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How to Change Ad Type and Ad IDs

Everything ad-related is centralized in lib/constants/ad_config.dart:

class AdConfig {
  /// Master switch. `false` disables every ad (interstitial + rewarded) app-wide.
  static const bool adsEnabled = true;

  /// `true` shows Google AdMob rewarded ads, `false` falls back to Unity Ads.
  static const bool wantGoogleAd = true;

  /// AdMob rewarded ad unit id — ships with Google's public test ID, replace before release.
  static const String rewardedAdID = 'ca-app-pub-XXXXXXXXXXXXXXXX/XXXXXXXXXX';

  /// AdMob interstitial ad unit id — ships with Google's public test ID, replace before release.
  static const String interstitialAdID = 'ca-app-pub-XXXXXXXXXXXXXXXX/XXXXXXXXXX';

  /// Unity Ads game id — ships with Unity's public test ID, replace before release.
  static final String unityGameId = Platform.isAndroid ? 'XXXXXXX' : 'XXXXXXX';

  // unityRewardedPlacementId / unityInterstitialPlacementId also live here.

  /// Max rewarded-ad coin claims allowed per calendar day.
  static const int adLimit = 5;

  /// Coins credited per rewarded-ad watch.
  static const int adRewardAmount = 50;
}
  1. Choose your ad network — set wantGoogleAd to true for Google AdMob, or false to use Unity Ads instead.
  2. Google AdMob — replace rewardedAdID and interstitialAdID with your real ad unit IDs from the AdMob console. Format: ca-app-pub-XXXXXXXXXXXXXXXX/XXXXXXXXXX — your publisher ID, then the ad unit number. For account setup, app registration, and creating ad units step by step, see the Google AdMob Setup Guide.
  3. Unity Ads — replace unityGameId, and the placement IDs returned by unityRewardedPlacementId / unityInterstitialPlacementId, with your own from the Unity Ads dashboard.
  4. Daily reward limit / reward amount — change adLimit (max rewarded-ad claims per day) and adRewardAmount (coins per watch).

App-level Ad IDs​

Separately from the ad unit IDs above, both platforms also need your AdMob App ID (not an ad unit ID) registered at the platform level:

  • Android — android/app/src/main/AndroidManifest.xml, under the com.google.android.gms.ads.APPLICATION_ID meta-data tag.
  • iOS — ios/Runner/Info.plist, under the GADApplicationIdentifier key.

The App ID uses a ~ (not /) and looks like ca-app-pub-XXXXXXXXXXXXXXXX~XXXXXXXXXX. Find it in the AdMob console under Apps → your app → App settings, or in the Google AdMob Setup Guide.

For full platform setup (manifest permissions, Info.plist entries, SDK init), see the google_mobile_ads platform setup guide.