach((productId) {
      list.add(new Text(productId));
    });

    if (list.isEmpty) {
      list.add(new Text("No previous purchases found."));
    } else {
      list.insert(0, new Text("Already purchased:"));
    }

    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: new Text("flutter_iap example app"),
        ),
        body: new Center(
          child: new Column(
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              new Text(
                _productIds.isNotEmpty
                    ? "Fetched: $_productIds"
                    : "Not working?\n"
                    "Check that you set up in app purchases in\n"
                    "iTunes Connect / Google Play Console",
                textAlign: TextAlign.center,
                textScaleFactor: 1.25,
              ),
              new SizedBox(
                height: 24.0,
              ),
            ].followedBy(list).toList(),
          ),
        ),
        floatingActionButton: nextPurchase != null
            ? new FloatingActionButton(
                child: new Icon(Icons.monetization_on),
                onPressed: () {
                  FlutterIap.buy(nextPurchase);
                },
              )
            : new Container(),
      ),
    );
  }
}

Libraries

flutter_iap