OneSignal is a high volume and reliable push notification system for mobile and web applications.

OneSignal is the most widely used push notification service for both web and mobile developers, with over 325,000 registered developers and 175,000 applications and websites.

Best of all, OneSignal is a free service that supports unlimited devices and notifications. OneSignal makes money by selling data to advertisers and research companies.

In this app, everything you need to do is to open Config.swift file and fill oneSignalAppID to make it work. OneSignal SDK is allready installed in the app and you don't need to worry about this.

To get OneSignal App ID, you need to Generate an iOS Push Certificate.

Generate an iOS Push Certificate

After that, open Keys & IDs and copy ONESIGNAL APP ID in Config.swift

Keys & IDs