---
title: "Web App SDK"
slug: "s3suite94-web-app-sdk"
updated: 2026-10-27T18:42:04Z
published: 2026-10-27T18:42:04Z
canonical: "docs.onespan.com/s3suite94-web-app-sdk"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.onespan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Web App SDK

You can use the App SDK to provide a device identifier that will be used instead of the existing device ID. To set a custom device ID, use the AppSdkInfo global object.

Example setDeviceId:

```plaintext
// Sets custom device ID for all AppSdk and AdaptiveUI instances
AppSdkInfo.setDeviceId(customDeviceId);
```