---
schema_version: "1"
id: 5512336c389be81a048fa3359a332043eca4635d424ec471f8ceeb267e789657
title: Identity System Setup for Mobile Apps
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_pers_identity_mobile_apps.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_pers_identity_mobile_apps.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 1ba73bc48308213706ae9e34e03615307ecd8d19953fcdbfb9887a42e465a7c7
description: Use the Personalization identity system to identify and merge user profiles in your mobile app.
products:
  - Marketing
  - Salesforce Personalization
release: "264"
---
# Identity System Setup for Mobile Apps

Use the Personalization identity system to identify and merge user profiles in your mobile app.

- **[Identity System for Mobile Apps](https://help.salesforce.com/s/articleView?id=mktg.mc_pers_identity_mobile_apps_about.htm&release=264.0.0&type=5)**  
    The Personalization identity system enables you to select a default identity attribute to match users between your mobile application and Personalization. Personalization uses only one identity attribute in looking up and merging mobile app events.
- **[Configure the Identity System for Mobile Apps](https://help.salesforce.com/s/articleView?id=mktg.mc_pers_identity_mobile_apps_configure.htm&release=264.0.0&type=5)**  
    Select the identity attribute that Personalization uses for identity lookup and merging user profiles in mobile apps. If you have active mobile app campaigns, changing this setting can impact the content that appears for those campaigns.