Testing iOS Push Notifications on a Real Device with APNs and Node.js

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The iOS Simulator cannot catch production push problems because it never contacts Apple's servers, so a real device is needed for accurate testing. The guide explains how to enable the Push Notifications capability in Xcode and log the device token from the app. It warns that tokens from Xcode builds are sandbox tokens while TestFlight and App Store builds use production tokens, a common cause of push failures. It also describes creating an APNs .p8 authentication key in the Apple Developer account, noting that the key does not expire and that the environment choice cannot be changed later. Finally, it shows how to structure a JSON payload and send it through APNs using a short Node.js script with HTTP/2 and a signed JWT.

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