Rewarded interstitial (beta)

Rewarded interstitial is a type of incentivized ad format that allows you offer rewards for ads that appear automatically during natural app transitions. Unlike rewarded ads, users aren't required to opt-in to view a rewarded interstitial.

Prerequisites

• Google Mobile Ads SDK 7.60.0 or higher.
• Complete the Get started guide.

Implementation

The primary steps to integrate rewarded interstitial ads are as follows:

• Load an ad
• [Optional] Validate SSV callbacks
• Register for callbacks
• Display the ad and handle the reward event

Load an ad

Loading an ad is accomplished using the load(adUnitID:request) method on the GADRewardedInterstitialAd class.

Swift

import GoogleMobileAds
import UIKit

class ViewController: UIViewController {

  private var rewardedInterstitialAd: GADRewardedInterstitialAd?

  override func viewDidLoad() {
    super.viewDidLoad()

    Task {
      do {
        rewardedInterstitialAd = try await GADRewardedInterstitialAd.load(
          withAdUnitID: "/21775744923/example/rewarded-interstitial", request: GAMRequest())
      } catch {
        print("Failed to load rewarded interstitial ad with error: \(error.localizedDescription)")
      }
    }
  }
}

SwiftUI

import GoogleMobileAds

class RewardedInterstitialViewModel: NSObject, ObservableObject,
  GADFullScreenContentDelegate
{
  @Published var coins = 0
  private var rewardedInterstitialAd: GADRewardedInterstitialAd?

  func loadAd() async {
    do {
      rewardedInterstitialAd = try await GADRewardedInterstitialAd.load(
        withAdUnitID: "ca-app-pub-3940256099942544/6978759866", request: GADRequest())
      rewardedInterstitialAd?.fullScreenContentDelegate = self
    } catch {
      print(
        "Failed to load rewarded interstitial ad with error: \(error.localizedDescription)")
    }
  }
RewardedInterstitialViewModel.swift

Objective-C

#import "ViewController.h"

@interface ViewController ()
@property(nonatomic, strong) GADRewardedInterstitialAd* rewardedInterstitialAd;
@end

@implementation ViewController

- (void)viewDidLoad {
  [super viewDidLoad];

  [GADRewardedInterstitialAd
      loadWithAdUnitID:@"<var label='the ad unit ID'>/21775744923/example/rewarded-interstitial</var>"
                request:[GAMRequest request]
      completionHandler:^(
          GADRewardedInterstitialAd* _Nullable rewardedInterstitialAd,
          NSError* _Nullable error) {
        if (!error) {
          self.rewardedInterstitialAd = rewardedInterstitialAd;
        }
      }
  ];
}

Tip: You can use ad load calls to build up a cache of preloaded ads before you intend to show them, so that ads can be shown with zero latency when needed. Since ads expire after an hour, you should clear this cache and reload with new ads every hour.

[Optional] Validate server-side verification (SSV) callbacks

Apps that require extra data in server-side verification callbacks should use the custom data feature of rewarded ads. Any string value set on a rewarded ad object is passed to the custom_data query parameter of the SSV callback. If no custom data value is set, the custom_data query parameter value won't be present in the SSV callback.

The following code sample demonstrates how to set custom data on a rewarded interstitial ad object before requesting an ad.

Swift

do {
  rewardedInterstitialAd = try await GADRewardedInterstitialAd.load(
    withAdUnitID: "/21775744923/example/rewarded-interstitial", request: GAMRequest())
  let options = GADServerSideVerificationOptions()
  options.customRewardString = "SAMPLE_CUSTOM_DATA_STRING"
  rewardedInterstitialAd.serverSideVerificationOptions = options
} catch {
  print("Rewarded ad failed to load with error: \(error.localizedDescription)")
}

Objective-C

[GADRewardedInterstitialAd
    loadWithAdUnitID:@"/21775744923/example/rewarded-interstitial"
              request:GAMRequest
    completionHandler:^(GADRewardedInterstitialAd *ad, NSError *error) {
      if (error) {
        // Handle Error
        return;
      }
      self.rewardedInterstitialAd = ad;
      GADServerSideVerificationOptions *options =
          [[GADServerSideVerificationOptions alloc] init];
      options.customRewardString = @"SAMPLE_CUSTOM_DATA_STRING";
      ad.serverSideVerificationOptions = options;
    }];

Key Point: The custom reward string is percent escaped and might require decoding when parsed from the SSV callback.

Register for callbacks

In order to receive notifications for presentation events, you must implement the GADFullScreenContentDelegate protocol and assign it to the fullScreenContentDelegate property of the returned ad. The GADFullScreenContentDelegate protocol handles callbacks for when the ad presents successfully or unsuccessfully, and when it is dismissed. The following code shows how to implement the protocol and assign it to the ad:

Swift

import GoogleMobileAds
import UIKit

class ViewController: UIViewController, GADFullScreenContentDelegate {

  private var rewardedInterstitialAd: GADRewardedInterstitialAd?

  override func viewDidLoad() {
    super.viewDidLoad()

    Task {
      do {
        rewardedInterstitialAd = try await GADRewardedInterstitialAd.load(
          withAdUnitID: "/21775744923/example/rewarded-interstitial", request: GAMRequest())
        self.rewardedInterstitialAd?.fullScreenContentDelegate = self
      } catch {
        print("Failed to load rewarded interstitial ad with error: \(error.localizedDescription)")
      }
    }
  }

