> ## Documentation Index
> Fetch the complete documentation index at: https://docs.calius.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Installation

> Download, install and activate Calius in just a few seconds.

It is designed for creating pictures and easily adding items to your inventory, so you don’t have to upload media manually.

Install Calius in three steps: download the app, install it, and activate your license.

Calius runs on macOS, Windows, and iOS. \
**Calius Mobile** is a companion to the desktop app for capturing photos and adding items on the go. Mobile and desktop stay in sync. See [Mobile](/Installation) for the mobile guide.

## 1. Download

1. Open your [dashboard](https://calius.io/dashboard).
2. Go to the **License** tab.
3. Download the latest version for your operating system.

Downloads are available to users with an active license.

<Frame>
  <img src="https://mintcdn.com/calius/ByMTj6BzVe8V9I6P/images/Bildschirmfoto-2026-06-02-um-09.56.08.png?fit=max&auto=format&n=ByMTj6BzVe8V9I6P&q=85&s=45e1ca01b855a535f2886b9b924d53a2" alt="Bildschirmfoto 2026 06 02 Um 09 56 08" width="704" height="370" data-path="images/Bildschirmfoto-2026-06-02-um-09.56.08.png" />
</Frame>

## 2. Install

<Tabs>
  <Tab title="Windows">
    1. Open the `.exe` installer.
    2. Follow the wizard.
    3. Launch Calius when it finishes.
  </Tab>

  <Tab title="macOS">
    1. Open the `.dmg` file.
    2. Drag **Calius** into your Applications folder.
    3. Launch Calius.
  </Tab>

  <Tab title="iOS">
    1. Accept the TestFlight invite.
    2. Follow the install steps.
    3. Open Calius on your iPhone.
  </Tab>
</Tabs>

## 3. Activate your license

On first launch, Calius shows the **License Activation** window.

1. Open your [dashboard](https://calius.io/dashboard) and copy your **License Key**.
2. Paste it into the activation window.
3. Click **Activate**.

Calius verifies the key and opens.

## Next steps

<CardGroup cols={2}>
  <Card title="Connect a platform" icon="link" href="/platforms/connecting-accounts" />

  <Card title="Set up Calius" icon="gear" href="/Settings" />
</CardGroup>

## Troubleshooting

If installation fails:

* Check that your license is active.
* Confirm you downloaded the build for your operating system.
* Restart Calius after activating.

Still stuck? Ask in [Discord](https://discord.gg/5KEkxukpPE).