Unity Changelog

Version 4.9.0 (2024-03-21) 🔗

The following new dependencies are added:

"com.chartboost.unity.threading": "1.0.0"
"com.chartboost.unity.utilities": "1.0.0"


  • Added support for ad queueing, a new feature that builds upon the existing fullscreen ad experience that allows publishers to queue up multiple fullscreen ads and show them in succession.

API Changes:

  • Added Fullscreen Ad related events to IChartboostMediationFullscreenAd object.
  • Marked events in ChartboostMediationFullscreenAdLoadRequest as deprecated. Use events from IChartboostMediationFullscreenAd instead.

Version 4.8.0 (2024-02-08) 🔗

The following ad networks have been deprecated:

  • AdColony
  • TapJoy
  • Yahoo


  • New Chartboost Mediation Unity SDK demo app.

Bug Fixes:

  • Fixed an issue with incorrect order of callbacks when ContinueWithOnMainThread Task extension is used.
  • Fixed an issue where CustomData would always be null for iOS fullscreen placements.
  • Fixed an issue where SKAdNetwork utilities would fail to account for JSON parsing issues.
  • Fixed an issue where AdapterWindows utilities would fail to account for deprecated ad networks.

Version 4.7.0 (2023-11-14) 🔗

Chartboost Mediation Unity SDK 4.7.0 is the last release for 2023. As such, we strive to make as many improvements and bug fixes as possible. However, there are a few breaking changes with this release in preperation for an easier transition to Chartboost Mediation 5.X in 2024.


  • Added AdaptersInfo data class to Chartboost Mediation Unity SDK. Integrated ad adapter information can be fetched using ChartboostMediation.AdaptersInfo.
  • Added per partner consent API. Ad partner consent can be set individually utilizing the new consent API.
  • Adapters.cs has been deprecated and replaced by Partners.cs.
  • Added ContainerSize property to the new IChartboostMediationBannerView, allowing developers to get the size of the banner container.
  • Added a setter to ChartboostMediationSettings which allow developers to set their own instance of the scriptable object.
  • Converted hard coded strings into constants across the codebase.
  • Editor Windows Adapters and Settings have been modularized and can be enabled or disabled as needed.
  • Added a main thread task continuation extension. Please use this if you would like to call asynchronous APIs from a synchronous code and want to handle results.
  • Added distribution of package through Nuget.

The following improvements will cause breaking changes:

  • ChartboostMediationUnityBannerAdEvent has been modified and now passes the associated instance into delegates as a parameter.
  • Moved ChartboostMediationFullscreenAdLoadResult.cs from Chartboost.Results to Chartboost.Requests namespace.
  • Removed Chartboost.Results namespace.

Bug Fixes:

  • Fixed compiler warnings for deprecated API calls on all platforms. Compiler flag -warnaserror has been added to test projects to avoid future similar issues.
  • Updated Usage of Getting Screen Scale on iOS 17+. UIScreen.Main.Scale has been deprecated.
  • Fixed the issue on Android where banner ads utilizing the new BannerView API would always load on the top-left location regardless of the selected location.

Version 4.6.0 (2023-10-12) 🔗


  • Added a new ChartboostMediationBannerView API for banner ads which supports adaptive banners.
  • Added a new ChartboostMediationUnityBannerAd API which allows creating and loading of banner ads using Unity gameobjects.
  • EDM updated to version 1.2.177.

Bug Fixes:

  • Initialization on unsupported platform now triggers DidStart with error.
  • Logger.Logerror now calls Debug.Logerror instead of Debug.Log.

API Changes:

  • Marked ChartboostMediationBannerAdas deprecated. Use ChartboostMediationBannerView instead.

Version 4.5.0 (2023-08-31) 🔗

  • Fixed a typo in ad-adapters.md
  • Updated native dependencies to support native SDKs for Chartboost Mediation SDK.

