ngCordova Datepicker doest not show in iOS 9.1 in a .ipa app

I have used Ionic Package to create .ipa file and installed in the iPhone iOS 9.1 but this Cordova datepicker plugin https://github.com/VitaliiBlagodir/cordova-plugin-datepicker
does not show up, also the Toast plug in https://github.com/EddyVerbruggen/Toast-PhoneGap-Plugin
does not work.
Both these plugins work in the iOS 9.1 Simulator via Ionic Emulate and xCode 7.1.1
I am using ionicplatformready as per below
$ionicPlatform.ready(function() {
$cordovaDatePicker.show(options).then(function(date){
$scope.addmatch.matchdate = date;
});
});

any help on this would be greatly appreciated.