Login to Onesignal, create a new app, go to app setting Config the Apple IOS
Click Config to open the popup config, follow the guide Generate ios push Certificate to generate the certificate and upload to the site.
Select Tab "Keys & Id" to get the OneSignal app id, and open MStore project, go toi os
ios/AppDelegate.m and replace the App Id by your One Signal App Id
self.oneSignal = [[RCTOneSignal alloc] initWithLaunchOptions:launchOptions appId:@ YOUR-APP-ID]
Follow the same guide above for iOS
Select Tab "Keys & Id" to get the OneSignal app id, Go to
android/app/build.grade and change the APP_ID & GOOGLE PROJECT NUMBER:
manifestPlaceholders = [onesignal_app id: "APP_ID ", onesignal_google_project number: "PROJECT_NUMBER "]
Go to Configuration and fill in the APP ID, REST API Key, and your subdomain.
The default setting for the plugin "Automatically send a push notification when I create a post from the WordPress editor" is turn on, it's mean whenever you publish the post item, it will send notification auto to your user mobiles.