Power Fx and cards overview

Important

Effective August 29, 2025, Cards for Power Apps will be deprecated and no longer supported. As a result, any Cards for Power Apps that have been built and shared in Microsoft Teams will not function. Users will not be able to create new cards or execute existing ones.

We recommend migrating any functionality you rely on from Cards for Power Apps before the deprecation date. Consider transitioning to either Adaptive Cards in Copilot Studio or adaptive cards for Microsoft Teams for similar functionality. More information: Deprecation of Cards for Power Apps

Power Fx is a low-code programming language available across the Power Platform, including in Power Apps cards. Cards can calculate values, perform tasks, and respond to user input using formulas expressed in Power Fx. Power Fx expressions can also update variables and data sources. Expressions can be combined to create complex formulas that can handle advanced business logic.

Power Fx documentation

For more information on Power Fx formulas that work in cards, see Formula reference for Cards. When you're working with cards, you'll also find the following articles especially helpful:

• Expression grammar
• Operators
• Variables
• Formula reference

For more information on Power Fx formulas that work in cards, see Formula reference for Cards.

Important

Defaults isn't supported. Instead use Collect, for example, instead of Patch(account, Defaults(account), {"Account Name": "Example Account"}) use Collect(account, {"Account Name": "Example Account"}).

Large tables (delegation)

Working with large data sets in cards can impact performance. Take heed of delegation warnings. Learn more about delegation.

Cards supports delegating the following functions:

• LookUp

Dataverse types

Cards don't support Image, URL, File, or ManagedProperty column types yet.