# Integrating the ONE store ALC SDK

The ONE store Application License Checker (ALC) SDK allows ONE store to verify that an app on a device was officially downloaded via ONE store and that verified users are using the app. To support license checking in the US region, integrate the ONE store ALC SDK V2 according to the [ALC Guide](https://onestore-dev.gitbook.io/dev/eng/tools/alc) in the ONE store Developer Center documentation.

Integrating the ALC SDK requires a license key that is unique to your app.

To obtain your app-specific license key for the ALC SDK:

1. If you have not already done so, register your app with ONE store. For more information, see [Registering an App for ONE store](/one-store/configuring-apps-in-one-store-developer-center/registering-an-app-for-one-store.md).
2. In the [ONE store Developer Center](https://dev.onestore.net/), go to **APPS→Applications**.
3. Select your app and go to **Common Info→Settings for Licensing**. \
   The **Licensing** page displays the generated ALC license key for your app.


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