  /// Tells the delegate that the ad failed to present full screen content.
  func ad(_ ad: GADFullScreenPresentingAd, didFailToPresentFullScreenContentWithError error: Error) {
    print("Ad did fail to present full screen content.")
  }

  /// Tells the delegate that the ad will present full screen content.
  func adWillPresentFullScreenContent(_ ad: GADFullScreenPresentingAd) {
    print("Ad will present full screen content.")
  }

  /// Tells the delegate that the ad dismissed full screen content.
  func adDidDismissFullScreenContent(_ ad: GADFullScreenPresentingAd) {
    print("Ad did dismiss full screen content.")
  }
}

SwiftUI

Assign the fullScreenContentDelegate property to the returned ad:

rewardedInterstitialAd?.fullScreenContentDelegate = self
RewardedInterstitialViewModel.swift

Implement the protocol:

func adDidRecordImpression(_ ad: GADFullScreenPresentingAd) {
  print("\(#function) called")
}

func adDidRecordClick(_ ad: GADFullScreenPresentingAd) {
  print("\(#function) called")
}

func ad(
  _ ad: GADFullScreenPresentingAd,
  didFailToPresentFullScreenContentWithError error: Error
) {
  print("\(#function) called")
}

func adWillPresentFullScreenContent(_ ad: GADFullScreenPresentingAd) {
  print("\(#function) called")
}

func adWillDismissFullScreenContent(_ ad: GADFullScreenPresentingAd) {
  print("\(#function) called")
}

func adDidDismissFullScreenContent(_ ad: GADFullScreenPresentingAd) {
  print("\(#function) called")
  // Clear the rewarded interstitial ad.
  rewardedInterstitialAd = nil
}
RewardedInterstitialViewModel.swift

Objective-C

@interface ViewController () <GADFullScreenContentDelegate>
@property(nonatomic, strong) GADRewardedInterstitialAd *rewardedInterstitialAd;
@end

@implementation ViewController

- (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view.

  [GADRewardedInterstitialAd
      loadWithAdUnitID:@"/21775744923/example/rewarded-interstitial"
                request:[GAMRequest request]
      completionHandler:^(
          GADRewardedInterstitialAd *_Nullable rewardedInterstitialAd,
          NSError *_Nullable error) {
        if (!error) {
          self.rewardedInterstitialAd = rewardedInterstitialAd;
          self.rewardedInterstitialAd.fullScreenContentDelegate = self;
        }
      }];
}

/// Tells the delegate that the ad failed to present full screen content.
- (void)ad:(nonnull id<GADFullScreenPresentingAd>)ad
didFailToPresentFullScreenContentWithError:(nonnull NSError *)error {
    NSLog(@"Ad did fail to present full screen content.");
}

/// Tells the delegate that the ad will present full screen content.
- (void)adWillPresentFullScreenContent:(nonnull id<GADFullScreenPresentingAd>)ad {

    NSLog(@"Ad will present full screen content.");
}

/// Tells the delegate that the ad dismissed full screen content.
- (void)adDidDismissFullScreenContent:(nonnull id<GADFullScreenPresentingAd>)ad {
  NSLog(@"Ad did dismiss full screen content.");
}

Display the ad and handle the reward event

Key Point: Before displaying a rewarded interstitial ad to users, you must present the user with an intro screen that provides clear reward messaging and an option to skip the ad before it starts. Learn more.

When presenting your ad, you must provide a GADUserDidEarnRewardHandler object to handle the reward for the user.

The following code presents the best method for displaying a rewarded interstitial ad.

Swift

func show() {
  guard let rewardedInterstitialAd = rewardedInterstitialAd else {
    return print("Ad wasn't ready.")
  }

  // The UIViewController parameter is an optional.
  rewardedInterstitialAd.present(fromRootViewController: nil) {
    let reward = rewardedInterstitialAd.adReward
    print("Reward received with currency \(reward.amount), amount \(reward.amount.doubleValue)")
    // TODO: Reward the user.
  }
}

SwiftUI

Listen to UI events in the view to display the ad.

var rewardedInterstitialBody: some View {
  // ...
  }
  .onChange(
    of: showAd,
    perform: { newValue in
      if newValue {
        viewModel.showAd()
      }
    }
  )
RewardedInterstitialContentView.swift

Present the rewarded interstitial ad from the view model:

func showAd() {
  guard let rewardedInterstitialAd = rewardedInterstitialAd else {
    return print("Ad wasn't ready.")
  }

  rewardedInterstitialAd.present(fromRootViewController: nil) {
    let reward = rewardedInterstitialAd.adReward
    print("Reward amount: \(reward.amount)")
    self.addCoins(reward.amount.intValue)
  }
}
RewardedInterstitialViewModel.swift

Objective-C

- (void)show {
  // The UIViewController parameter is nullable.
  [_rewardedInterstitialAd presentFromRootViewController:nil
                                userDidEarnRewardHandler:^{

                                  GADAdReward *reward =
                                      self.rewardedInterstitialAd.adReward;
                                  // TODO: Reward the user.
                                }];
}

Examples on GitHub

View the full rewarded interstitial ads examples in your preferred language:

• Swift
• SwiftUI
• Objective-C

Next steps

Learn more about user privacy.