Cross-platform In App Billing Plugin for .NET
Cross-platform In App Billing Plugin for .NET
Important Note: I do not plan on continuing support for this library. As noted in April of 2025: In App Purchase APIs have always been extremely complex, hard to manage, hard to update, and hard to streamline into a single API. I have enjoyed working and evolving this project over the years, but with StoreKit being deprecated for StoreKit2 and the ever-evolving Android Billing Library that always has massive changes, I simply do not have the time and energy to keep the library up to date. I appreciate everyone that has contributed over and used the library over the years. I encourage forking and evolving the library and of course you can just pull the source code into your project directly.
A simple In-App Purchase plugin for .NET MAUI and Windows to query item information, purchase items, restore items, and more.
Subscriptions are supported on iOS, Android, and Mac. Windows/UWP/WinUI 3 - does not support subscriptions at this time.
Get started by reading through the In-App Billing Plugin documentation.
| Platform | Version |
|---|---|
| iOS for .NET | 10+ |
| macCatlyst for .NET | All |
| Android for .NET | 21+ |
| Windows App SDK (WinUI 3) | 10+ |
| .NET MAUI | All |
AcknowledgePurchaseAsync is now FinalizePurchaseAsyncIf you receive an error in Google Play you may need to add this to your AndroidManifest.xml inside the application node:
Update X.X.X with the version of the Billing Library that is a dependency on the NuGet package.
To respond to pending transactions you can subscribe to a listener in your Android project startup:
…
If you do connect the IsConnected propety will be true and when you make purchases or check purchases again you should check ahead of time and not re-connect or disconnect if there are pending purchases
I highly recommend reading the entire Google Play Billing System docs.
On Android if you purchase anything you must first Acknowledge a purchase else it will be refunded. See the android documentation.
https://developer.android.com/google/play/billing/integrate#process https://developer.android.com/google/play/billing/integrate#pending
For consumables, the consumeAsync() method fulfills the acknowledgement requirement and indicates that your app has granted entitlement to the user. This method also enables your app to make the one-time product available for purchase again.
So, if you have a consumable... ConsumePurchaseAsync will also acknowledge it, if you have a non-consumable you will need to call AcknowledgePurchaseAsync.
For linking if you are setting Link All you may need to add:
Plugin.InAppBilling;Xamarin.Android.Google.BillingClient
-keep class com.android.billingclient.api.** { *; }
-keep class com.android.vending.billing.** { *; }
--linkskip=Plugin.InAppBilling
The MIT License (MIT), see LICENSE file.
All I have ever asked is to be active by submitting bugs, features, and sending those pull requests down! Want to go further? Make sure to subscribe to my weekly development podcast Merge Conflict, where I talk all about awesome Xamarin goodies and you can optionally support the show by becoming a supporter on Patreon.
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