How to add AdMob ads to an iOS app

What AdMob does for an iOS app

AdMob lets you earn revenue by showing ads: banners along the bottom of a screen, interstitials between screens, rewarded ads that grant something in exchange for watching. Google fills the ad inventory and pays out based on impressions and clicks. For an iOS app the work is adding the SDK, declaring your app ID, handling the tracking consent prompt, and placing ad views where they fit without hurting the experience.

Adding it with AppFlight, and manually

In AppFlight you ask for AdMob, and the AI adds the Google Mobile Ads SDK, the Info.plist app ID entry, the App Tracking Transparency request, and a banner view. AppFlight treats the app ID and ad unit IDs as client values, since there is no secret to protect. You can then ask the AI to add an ad-free tier gated behind a subscription.

Manually, you create an app and ad units in the AdMob console, add the Google Mobile Ads SDK, put the GADApplicationIdentifier key in Info.plist, call the SDK's start method at launch, request tracking authorization, and add the banner or interstitial views.

A SwiftUI example

Wrap the SDK's banner view so it works in SwiftUI:

import GoogleMobileAds
import SwiftUI

struct BannerView: UIViewRepresentable {
    func makeUIView(context: Context) -> BannerView {
        let banner = BannerView(adSize: AdSizeBanner)
        // Google's test banner ID. Replace with your real unit ID before release.
        banner.adUnitID = "ca-app-pub-3940256099942544/2934735716"
        banner.load(Request())
        return banner
    }
    func updateUIView(_ uiView: BannerView, context: Context) {}
}

Common pitfalls

Shipping with a test ad unit ID earns nothing, and shipping while clicking your own live ads can get your AdMob account suspended, so swap test IDs for real ones only at release. Forgetting the Info.plist app ID crashes the SDK at launch. Skipping the App Tracking Transparency prompt while still trying to use the IDFA breaks personalized ads and can fail review. Overloading screens with interstitials frustrates users and can trigger a rejection for disruptive ads, so read Apple's guidelines on ad placement.