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This file describes the application and provides specific settings used by the app engine. Every application must include an app.json file in its directory. The app.json file is a single file written in JSON notation. You must use double quotes to identify object keys and values in your app.json file.

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hidden 
Indicate true if the app should not appear in the Applications screen. If you don't include this, or you indicate false, the app does appear in the Applications Screen.

Example

 {
    "name": "helloworld",
    "jsFiles": ["file1.js"],
    "type": "foreground",
    "displayName": "Hello, world!",
    "iconFile"  : "hello_world_icon.png",
    "hidden" : false,
    "hasIdle": true
}