# Licensing Wijmo Applications
Learn how to License Wijmo Applications in this tutorial.
## Content
Wijmo offers a 30-day free trial, so you can experiment with the Wijmo controls without a product key. However, note that the evaluation version displays a watermark underneath, when you run your application. To use Wijmo for production purposes, you must purchase a license from the [Mescius website](https://developer.mescius.com/wijmo/pricing) or by contacting our [sales team](mailto:us.sales@mescius.com). Once you purchase the license, you will receive an email containing the serial key. Follow the steps below to remove the evaluation watermark and license your Wijmo product:1.Login to your [Mescius account](https://developer.mescius.com/login?return_url=/my-account/my-licenses#register) and [register](https://developer.mescius.com/my-account/my-licenses#register) the serial key. 2.Go to My Account > My Licenses and click “**Create Distribution Key**”. 3.Click **Add a Hostname** and enter all the host names you want to use. 4.Once all the required hostnames have been added and click “**Generate Distribution Key**”. 5.Apply the distribution key to your application using Wijmo's **setLicenseKey** method.
If you are importing Wijmo using a module loader, call **setLicenseKey** on the core Wijmo module:
```javascript
import * as wjcCore from '@mescius/wijmo';
wjcCore.setLicenseKey('your license key goes here...');
```
If you are loading Wijmo using script tags, call **setLicenseKey** as follows:
```html
```
Now you can deploy the application to any of the domains that you specified when creating the licenseKey.