document.addEventListener("deviceready", function(){
    var args = [];
    var devKey = "xxXXXXXxXxXXXXxXXxxxx8";   // your AppsFlyer devKey
    args.push(devKey);
    var userAgent = window.navigator.userAgent.toLowerCase();

    if (/iphone|ipad|ipod/.test( userAgent )) {
        var appId = "123456789";            // your ios app id in app store
        args.push(appId);
    }
    window.plugins.appsFlyer.initSdk(args);
}, false);