> For the complete documentation index, see [llms.txt](https://docs.digitalturbine.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digitalturbine.com/dt-ignite/use-cases/checking-for-target-app-on-device.md).
# Checking for Target App on Device
The SDK allows you to determine whether a target app is installed on a device. The Host App can use this information to prevent recommending target apps that the user has already installed.
To get the installation status of a target app on a device, call the [`getApplicationDetails()` method](/dt-ignite/sdk-reference/check-for-app-on-device.md).
{% @mermaid/diagram content="sequenceDiagram
autonumber
participant Host as Host App
participant SDK as Ignite
```
Host->>SDK: Initialize and Connect
Host->>SDK: getApplicationDetails()
opt callback and/or broadcast
SDK-->>Host: onSuccess(result: AppDetailsResponse)
SDK-->>Host: onError()
end
Host->>SDK: Disconnect" %}
```
| SEQUENCE ITEM | DESCRIPTION |
| ------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| 1 | Initialization and Connection
The Host App initializes the DTIS SDK and connects to Ignite. This action establishes a secure connection between the two components and authenticates the Host App with Ignite. For more information, see Connect to Ignite.
|
| 2 | Get Installation Status
The Host App calls the getApplicationDetails() method to retrieve the installation status of the target app on the device. The call contains the name of the target app you want to check as well as the option to receive results as a callback or broadcast.
|
| 3-4 | Installation Status Notification
Ignite sends a callback and/or broadcast containing the installation status.
|
| 5 | Disconnect from Ignite
Disconnect from Ignite Services. For more information, see Disconnect from Ignite.
|
---
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