# In-app purchases

## Using in-app purchases

Learn about how to use in-app purchases in your Expo app.

In-app purchases (IAP) are transactions within a mobile or desktop application where users can buy digital goods or additional features. This guide provides a list of popular libraries and tutorials for implementing IAP in your Expo app.
> In-app purchase libraries require configuring custom native code. Native code is not configurable when using Expo Go. Instead, create a [development build](/develop/development-builds/introduction/), which allows using a native library in your project.
## Tutorial
Video Tutorial: [Watch: How to Implement In-App Purchases in Expo](https://www.youtube.com/watch?v=R3fLKC-2Qh0)
## Libraries
The following libraries provide robust support for in-app purchase functionality and out-of-the-box compatibility with Expo apps using [CNG](/workflow/continuous-native-generation/) and [Config Plugins](/config-plugins/introduction/) for seamless integration in your app.