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Learn how to troubleshoot issues with `Flutter Firebase AdMob` ads not loading on iOS production, from initial setup to linking with the App Store.
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Troubleshooting Flutter Firebase AdMob Ads Not Loading on iOS Production

If you've recently updated your Flutter application to use the latest versions of firebase_admob, firebase_core, and firebase_analytics for AdMob, you may have encountered the frustrating issue of production ads failing to load on iOS devices. While the setup may be working correctly for test ads, production ads may not be showing as expected. Let’s delve into this common issue, why it happens, and how to resolve it.

Understanding the Problem

As many developers have discovered, when trying to display production ads using the AdMob framework in a Flutter app on iOS, they often receive the error message: "failed to load ad". The significant takeaway from this issue is that it can stem from several underlying reasons, including issues related to app publishing and linking to the AdMob network.

Key Findings:

Test Ads vs Production Ads: Test ads display without issues, but production ads do not.

Xcode Output: The debug output from Xcode shows warnings that indicate a failure to receive ads, coupled with the fact that valid ad requests are being logged in the AdMob dashboard.

The Solution Breakdown

1. Check Your App’s Publishing Status

A critical point to note is that AdMob may not display ads on an iOS physical device until the app is published on the App Store. This is due to the fact that a content rating has not yet been assigned to the app before it's published. Here’s a breakdown of the steps you may take to ensure your app can serve ads effectively:

Publish Your App: Make sure your app is fully published on the App Store.

Wait for Content Rating: It may take some time (up to a couple of weeks) for the app’s content rating to be processed by AdMob.

2. Linking Your App to AdMob

Sometimes, even after publishing, the app may not be linked properly to AdMob, preventing it from serving ads. This can lead to many requests being sent without any impressions showing up. Here’s what you can do:

Link Your App: Ensure that your AdMob account is properly linked with your app in the App Store.

Monitor Timeline: After linking the app, you might start receiving impressions within a few hours. It's important to keep an eye on this.

3. Debugging Information

Familiarizing yourself with the debugging logs can help you gain insights into what’s going wrong. Important messages to watch out for in your logs include:

No ad to show: Often indicates that while requests are being sent, there are no ads available to fulfill those requests.

Test Ads Work: If test ads load without issues, it indicates that the implementation itself is correct.

Final Thoughts

The journey of integrating Flutter Firebase AdMob can be filled with challenges, particularly when it comes to iOS production ads. Remember that proper publishing and linking to AdMob are paramount for enabling your application to serve ads successfully. Once your app is properly published and linked, you should start seeing those impressions roll in faster than expected.

Keep testing and monitoring, and don’t lose hope—many have successfully encountered and solved this exact issue, and now it’s your turn! If you follow the suggested steps, you should be well on your way to solving your ad loading woes.