# IAppIdentifier Interface

Namespace: [Qlik.Engine](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.htm)  
Assembly: Qlik.Engine.dll

Token to identify a unique Qlik Sense app

## Syntax

```
public interface IAppIdentifier
```

## Properties

| Name | Description |
| --- | --- |
| [AppId](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IAppIdentifier.AppId.htm#Qlik_Engine_IAppIdentifier_AppId) | The machine-readable id of the app |
| [AppName](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IAppIdentifier.AppName.htm#Qlik_Engine_IAppIdentifier_AppName) | The human-readable name of the app |
| [ConnectedUsers](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IAppIdentifier.ConnectedUsers.htm#Qlik_Engine_IAppIdentifier_ConnectedUsers) | Number of connected users |
| [FileSize](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IAppIdentifier.FileSize.htm#Qlik_Engine_IAppIdentifier_FileSize) | The application file size on disk |
| [FileTime](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IAppIdentifier.FileTime.htm#Qlik_Engine_IAppIdentifier_FileTime) | The application file time |
| [LastReloadTime](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IAppIdentifier.LastReloadTime.htm#Qlik_Engine_IAppIdentifier_LastReloadTime) | Last reloaded time |
| [Meta](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IAppIdentifier.Meta.htm#Qlik_Engine_IAppIdentifier_Meta) | Meta information about the application |
| [Thumbnail](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IAppIdentifier.Thumbnail.htm#Qlik_Engine_IAppIdentifier_Thumbnail) | Thumbnail for the application |
| [Title](https://help.qlik.com/en-US/sense-developer/May2026/Subsystems/NetSDKAPIref/Content/Qlik.Engine.IAppIdentifier.Title.htm#Qlik_Engine_IAppIdentifier_Title) | Title for the application |