# What are Perception Apps?

> **Deprecation Notice**
> This page describes features that have been removed or replaced in Luxonis Hub. Functionality may be limited and only available to Hub Original customers. Please refer to the up-to-date guides to provision devices, manage fleets, and deploy applications.

Perception Apps are a cornerstone of the Luxonis Hub ecosystem, enabling developers to deploy and manage sophisticated perception
and AI applications across a fleet of devices. These applications, specifically designed to run on the Luxonis Hub Agent, leverage
the power of OAK cameras to provide advanced perception capabilities. Written primarily in Python and utilizing the `robothub`
library in conjunction with `depthai`, Perception Apps offer a streamlined path from development to deployment, emphasizing ease
of use, scalability, and reliability.

## How Perception Apps Work

Perception Apps integrate seamlessly into the Luxonis Hub platform, following a lifecycle that transitions from development to
deployment and operation. Here's how it works:

### Development

Developers write Perception Apps using Python, taking advantage of the `robothub` library to interact with the cloud and `depthai`
for camera operations. These apps are containerized, ensuring a consistent execution environment across all devices. This
containerization is crucial for maintaining app stability and compatibility, regardless of the deployment scale.

### Deployment

Once a Perception App is developed, the developer uploads it to Luxonis Hub. This process includes creating a new app entry in the
platform and uploading the containerized app package. Luxonis Hub maintains a list/history of versions for each app, allowing for
easy management and version control.