The best mobile app development platforms allow you to build feature-rich, attractively designed apps with little or no programming skills.
A push notification is an unprompted message that is delivered from a remote server and pushed to a mobile device. Technology giants Apple deliver their push notifications through Apple Push Notification Service (APNS). Conversely, Android utilise the Google Cloud Messaging (GCM) to deliver push notifications to android devices. Most Windows push notifications are received through the modernised WNS framework.Hire Push Notification Developers
i need help to setup onesignal on a exiting cordova project ios & Android
PLease check the requirements attached file