App cards overview - HubSpot docs

Add a layer of UI customization to your app by including app cards that can display data, allow users to perform actions, and more. You can build app cards that display on CRM records, preview panels, the help desk workspace, and the sales workspace. Once the app is installed in an account, Super Admins and users with Customize record page layout permissions can add any included app cards to their configured locations in HubSpot. Screenshot of a custom app card in the middle column of a contact record

Screenshot of a custom app card in the middle column of a contact record

To get started building app cards:

Follow the quickstart guide to start with a new app, or check out the app creation guide to customize the features and configuration of a new app.
Migrate an existing legacy private or public app to the developer platform.
Learn how to add an app card to an existing developer platform app.
Review the app card reference documentation for a full breakdown of app card options and features.

If you plan on distributing your app on the HubSpot Marketplace, any app cards you’ve built are subject to a technical review from the HubSpot Ecosystem Quality team, and must adhere to the requirements listed here.