Version 4.4.0 (2023-07-27) 🔗


  • Added new SDK initialization method ChartboostMediation.StartWithOptions.
  • Fixed garbage collection ad disposal and invalidation logic.
  • Changed ChartboostMediation.UnexpectedSystemErrorDidOccur to be sent into the Unity main-thread.
  • Added a new EditorWindow and SettingsWindow.cs to unify the Chartboost Mediation integration into a single location. It can be accessed through the menu item Chartboost Mediation/Configure. The following feature improvements can be enabled through the new settings window:
    • Added build postprocessing capabilities to automatically add GADApplicationIdentifier to Info.plist.
    • Added build postprocessing capabilities to disable bitcode for XCode projects.
    • Added build preprocessing capabilities to automatically add com.google.android.gms.ads.APPLICATION_ID to the AndroidManifest.xml.
    • Added build preprocessing capabilities to automatically add applovin.sdk.key to the AndroidManifest.xml.

API Changes:

  • Marked ChartboostMediationPartners enum as deprecated. Use ChartboostMediation.StartWithOptions instead.

Version 4.3.0 (2023-06-22) 🔗


  • Added support for Rewarded Interstitials. This is available via ChartboostMediation.LoadFullscreenAd() and supported only in the latest adapters. Please check each adapter’s changelog to confirm which partners support rewarded interstitials.
  • Added new ChartboostMediationFullscreenAd APIs which combine and improve the interstitial and rewarded ad APIs. Previous interstitial and rewarded ad APIs are now deprecated.
  • Added LineItemName and LineItemId to BidInfo.
  • Added the ability to set consent and debug flags before calling start. Only the last change is applied and will only be updated after the SDK has finished initializing.

Bug Fixes:

  • Added newly released networks into partner kill switch enum.

Version 4.2.3 (2023-05-18) 🔗

Bug Fixes:

  • Fixed an issue with Unity-iOS Rewarded Ads hanging onto the ad instances for too long, potentially causing duplicate callback events.

Version 4.2.2 (2023-05-10) 🔗


  • Updated AdaptersWindow.cs to utilize a more comprehensive JSON schema for better handling of network dependency changes.

Bug Fixes:

  • Fixed an issue with InMobi SDK dependencies not being properly defined due to versioning differences.

Version 4.2.1 (2023-05-05) 🔗

Bug Fixes:

  • Fixed an issue where package information failed to load if projects had a large amount of packages.
  • Fixed an issue where main SDK dependency could not be generated through UPM implementation.

Version 4.2.0 (2023-05-04) 🔗


  • Editor Window, AdaptersWindow.cs, for Chartboost Mediation adapters handling. For capabilities, see below:
    • Ad Adapters are now decoupled from the Chartboost Mediation UPM package.
    • Ad Adapters can be fetched, selected, and upgraded through the new Adapters Window.
    • Adapters Window can be accessed through the Chartboost Mediation/Adapters menu.
    • Public C# API is available to automate tasks such as upgrading, adding, loading, and saving Ad Adapter selections.
    • Adapters information is automatically fetched on startup and manually through the Adapters Window.


  • Fixed standardized error reporting of ChartboostMediationError components in iOS.

API Changes:

  • Marked ChartboostMediationIntegrationChecker.cs as deprecated. Please utilize AdaptersWindow.cs instead.

Version 4.1.0 (2023-03-30) 🔗


  • Simplified AppId & AppSignature accessors in ChartboostMediationSettings.
  • Added TestMode call to ChartboostMediation.cs.
  • Made Chartboost Mediation errors readable from iOS native layer to Unity.
  • Refactored native bridge projects to follow rebranding and newer APIs.
  • Fixed usage of placements for unsupported platforms.
  • Updated documentation with AdMob and AppLovin AndroidManifest special cases.

Bug Fixes:

  • Fixed placements clearLoaded in native implementations to return void instead of boolean.
  • Fixed an issue for iOS banners crashing on removal.

Version 4.0.0 (2023-03-02) 🔗

As part of the Marketing team’s efforts to clearly articulate the use cases and customers we support by being more descriptive with our product branding, Helium is being rebranded as Chartboost Mediation.

Starting in 4.0.0, the Chartboost Mediation brand will be used in place of Helium for new additions. In the coming 4.X releases, the old Helium branding will be deprecated and the new Chartboost Mediation branding will be used to give publishers a smoother transition.


