Unity Changelog

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.