[Flutter package] An easy and quick way to check if the local app is updated with the same version in their respective stores (Play Store / Apple Store ).

final appleId = '1234567890'; // If this value is null, its packagename will be considered
final playStoreId = 'com.example.app'; // If this value is null, its packagename will be considered
final country = 'br' // If this value is null 'us' will be the default value
await AppVersionUpdate.checkForUpdates(
            appleId: appleId, playStoreId: playStoreId, country: country)
        .then((data) async {
            print(data.storeUrl);
            print(data.storeVersion);
            if(data.canUpdate!){
              //showDialog(... your custom widgets view) 
              //or use our widgets
              // AppVersionUpdate.showAlertUpdate
              // AppVersionUpdate.showBottomSheetUpdate
              // AppVersionUpdate.showPageUpdate
              AppVersionUpdate.showAlertUpdate(
              appVersionResult: data, context: context);
            }
         });

// you also have some options to customize our Alert Dialog 
AppUpdateVersion.showAlertUpdate({
    @required AppVersionResult? appVersionResult,
    @required BuildContext? context,
    String? title = 'New version available',
    String? content = 'Would you like to update your application?',
    String? cancelButtonText = 'Update later',
    String? updateButtonText = 'Update',
    ShowModalType? modalType = ShowModalType.alert_dialog, //anothers: page and bottom_sheet
    Color? backgroundColor = Colors.white,
    TextStyle? cancelTextStyle = const TextStyle(color: Colors.red),
    TextStyle? updateTextStyle = const TextStyle(color: Colors.green),
    TextStyle? titleTextStyle = const TextStyle(
        fontSize: 20.0, fontWeight: FontWeight.w700, color: Colors.black),
    ButtonStyle? cancelButtonStyle = const ButtonStyle(
        overlayColor: MaterialStatePropertyAll(Colors.black12)),
    ButtonStyle? updateButtonStyle = const ButtonStyle(
      overlayColor: MaterialStatePropertyAll(Colors.black12),
    ),
  })

Customize the our bottom sheet

AppUpdateVersion.showBottomSheetUpdate(
      {@required BuildContext? context,
      @required AppVersionResult? appVersionResult,
      bool? mandatory = false,
      String? title = 'New version avaible',
      Widget? content}) async {
    await showModalBottomSheet(
        isDismissible: !mandatory!,
        context: context!,
        builder: (context) => BottomSheetUpdateVersion(
              appVersionResult: appVersionResult,
              mandatory: mandatory,
              content: content,
              title: title,
            ));
  }

Customize the Page
// you also have some options to customize our Page
AppUpdateVersion.showPageUpdate(
    {@required BuildContext? context,
    @required AppVersionResult? appVersionResult,
    bool? mandatory = false,
    Widget? page}) async {
     Navigator.push(
        context!,
        MaterialPageRoute(
            builder: (context) =>
                page ??
                UpdateVersionPage(
                  mandatory: mandatory,
                  appVersionResult: appVersionResult,
                )));
  }