  • Revamped Helium delegates & callbacks API. (more details to come soon.)
  • Added optional PostProcessor to simplify SKAdNetwork integration process.
  • Refactored Ad Placement objects so they return empty values in unsupported platforms.
  • Cleanup and Refactoring of iOS Dependencies; native SDKs are now explicitly stated.
  • Fixed LogError method in HeliumExternal.
  • Banners ClearLoaded method no longer returns a boolean value.
  • Removed reward parameter from Reward callback since value was not being utilized.
  • Minimum iOS version changed to 12.0


  • Removed obsolete APIs in HeliumSettings.cs new accessors are available.
    API Changes & Rebranding:

  • New npm package distribution under com.chartboost.mediation

  • Namespace Helium deprecated and replaced with Chartboost.

  • HeliumIntegrationChecker deprecated and replaced with ChartboostMediationIntegration Checker.

  • HeliumError removed and replaced with descriptive string values.

  • HeliumBidInfo renamed to BidInfo

  • Delegates have been renamed from Helium to ChartboostMediation:

  • ChartboostMediationPlacementLoadEvent added, it provides bid info on load.

  • HeliumRewardEvent converted to standard ChartboostMediationPlacementEvent.

  • HeliumBidEvent merged into Load delegate mentioned above.

  • HeliumInterstitialAd renamed to ChartboostMediationInterstitialAd

  • HeliumRewardedAd renamed to ChartboostMediationRewardedAd

  • HeliumBannerAd renamed to ChartboostMediationBannerAd

  • HeliumBannerAdSize renamed to ChartboostMediationBannerAdSize

  • HeliumBannerAdScreenLocation renamed to ChartboostMediationBannerAdScreenLocation

  • HeliumSettings renamed with ChartboostMediationSettings

  • HeliumPartners renamed to ChartboostMediationPartners

For details on how to migrate from Helium 3.X to Chartboost Mediation 4.0.0, visit the corresponding documentation.

Android Migration from 3.x to 4.0.0
iOS Migration from 3.x to 4.0.0
Unity Migration from 3.x to 4.0.0

Version 3.3.2 (2023-01-26) 🔗

Bug Fixes:

  • Downgraded Yahoo 1.3.0 to Verizon 1.14.0.

Version 3.3.1 (2022-12-06) 🔗

Bug Fixes:

  • Updated FAN Dependency from 6.9.0 to 6.12.0

Version 3.3.0 (2022-12-01) 🔗


  • Refactoring of HeliumSettings Scriptable Object API.
  • Network Kill Switch.
  • Provide a Publisher API for Partner Initialization Metrics.

Bug Fixes:

  • NullReferenceException after initialization without callback subscription.
  • Credentials warning spamming
  • Detect Misconfigured Unity setup & utility methods.

Version 3.2.0 (2022-10-20) 🔗


  • Converted Android Java bridge to Kotlin.


  • Improved UnityAds integration guide and requirements.

Version 3.1.0 (2022-09-15) 🔗


  • Removed proguard for Android/Unity integration.

Bug Fixes:

  • Clear Ad requests return proper clear status. Banners always return true when cleared

Version 3.0.0 (2022-08-18) 🔗


  • Unity Package Manager distribution of the Helium SDK.
  • Helium Unity APIs updated to follow Unity/C# standard coding conventions.
  • Banner API updated from a load-show to a load-only paradigm.
  • Helium impression events are now separate from partner network impression events.
  • Sequential waterfall ad loading for all ad formats.
  • Removal of UnitySendMessage callbacks for proper Native callbacks on Android & iOS
  • HeliumBannerAd
    • Show removed. Banners are ready to show upon successful load.
    • ReadyToShow removed since it is no longer necessary.
  • HeliumSDK
    • DidShowBanner callback removed since it is no longer necessary.
    • Added the following callbacks for when Helium determines an ad to be visible on screen.
      • DidRecordImpressionInterstitial
      • DidRecordImpressionRewarded
      • DidRecordImpressionBanner

Bug Fixes:

  • Ad load requests to the native Helium SDKs are dispatched to a background thread.