# In-app

> The SDK asks for a card when the app becomes active. Call a named card yourself with Xulo.call.

URL: https://docs.xulo.io/ios/in-app
iOS SDK version: 0.1.4

## On an open

There is nothing to add. After `Xulo.start`, the SDK asks for a card each time the app becomes active, and draws it if one matches. While the app stays in the foreground it does not ask again.

## A named card

Call a card by its name at the moment you choose:

```swift
Xulo.call("checkout")
```

The card has to be published, and its rule has to be **An event** with the same name. A card with no trigger never matches.

The call is not stored. It asks once, at that moment, whether this device has a card for that name.

## What the SDK does

- It draws the card natively, in one of four placements: center window, full screen, top banner or bottom banner.
- It shows one card at a time.
- It counts impressions, dismissals and button clicks, keeps them on the device, and sends them in the background or with the next card request.
- A button link goes to [Xulo.onOpen](https://docs.xulo.io/ios/deep-links) first.

Cards do not need push permission. See [In-app cards](https://docs.xulo.io/concepts/in-app-cards) for the rules and placements.